Vashon Schematic Designs

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Vashon Island

KCLS Vashon LibraryRenovation and Addition

Schematic Design Document

Prepared b yBohlin C ywinski Jackson

December 10, 2010


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Team

CLIENT TEAM

OwnerKing County Library System960 Newport WayIssaquah WA 98027Kay Johnso n, Director Facilities Developm ent

GeotechnicalPanGEO, Inc.3213 Eastlake Avenue East, Suite B

Seattle, WA 9 8102Siew L. Tan, Principal

SurveyPace Engineers, Inc1601 Second Avenue, Suite 1000Seattle WA 9 8101Neil Sherman Cabbage

DESIGN TEAM

ArchitectBohlin C ywinski Jackson1932 First Avenue, Suite 916Seattle, WA 9 8101Peter Boh lin, FAIA, Lead DesignerRobert Miller, AIA, LEED, Principal in Charge

Terrence Wagner, AIA, Project ManagerCivilPace Engineers, Inc1601 Second Avenue, Suite 1000Seattle WA 9 8101Chris Rhinehart, P.E. Sr. Project M anager

LandscapeAllwo rth Design

1100 North 35th

StreetSeattle WA 9 8103Randy Allworth, Principle

StructuralPCS Structural Solutions811 First Avenue, Suite 510Seattle WA 9 8104

Mechanical & ElectricalFlack + Kurtz600 University St., Suite 500Seattle WA 98 101Henry DiGregrio, Senior Vice PresidentKimb erly Paulson P.E., LEED AP Senior Assoc iate

LightingFlack + Kurtz600 University St., Suite 500Seattle WA 98 101Henry DiGregrio, Senior Vice PresidentMelanie Taylor IALD, LEED AP Senior Associate

AcousticalThe Greenbusch G roup

1900 West Nickerson Street, Suite 201Seattle WA 98 119Julie Wiebusc h, INCE LEED AP, President

CostRobinson Company101 Stewart Street, Suite 925


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General Information

MAAC $2,750,000

Delivery Metho d Design/B id/Build

Anticipated Bid Date November 1, 2011

Duration of Construction 12 Months

LEED/Sustainability LEED Acc reditation nor being sought. Look ing for intelligent sustainable designdecisions

Estimated Sq Ft Breakdown Existing Building to be Renovated 6187 sq ft

Existing Crawl Space to Remain 6187 sq ft

New Main Floor 3399 sq ft

New Lower Level Mec hanical 400 sq ft

New Crawl Space 2912 sq ft

Totals

Main Floor Plate 958 6 sf

Craw l Space and Low er Level Mec hanical 9499 sf

Note: Gross square feet

Phasing Requirements No phasing requirements

Bid Alternates Not yet identified


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Schedule

2 1

Novemb er Com plete Ground Lease Agreements with Vashon ParksDistrict

Prepare Schematic Design (SD) Package and Cost Estimate

Submit SD Package and Cost Estimate to KCLS

SD Package and Co st Estimate Approved b y KCLS

Decemb er Begin Design Developm ent (DD)

2 11

January

Set up Pre-Submittal Meeting with King County DDES

February Prepare DD Design Package and Cost Estimate

Submit DD Design Package and Cost Estimate

March DD Design Package and Cost Estimate App roved by KCLS

Construction Do cum ents (CD) Phase starts

May Subm it Drawings to DDES for County Permits

Seek Temporary Library location for Library Holds and ChoiceReads

June - Octo ber Prepare 75% CD Cost Estimate and Drawing Package

Submit 75% CD Package and Co st Estimate

75% C D Package Approved by KCLS

Com plete CD Design and Identify Bid Alternates

Respond to DDES Staff Comm ents and Clarifications

Novemb er-December Incorporate DDES Permit Com ments and Decisions

Prepare Bidders Package

2 12

January Issue Bid Package

February-March Bidding

Open Bids and Award Contract

Secure Bonds, Insurance and Sub Contractors


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April Library Reopens


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Zoning and CodeAnalysis

Zoning Location 17210 Vashon Highway SW

Parcel Numb er 29230 39044Zoning R-4-P and R-12

Zoning Overlays VS-P27

VS-P28

Building Built 1983

Sprinklers No

SEPA Project is exemp t as it is a com merc ial structure less

than 12,000sf with 40 or fewer parking spaces per

Code Occup ancy Types Multipurpose Type A-3

Library (Collections) Type A-3

Library (Staff) Type B

Const ruction Type Type V-B Limited to (1) story and 6,000 sf

Section 506.3 Automatic Fire Sprinkler System

Increase allows for 30 0% increase for one story Type

V-B Buildings

Note: Bu ilding is fully sprink lered in lieu of 1 hour

construction. One hour separation is required

betw een Occupancy Types A-3 and Type B.

Plumbing Occup ancy Square Footage Load Factor Total Load

Building Gross 9303 sf

Net Occupied

A-3 7320 sf 30/ sf 244

B 1006 sf 200/ sf 5.03

249

124.5 / per sex

Water Closets Required (per Table 29 02.1)


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Attachments

Soils Report Pan Geo

Hazardous Materials Report N/ A

MEP Systems Narrative WSP Flack + Kurtz

Civil Narrative Pace Engineering

Acoustical Narrative The Greenbusch Group

Cost Estimate The Robinson Com pany

Architectural Schematic Drawing Set

A1.00 Site Plan (includes grading and extent of Landsc ape)

A2.00 New Floor Plan

A2.01 Demo Floor Plan

A2.10 Foundation Plan

A2.20 Attic Plan/ Top of Trusses

A2.3 Roof Plan

A3.01 Building Cross Section

A3.02 Building Longitud inal Drawings

A4.01 Building Elevations

A4.02 Building Elevations

Structural Schematic Drawing Set

S2.00 Foundation Plan

S2.10 Low Roof / Attic Framing Plan S2.20 Roof Framing Plan

Data/Telecom Infrastructure Drawing

Octob er 29, 2010 IT Schematic


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The existing parking lot is to remain as designed. It will be repaved and re-stripped once construction is complete

as it will be used for construction support and new utilities will need to be trenched though it. Subtle changes will

be m ade to the handicap spaces to m ake them van accessible and meet current cod e.

The existing concrete seating area and trees at the entry are to be removed to open the entry up to the

surrounding park and make it more welcoming. A new bench and the potential for public art are being planned.

Renovation and Addition

The existing 6200 sq ft building is to be gut renovated and brought up to current standards for seismic and life

safety issues. New additions totaling roughly 3799 sq ft are to be added to the existing building.

The three new add itions are:

A glu-lam framed Reading Room and M ultipurpose Room of 2873 sq ft with 400 sq ft Mechanical Room and

2473 sq ft of crawl space below. Room is framed w ith glu-lam bents at 4-0 o.c. with continuous aluminum

framed window wall clipped to the glu-lam structure with a green roof.

A wood framed Childrens Area of 416 sq ft with a partial crawl space below

A new glu-lam framed Entry Vestibule of 110 sq ft slab on grade construction.

The primary goals of the renovation and add ition are:

To open up the Library to Ober Park

To provide m ore space for patrons w ho use the Library including significantly more seating

To provide a larger Meeting Room that is contiguous with the Reading Room

To upgrade services for patrons including better rest rooms, more space and greater access to power for use

with laptops and other devices

To provide the Library with imp roved thermal comfort and better natural and artificial lighting To improve life safety with upgraded seismic construction and the addition of a complete sprinkler system

To reduce resource consumption and become more environmentally sensitive with green roofs and rain

gardens to deal with runoff.

Roof

Existing Building Existing metal roof to be removed and replaced with new 3-tab asphalt shingle.

New Roofs New Reading Room is to have a green roof by Xero Floor or Hydro tech. Green roof

system is to be lightweight extensive garden roof consisting of sedums in a 3 +/-

dep th soil planting.


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At the M eeting Room storage boxes and around the new Childrens Room

extension a wood com posite such as Trespa is to be used.

Interior Finishes

Flooring Floors at the Reading Room , Meeting Room and Cop y Room are to be 36 sq

carpet tiles by M illiken (the KCLS standard).

Flooring at the entry vestibule will be a walk off grate.

Floors at the Rest Rooms, Staff Work Room, Staff Break Room, Office andTelecom/Data are to be sheet good Mannington Commercial sheet vinyl

Walls Unless noted below all walls are to be 5/8 painted gyp board .

The Telecom /Data room will have plywood backer board

All walls at the w et side of the Public Rest Room s will be tile to 8- 0. All other wallswill be and behind the tile will be cementitious backer board.

The janitors closet w ill have FRP or p lastic laminate panels to 3- 0w ill metal edges.

All walls at the Meeting Room are to be Trespa or some similar wood composite

prod uct as is the feature wall at the Entry Vestibule and Self Check.

Ceilings Ceilings at the Reading Room and Meeting Room will be exposed to view ACC

plywood structure w ith a clear finish.

Ceilings at the Childrens Area will be a dropped wood slat with acoustical

treatment above.

Ceilings at the Workroom, Breakroom, Office and storage are to be drop acoustical

tile ce iling

Ceilings at the Study Rooms, Public Restrooms and Staff WC are to be painted

gypsum wall board.


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Exterior metalwork is to be painted with Benjamin Moore 2-part Aliphatic Acrylic

Urethane.

Casework

Locations Included Workroo m, Staff Break Room , Staff WC, Public Rest Room vanities, Meeting Room

Kitchenette, Cyberbar, Study Rooms, Copier

Circu lation Desk OFOI

Com puter Tables OFOI

Library Shelving OFOI Estey Cant ilever Library shelving in Arc tic White .

Shelving End Panels OFOI

Shelving Lighting OFOI

Equipment

Safe OFOI one Diebold Large Manager Comp artment, Mo del 20537- R77Y

Boo k Drops Kingsly lockable type through wall book drop s in bid

Appliances OFOI

Furniture

FFE Covers all mo vable furniture in pub lic and staff areas including systems furniture at

staff area. FFE is a separate bud get item.


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Cost Estimate Execut ive Summary

BUILDING

DIVISION DESCRIPTION TOTAL

A1010 STANDARD FOUNDATIONS 92,427

A1030 SLAB ON GRADE 13,762

B1010 FLOOR CONSTRUCTION 66,440

B1020 ROOF CONSTRUCTION 150,549

B2010 EXTERIOR WALLS 73,924

B2020 EXTERIOR WINDOWS 192,848

B2030 EXTERIOR DOORS 20,300

B3010 ROOF COVERINGS 229,282

C1010 PARTITIONS 69,433

C1020 INTERIOR DOORS 19,400

C1030 FITTINGS 23,759

C3010 WALL FINISHES 54,890

C3020 FLOOR FINISHES 40,345

C3030 CEILING FINISHES 36,488D2090 OTHER PLUMBING SYSTEMS 68,160

D3090 OTHER HVAC SYSTEMS & EQUIPMENT 249,975

D4090 OTHER FIRE PROTECTION SYSTEMS 44,074

D5010 ELECTRICAL SERVICE & DISTRIBUTION 117,768

D5020 LIGHTING & BRANCH WIRING 141,797

D5030 COMMUNICATIONS & SECURITY SYSTEMS 84,075

E1090 OTHER EQUIPMENT 7,000E2010 FIXED FURNISHINGS 70,958

F2010 BUILDING ELEMENTS DEMOLITION 66,315

Z1010 ADMINISTRATION 315,000

ESTIMATE SUBTOTAL 2,248,967

DESIGN CONTINGENCY @ 7.50% 168,673

SUBTOTAL 2,417,640GENERAL CONTRACTOR'S OH & P @ 6.50% 157,147

SUBTOTAL 2,574,786

ESCALATION TO 15-MAR-12 (3.00%/YR) @ 3.99% 102,734

TOTAL BUILDING 2,677,520


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SITE

DIVISION DESCRIPTION TOTAL

G1010 SITE CLEARING 15,400

G1020 SITE DEMOLITION & RELOCATIONS 10,476

G1030 SITE EARTHWORK 60,000

G2020 PARKING LOTS 19,009

G2030 PEDESTRIAN PAVING 8,010

G2040 SITE DEVELOPMENT 5,000

G2050 LANDSCAPING

PLANTING 30,500

TOPSOIL AND MULCH 18,500GREEN ROOF (IN ROOF COVERINGS

ABOVE) 0

IRRIGATION 20,500

RAIN GARDEN STRUCTURAL CONCRETE 5,500

SITE FIXTURES 11,500

G3010 WATER SUPPLY & DISTRIBUTION SYSTEMS 20,500

G3020 SANITARY SEWER 0

G3030 STORM SEWER 15,500

G4010 ELECTRICAL DISTRIBUTION 25,744

ESTIMATE SUBTOTAL 266,139


SUBTOTAL 286,099

GENERAL CONTRACTOR'S OH & P @ 6.50% 18,596

SUBTOTAL 304,695


TOTAL SITE 316,853


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TOTALS

DESCRIPTION TOTAL

BUILDING 2,677,520

SITEWORK 316,853

TOTAL BUILDING AND SITEWORK 2,994,373

MACC 2,750,000

ESTIMATE OVER MACC (244,373)

COST REDUCTIONS

DESCRIPTION TOTAL

SQUARE FOOTAGE

DELETE ONE BAY AT NEW ADDITION 25,690

ELIMNATE VAULTING AT CIRCULATION 72,145

MATERIAL QUALITY

KEEP EAST CLERESTORY WINDOWS 14,280 12,000+19%

DELETE EXTERIOR VENETIAN SUNSHADES 31,188 26,208+19%

CHANGE STAFF AREA CEILINGS TO ACT FROM GWB 4,874 4,096+19%

REDUCE AREA OF ACT GLUED TO GYP CEILING 2,998 2,520+19%

CHANGE ROOF FROM METAL TO SHINGLE 77,766 65,350+19%

DELETE MOTORIZED BLINDS (KEEP CONDUIT) 25,704 21,600+19%

TOTAL COST REDUCTIONS 254,645

ESTIMATE UNDER THE MACC 10,272

ADDITIONAL COST REDUCTION ALTERNATES IDENTIFIED

DESCRIPTION TOTALDELETE GREEN ROOF 25,132 21,120+19%

DELETE TRESPA AT INTERIOR 24,990 21,000+19%

DELETE MOTORIZED WINDOWS (KEEP OPERABLE) 17,609 5,950+8,848+19%


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COST REDUCTIONS: SQUARE FOOTAGE

DELETE ONE BAY AT NEW ADDITION 25,690

ELIMNATE VAULTING AT CIRCULATION 72,145

COST REDUCTION: MATERIAL QUALITY

KEEP EAST CLERESTORY WINDOWS 14,280 12,000+19%DELETE EXTERIOR VENETIAN

SUNSHADES 31,188 26,208+19%CHANGE STAFF AREA CEILINGS TO ACT FROM

GWB 4,874 4,096+19%

REDUCE AREA OF ACT GLUED TO GYP CEILING 2,998 2,520+19%CHANGE ROOF FROM METAL TO

SHINGLE 77,766 65,350+19%

DELETE MOTORIZED BLINDS (KEEP CONDUIT) 25,704 21,600+19%

TOTAL COST REDUCTIONS 254,645

ESTIMATE UNDER THE MACC 10,272 ADD TO DESIGN

CONTINGENCY

ADDITIONAL DEDUCT ALTERNATES IDENTIFIED

DELETE GREEN ROOF 25,132 21,120+19%DELETE TRESPA AT INTERIOR 24,990 21,000+19%DELETE MOTORIZED WINDOWS (KEEP

OPERABLE) 17,609 5,950+8,848+19%


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Geotechnical & EarthquakeEngineering Consultants

June 28, 2010

File No. 10-066

Ms. Kay Johnson

King County Library System

960 Newport Way NorthwestIssaquah, WA 98027

Re: Geotechnical Engineering Report

KCLS Vashon Public Library

17210 Vashon Highway SW

Vashon Island, Washington

Dear Ms. Johnson:

Please find attached our geotechnical engineering report to assist you and the project

team with design and construction of the proposed alterations to the Vashon Public

Library on Vashon Island. This report documents the subsurface conditions at the site

and our geotechnical engineering recommendations for the proposed project.

Based on the results of our subsurface exploration program and our review of existinginformation, the project site is underlain by competent soils (glacial till) at shallow

depths. These conditions are conducive to the use of conventional shallow foundations to

support the new structure. Due to historic grading of the site, up to 7 feet of fill soil exists

over the competent native soil, and some localized over-excavation of unsuitable soils

and replacement with structural fill will be required, especially in the northeast corner of

the proposed addition.

We appreciate the opportunity to work with you and the design team on this project.

Please call if there are any questions.

Sincerely,


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TABLE OF CONTENTS

1.0 INTRODUCTION....................................................................................................... 1

2.0 SITE AND PROJECT DESCRIPTION ................................................................... 1

3.0 SUBSURFACE EXPLORATIONS........................................................................... 2

4.0 SUBSURFACE CONDITIONS ................................................................................. 2

4.1SOILS ......................................................................................................................... 2

4.2GROUNDWATER......................................................................................................... 3

5.0 EXISTING BUILDING CONDITION ..................................................................... 3

6.0 SEISMIC CONSIDERATIONS ................................................................................ 4

6.1SEISMIC DESIGN PARAMETERS................................................................................... 4

6.2LIQUEFACTION ASSESSMENT ..................................................................................... 4

7.0 GEOTECHNICAL RECOMMENDATIONS.......................................................... 4

7.1FOOTING DESIGN PARAMETERS ................................................................................. 4

7.1.1 Bearing Pressure and Subgrade Preparation ................................................... 5

7.1.2 Lateral Resistance.............................................................................................. 5

7.2BELOW-GRADE WALLS.............................................................................................. 6

7.2.1 Lateral Earth Pressures..................................................................................... 67.2.2 Surcharge Loads................................................................................................ 6

7.2.3 Lateral Resistance.............................................................................................. 6

7.2.4 Wall Drainage.................................................................................................... 6

7.2.5 Wall Backfill ...................................................................................................... 7

7.3PROPOSED PEDESTRIAN WALKWAY........................................................................... 7

8.0 CONSTRUCTION CONSIDERATIONS ................................................................ 7

8.1SITE PREPARATION..................................................................................................... 7

8.2TEMPORARY EXCAVATIONS....................................................................................... 8

8.3MATERIAL REUSE ...................................................................................................... 8

8.4STRUCTURAL FILL...................................................................................................... 8

8.5EROSION AND DRAINAGE CONSIDERATIONS .............................................................. 9


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TABLE OF CONTENTS (continued)

LIST OF FIGURES

Figure 1 Vicinity Map

Figure 2 Site and Exploration Plan

Appendix A: Hand Boring Summary Logs

Figure A-1 Terms and Symbols for Boring and Test Pit Logs

Figure A-2 Hand Boring Summary Logs HB-1 through HB-3


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GEOTECHNICAL ENGINEERING REPORT

KCLSVASHON PUBLIC LIBRARY

17210VASHON HIGHWAY SWVASHON ISLAND,WASHINGTON

______________________________________________________________________________

1.0 INTRODUCTION

This report presents the results of geotechnical engineering studies that were undertaken to

support the design and construction of the proposed alterations to the Vashon Public Library, onVashon Island, Washington. Our study was performed in accordance with the King County

Library System On Call Services Agreement effective April 26, 2010, and work order number

one, dated April 26, 2010. Our service scope included reviewing readily available geologic data,

conducting a site reconnaissance, advancing hand borings at the site, and developing the

conclusions and recommendations presented in this report.

2.0 SITE AND PROJECT DESCRIPTION

The project site is located at 17210 Vashon Highway SW, on Vashon Island, Washington (see

Figure 1). The site is currently occupied by the KCLS Vashon Public Library, which is located

in the southeast corner of the site, and an asphalt paved parking area, which is located along the

southern portion of the site (see Figure 2). The remainder of the site is occupied by lawn, and

serves as a community park. The existing library is a one-story structure with an unfinished

crawl space.

The general topography of the area slopes gently to the north and east, while the site topography

has been modified by past grading activities, and is undulating. Based on our review of the site

survey prepared by PACE Engineering, dated May 11, 2006, the relatively level parking area at

the south end of the site is at an elevation of about 350 feet, which generally matches the

finished floor elevation of the existing library. The northern portion of the site is generally level,

with only a gentle slope down to the northeast, and has an elevation ranging from about 343 to

340 feet. Between the relatively level southern and northern portions of the site described above,

previous grading activities created soils berms approximately 4 to 6 feet tall. In particular, soil

has been bermed up against the north and west sides of the existing library. Plate 1 below shows

existing conditions at the project site.


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Vashon Public Library 17210 Vashon Highway SW, Vashon Island, WA

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Plate 1: Looking south at the existing library. The proposed addition will be located to the north of the library in

the picture foreground.

3.0 SUBSURFACE EXPLORATIONS

To explore subsurface conditions at the subject site, we advanced three hand borings (HB-1

through HB-3) around the perimeter of the proposed addition. The approximate boring locations

are indicated on Figure 2, and were located based on relative distances from existing site

features. The hand borings were advanced utilizing a 3-inch diameter hand auger. An engineer

from PanGEO performed the explorations and logged the subsurface conditions encountered in

the test holes. The relative density of granular soils and the relative consistency of cohesive soils

were generally estimated based on the drilling resistance encountered throughout the depth of the

explorations, and on the penetration resistance of the soil from a -inch diameter steel hand

probe. After the test holes were completed, they were backfilled with excavated spoils, and the

surface tamped firm. The excavated soils were described using the system outlined on Figure A-1, and the summary hand boring logs are included in Appendix A.

4.0 SUBSURFACE CONDITIONS


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Hand boring HB-1 was located on an existing soil berm near the northeast corner of the proposedaddition. HB-1 encountered about 7 feet of loose fill material before encountering the top of the

native medium dense to dense glacial till. Based on our visual estimate, and the site topographic

survey provided to us, we estimated that the glacial till was located at approximately elevation

340 feet.

Hand boring HB -2, which was located near the northwest corner of the proposed addition in the

relatively level grass area, encountered only about 9 inches of topsoil and fill before

encountering the native glacial till. Based on our visual estimate, the glacial till at this boring

location exists at approximately elevation 343 feet.

Finally, hand boring HB-3, which was advanced adjacent to the existing library building near the

southwest corner of the proposed addition, encountered about 6 feet of loose fill soils over the

native medium dense to dense glacial till. At this location we estimated the glacial till to be

located at an approximate elevation of 344 feet.

4.2GROUNDWATER

Groundwater was not observed within the depths of the three hand borings advanced at the site.

However, we observed moist to wet soils within about one foot above the contact with the native

glacial till. Due to the dense nature of the till, and high fines content, we anticipate that water

becomes perched on the till layer during certain times of the year. In addition, it is common for

glacial till to contain layers of clean sand and gravel that often contain water. It is anticipatedthat groundwater conditions will vary depending on the season, local subsurface conditions, and

other factors.

5.0 EXISTING BUILDING CONDITION

We conducted a brief reconnaissance of the existing library structure to observe the performance

and condition of the building. Our reconnaissance of the exterior of the building revealed thatthe brick facade was in generally good condition, with almost no visible signs of stress cracks,

settlement or distress. We also excavated one test hole near the northwest corner of the existing

structure to verify the depth of the existing footing. The test hole, which was adjacent to hand

boring HB-3, encountered the top of footing about 5 feet below the ground surface which would


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7.1.1 Bearing Pressure and Subgrade Preparation

For footings bearing on the native medium dense to dense glacial till, or properly compacted

structural fill, we recommend sizing the footings using a bearing pressure of 3,000 psf. The

bearing pressure may be increased by one-third for transient loads such as seismic and wind

loads. As described above, we anticipate that up to 4 feet of over-excavation of unsuitable loose

fill soils and replacement with properly compacted granular structural fill will be required in the

northern portion of the library addition. The structural fill should extend horizontally at least

one foot beyond the edge of the footings. Prior to placing the structural fill, the exposed

subgrade, which should consist of the native, undisturbed medium dense to dense silty sand soil

(till) should be compacted to a dense condition. If the subgrade at that level is yielding after re-

compaction, it should be over-excavated and replaced with compacted structural fill. Footing

excavations and compaction should be observed by a representative of PanGEO, prior to placing

forms or rebar, to verify that conditions are as anticipated in this report.

All footings should be embedded a minimum of 18 inches below final finished grade. Stripfootings should have a minimum width of 18 inches; isolated column footings should have a

minimum width of 24 inches.

Total and differential settlements are anticipated to be within tolerable limits for footings

designed and constructed as discussed above. Footing settlement under static loading conditions

are estimated to be less than about 1 inch and differential settlement across the building should

be less than about inch. Most of the anticipated settlements are likely to occur duringconstruction as dead loads are applied.

The contractor should be aware that the site soils are moisture sensitive due to its high fines

content, and will become disturbed and soft when exposed to inclement weather conditions. As

a result, depending on the weather condition at the time of footing construction and the actual

soil conditions encountered, it may be necessary to place 2 to 3 inches of lean-mix concrete on

the exposed footing subgrade to protect against moisture and disturbance. In addition, water

bearing sand seams could be present at or near the footing excavations. If sand seams are

encountered, the contractor should be prepared to dewater the footing excavations using sumps

and pumps to allow for proper subgrade preparation.

7 1 2 Lateral Resistance


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perforated footing drain surrounded with washed rock and a geotextile fabric be installed alongthe base of the footing around the exterior of the addition.

7.2.5 Wall Backfill

The below grade walls may be backfilled with native site soils provided that they can be

adequately compacted and that a pre-fabricated drainage mat is installed over the exterior wall

face for drainage. Because the native site soils contain a high percentage of fines (i.e. silt andclay), they have poor drainage characteristics. In addition, these materials are moisture sensitive

and are difficult or impossible to compact during wet weather. In the winter, an all-weather

material should be used as structural backfill, such as City of Seattle Type 17 material or

Washington State Department of Transportation Gravel Borrow (Standard Specification 9-

03.14(1)).

Wall backfill should be moisture conditioned to within about 3 percent of optimum moisture

content, placed in loose, horizontal lifts less than 8 inches in thickness, and systematicallycompacted to a dense and relatively unyielding condition and to at least 95 percent of the

maximum dry density, as determined using test method ASTM D 1557. Within 5 feet of the

wall, the backfill should be compacted to 90 percent of the maximum dry density.

7.3PROPOSED PEDESTRIAN WALKWAY

We understand that the existing pedestrian walkway may be relocated to the east of its currentlocation, such that it runs along the western side of the new library addition. In general, based

on our subsurface exploration HB-3, we anticipate that the relocated walkway will be underlain

by up to about 6 feet of fill soil. To improve the performance of the walkway, which we

anticipate will be asphalt surfaced, we recommend that a minimum of 4 inches of properly

compacted crushed surfacing top course (CSTC) be placed directly below the concrete walk to

function as a leveling course and to provide firm uniform support for the walkway. Prior to

crushed rock placement and compaction, the exposed subgrade should be heavily compacted to adense condition. If soft or loose yielding soils, or soils with prevalent organics, are encountered

within the subgrade, they should be over-excavated a maximum of one foot and replaced with

properly compacted structural fill.


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of approximately 8 inches will generally be necessary. Actual stripping depth should be basedon field observation at the time of construction. In no case should the stripped or grubbed

materials be used as structural fill or mixed with material to be used as structural fill. The stripped

materials may be wasted on site in non-structural landscaping areas or they may be exported.

8.2TEMPORARY EXCAVATIONS

We anticipate that footing excavations will encounter up to approximately 7 feet of fill soil

overlying the native medium dense to dense glacial till soils. Temporary excavations greater

than 4 feet deep should be properly sloped or shored. All temporary excavations should be

performed in accordance with Part N of WAC (Washington Administrative Code) 296-155. The

contractor is responsible for maintaining safe excavation slopes and/or shoring. For planning

purposes, the temporary excavations may be sloped to as steep as 1(H):1(V) within the fill soil

and (H):1(V) within the glacial till soils. Temporary excavation slope angles should be re-

evaluated in the field during construction, however, based on actual observed soil conditions.

8.3MATERIAL REUSE

We anticipate that the surficial fill consists of till spoil that was generated during construction of

the original library or during past grading in the vicinity of the site. The contractor should be

aware that such soils, as well as the native glacial till, are moisture sensitive. The re-use of these

materials as structural fill may be possible only if they are properly handled and if the earthwork

occurs during periods of dry weather. If use of the existing soils is planned, any excavated soil

should be stockpiled and protected with plastic sheeting to prevent softening from rainfall.

Alternatively, if the excavated soils become wet and unsuitable, or are exported from the site, we

recommend that backfill soil consist of granular structural fill as described below.

8.4STRUCTURAL FILL

Structural fill may be required to backfill footings and behind below grade walls. Granularimport soils, such as Seattle Type 17 or Gravel Borrow from the WSDOT Standard

Specifications (9-03.14(1)) should be used as an all weather structural fill during wet weather, or

if on-site soils cannot be properly re-used. The structural fill should be moisture conditioned to

within about 3 percent of optimum moisture content, placed in loose, horizontal lifts less than 8


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8.5EROSION AND DRAINAGE CONSIDERATIONS

Surface runoff can be controlled during construction by careful grading practices. Typically, this

includes the construction of shallow, upgrade perimeter ditches or low earthen berms to collect

runoff and prevent water from entering excavations. All collected water should be directed to a

positive and permanent discharge system such as a storm sewer. It should be noted that the site

soils are prone to surficial erosion. Special care should be taken to avoid surface water on open

cut excavations and exposed slopes should be protected with visqueen.

Permanent control of surface water should be incorporated in the final grading design. Finished

surfaces should be graded to slope away from building foundations. Water should not be

allowed to pond immediately adjacent to buildings or paved areas. Roof down spout drainage

should be collected and tightlined to appropriate outlets. All drainage should be directed into

conduits which carry runoff away from the building and paved areas into storm drain systems or

other appropriate outlets. Roof runoff should not be discharged into the footing drains.

8.6WET WEATHER EARTHWORK RECOMMENDATIONS

In our opinion, the proposed project may be accomplished during the winter without adversely

affecting the site stability. However, earthwork construction performed during the drier summer

months likely will be more economical. Winter construction will require the implementation of

best management erosion and sedimentation control practice to reduce the chances of off-site

sediment transport. The site soils contain a high percentage of fines and are moisture sensitive.Any subgrade soils that become softened either by disturbance or rainfall should be removed and

replaced with properly compacted granular structural fill or lean-mix concrete. General

recommendations relative to earthwork performed in wet conditions are presented below:

Site stripping, excavation and subgrade preparation should be followed promptly by

the placement and compaction of clean structural fill, capillary break material or base

course material;

The size and type of construction equipment used may have to be limited to prevent

soil disturbance;

During wet weather, the allowable fines content (material by weight passing the #200


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June 28, 2010

Bales of straw and/or geotextile silt fences should be strategically located to controlerosion and the movement of soil.

9.0 ADDITIONAL SERVICES

To confirm that our recommendations are properly incorporated into the design and construction

of the proposed library addition, PanGEO should be retained to conduct a review of the final

project plans and specifications, and to perform a field-monitoring program during construction.As part of the permitting process, geotechnical construction inspection services may also be

required by the local jurisdiction. Specifically, we anticipate that geotechnical construction

monitoring services may include the following:

Review of final project plans and specifications

Over-excavation depth determination;

Footing subgrade verification prior to construction of foundation elements;

Verification of compaction of structural fill;

Observation of installation and performance of erosion control measures; and

Other consultation as may be required during construction

Modifications to our recommendations presented in this report may be necessary, based on the

actual conditions encountered during construction.

10.0 LIMITATIONS

We have prepared this report for use by the King County Library System and the project design

team. Recommendations contained in this report are based on a site reconnaissance, a

subsurface exploration program, review of pertinent subsurface information, and our

understanding of the project. The study was performed using a mutually agreed-upon scope ofwork.

Variations in soil conditions may exist between the locations of the explorations and the actual

conditions underlying the site. The nature and extent of soil variations may not be evident until


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June 28, 2010

procedures, except as specifically described in our report for consideration in design.Additionally, the scope of our work specifically excludes the assessment of environmental

characteristics, particularly those involving hazardous substances. We are not mold consultants

nor are our recommendations to be interpreted as being preventative of mold development. A

mold specialist should be consulted for all mold-related issues.

This report may be used only by the client and for the purposes stated, within a reasonable time

from its issuance. Land use, site conditions (both off and on-site), or other factors including

advances in our understanding of applied science, may change over time and could materially

affect our findings. Therefore, this report should not be relied upon after 24 months from its

issuance. PanGEO should be notified if the project is delayed by more than 24 months from the

date of this report so that we may review the applicability of our conclusions considering the

time lapse.

It is the clients responsibility to see that all parties to this project, including the designer,

contractor, subcontractors, etc., are made aware of this report in its entirety. The use ofinformation contained in this report for bidding purposes should be done at the contractors

option and risk. Any party other than the client who wishes to use this report shall notify

PanGEO of such intended use and for permission to copy this report. Based on the intended use

of the report, PanGEO may require that additional work be performed and that an updated report

be reissued. Noncompliance with any of these requirements will release PanGEO from any

liability resulting from the use this report.

We appreciate the opportunity to be of service.

PanGEO Inc.

i C ib S


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June 28, 2010

11.0 REFERENCES

Booth, D. B., Troost, K.G., Wisher, A. P., 2007, The Geologic Map of King County,

Washington, scale 1:100,000.

International Building Code (IBC), 2009, International Code Council.

WSDOT, 2010, Standard Specifications for Road, Bridges, and Municipal Construction.


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Site Location

Image Credit: Google Maps


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Approx Scale

Number and Approximate Locationof Hand Boring

Legend:

HB-1

VASHONHIG

HWAYSW

HB-1

HB-2

HB-3

346348

350

352

354

354

352

350

342

340

338

344

346

348



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June 28, 2010

APPENDIX A

HAND BORING SUMMARY LOGS

TEST SYMBOLS

SAND / GRAVEL SILT / CLAY

RELATIVE DENSITY / CONSISTENCYfor In Situ and L aboratory Testslisted in "Other Tests" column.


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MONITORING WELL

50

Density

DESCRIPTIONS OF SOIL STRUCTURES

Breaks along defined planes

Fracture planes that are polished or glossy

Angular soil lumps that resist breakdown

Soil that is broken and mixed

Less than one per foot

More than one per foot

Angle between bedding plane and a planenormal to core axis

Very Loose

Loose

Med. DenseDense

Very Dense

SPTN-values

App rox . Undrained ShearStrength (psf)

50

30

Layered:

Laminated:

Lens:

Interlayered:

Pocket:

Homogeneous:

Highly Organic Soils

Silt and Clay

Very Soft

Soft

Med. StiffStiff

Very Stiff

Hard

BottomofBoring

CBR

Comp

Con

DD

DS

%F

GS

Perm

PP

R

SG

TV

TXC

UCC

50%or more passing #200 sieve

Groundwater Level at time of drilling (ATD)Static Groundwater Level

Cement / Concrete Seal

Bentonite grout / seal

Silica sand backfill

Slotted tip

Slough

4000

Fissured:

Slickensided:

Blocky:

Disrupted:

Scattered:

Numerous:

BCN:

COMPONENT DEFINITIONS

UNIFIED SOIL CLASSIFICATION SYSTEM

MAJOR DIVISIONS GROUP DESCRIPTIONS

Notes:



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g y y y


June 28, 2010

Hand Boring HB-1

Location: Northeast corner of proposed addition (see Figure 2)

Approximate ground surface elevation: 347 feet

Ground Surface Condition: Sod

Depth (ft) Material Description

0 3 4-inches of sod over loose, moist, brown, silty SAND with some gravel

and trace organics (TOPSOIL/FILL)

3 7 Loose, moist to wet, brown, fine sandy SILT with some gravel (FILL)

7 7 Medium dense to dense, moist to wet, tan/brown, silty SAND with

trace gravel (TILL)

Hand boring terminated approximately 7 feet below ground surface.

Hand Boring HB-2

Location: Northwest corner of proposed addition (see Figure 2)


Ground Surface Condition: Sod


0 4-inches of sod over loose, moist, brown, silty SAND with some

organics (TOPSOIL) 1 Medium dense to very dense, moist, gray brown, silty SAND with trace

gravel (TILL)

Hand boring terminated approximately 1 feet below ground surface.

Hand Boring HB-3

Location: Southwest corner of proposed addition (see Figure 2)


Ground Surface Conditions: Topsoil



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Engineers | Planners | Surveyors

Vashon Island Library


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Vashon Island LibraryPACE Proj. No. 10 605Schematic Phase Design Narrative8 November 2010

4. Paving:Minor sawcut and re-grading will be required in existing asphalt parking lot at two accessibleparking spaces to meet ADA requirements. The asphalt parking lot will receive 2-inch asphaltoverlay and be re-striped for parking, including 2 ADA van spaces.

A new pervious concrete path will be built from the existing library parking lot to the Parksparking lot to the north.

No street improvements are included.


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allworth designL A N D S C A P E A R C H I T E C T S

Vashon Island LibraryLandscape Architectural NarrativeSchematic Design PhaseNovember 24, 2010

Note: Refer to the Schematic Landscape Plan dated November 24, 2010 and prepared incoordination with this narrative.

1. Soil Preparation:Soil preparation will include restored lawn areas, planting areas, rooftop planting area, and the raingarden. Lawn areas will receive 8 inches of sandy loam topsoil over sloped subgrade. Ground levelplanting areas will receive 8 inches of a three way mix of sand, loam and composted organic

material plus a two inch top dressing of composted mulch. The rooftop planting will receiveapproximately 4 inches of lightweight topsoil mix. See the civil engineers narrative for soil depthat the rain garden. Rain garden soil wil l be composed of a mix of sand and composted organicmaterial. Note that general proposed grading of landscape areas is indicated on the Landscape PlanL1.0. Grading will ul timately be included on the civil engineers drawings.

2. Irrigation:The areas of new lawn will be irrigated as part of the existing Vashon Parks Department irrigation

system. Since the areas of new lawn include grade changes and other construction impacts, theexisting irrigation system in these areas will need to be removed and replaced with new irrigationlines and heads. All other landscape areas including new planting areas adjacent to the library,rooftop planting, and rain garden planting will be irrigated with a new system (separate from theparks department system) that will include a new point of connection, backflow prevention device,and automatic controller at the library

11/ 24/ 2010Vashon Island Library


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Vashon Island LibraryPage 2 of 2

3. Planting:Plantings include new medium to large scale shade trees, small scale trees, low plants andgroundcovers adjacent to the building, rain garden plantings, and rooftop planting.

Several medium to large scale shade trees are proposed in the area to the west of the library entry.Proposed species being considered are Ginkgo (Ginkgo biloba), Green Ash (Fraxinuspennsylvanica), or European Beech (Fagus sylvatica) The shade trees are located far enough fromthe building that their canopy will not likely extend over the roof line for at least 50 years. Theshade trees will be high branched to allow visibility beneath the foliage. Serviceberry (Amelanchiersp.) is proposed as a small scale tree. These trees will be spaced widely to the west and north of the

library to add spring flowers (white) and interest to the environment without obstructing views orthe negatively impacting the open character of the site. Serviceberry is drought tolerant.

Proposed low plants and groundcovers include Dwarf Oregon Grape (Mahonia repens) andKinnickinick (Arctostaphyllos uva-ursi) along the west side of the building. Sword Fern(Polystichum munitum), Salal (Gaultheria shallon), and Low Oregon Grape (Mahonia nervosa) areproposed at the north side of the building. Japanese Holly (Ilex crenata) is proposed along thesouth edge of the library building. All of the low plants and groundcovers being considered are

drought tolerant and all but the Japanese Holly are native northwest plants.

Proposed rooftop plantings include a mix of sedum varieties. Sedums are very drought tolerantand some species are native. Proposed rain garden plantings include native plant species DwarfRedtwig Dogwood (Cornus s. Kelseyi) and Common Rush (Juncus effusus).


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Vashon IslandLibrary Expansion Vashon, WA

Mechanical, Plumbing, FireProtection, Electrical andLighting Systems

Description Report

100% Schematic Design

Prepared for:

Bohlin Cywinski Jackson1932 1

stAvenue Suite 916


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Systems Description for Mechanical,Plumbing, Fire Protection, Electrical andLighting Systems

Vashon Island Library ExpansionVashon, WA

TABLE OF CONTENTS

I. MEP UTILITIES........................................................................................3

II. HEATING, VENTILATING, AND AIR CONDITIONING............................4

III. PLUMBING/FIRE PROTECTION.............................................................8

IV. ELECTRICAL.........................................................................................10

V. FIRE ALARM SYSTEM ..........................................................................15

VI. LIGHTING SYSTEM ..............................................................................17


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Basis of Design of Mechanical, Plumbing,Fire Protection and Electrical Systems


I. MEP UTILITIES

A. NATURAL GAS

There is no existing natural gas service to the existing building and no newservice will be provided for the mechanical equipment and domestic hot waterequipment.

B. SANITARY SEWER

The existing sanitary sewer service to the building will remain unchanged.

C. ELECTRICAL

Existing PSE electrical service will remain unchanged.

D. DOMESTIC WATER AND FIRE PROTECTION

The existing domestic water service to the building will remain unchanged. A firesprinkler system will be added to the existing building which will require a newfire service line.

E. STORM WATER DRAINAGE SYSTEM

Internal roof and overflow drainage are not expected on this project.


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II. HEATING, VENTILATING, AND AIR CONDITIONING

A. DESIGN CRITERIA

1. Outdoor Design Conditions:

Summer: 78F dry bulb (Puget Sound ASHRAE 0.5%)

62F wet bulb (Puget Sound ASHRAE 0.5%).

Winter: 23F dry bulb (Puget Sound ASHRAE 0.2%)

B. CODES AND STANDARDS

The following codes and standards are applicable, in addition to any other localcode requirements.

2009 International Building Code with Washington State Amendments

2009 International Mechanical Code with Washington Amendments

2009 Uniform Plumbing Code with Washington State Amendments

2009 Washington State Energy Code

C. INDOOR DESIGN CONDITIONS

1. Heating Setpoint: 70 deg F

2. Cooling Setpoint: 78 deg F

3. Relative Humidity: No specific control.

4. Air Pressure Relationships:

a. Library, Meeting, and Work Areas: Generally ambient to positivecompared to outdoors. Design to be +0.05 SP compared toambient

b. Restrooms: Negative to adjacent spaces.

5. Internal Load Densities for Cooling Load Design

Type of SpaceLighting

Watts/ft2

ReceptacleLoad Watts/ft

2

Occupancyft

2/person

Library 1.3 .5 50

Meeting Room 1.0 0.5 20

Offices 1.0 1.5 140

Work Room 1.0 1.5 140


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6. Noise Criteria - Provide equipment, air distribution systems and airdevices not to exceed the following NC (Noise Criteria) or RC (RoomCriteria) levels (this criteria will need to be confirmed with the projectacoustical consultant in the design development phase):

Space LibraryMeeting Rooms,Offices, and WorkRooms

Back ofHouse

Maximum NC orRC Level (Hertz)

NC / RC 30

(db)

NC / RC 35

(db)

NC / RC 40

(db)

31.5 -- / 55 -- / 60 -- / 65

63 57 / 50 60 / 55 64 / 60

125 47 / 45 53 / 50 57 / 55

250 41 / 40 46 / 45 51 / 50

500 35 / 35 40 / 40 45 / 45

1000 31 / 30 36 / 35 41 / 40

2000 29 / 25 34 / 30 39 / 35

4000 28 / 20 33 / 25 38 / 30

8000 27 / -- 32 / -- 37 / --

7. Building Envelope Assumptions for Cooling and Heating Design

The building envelope will meet the Washington State Energy Coderequirements either through the Prescriptive or Component Performance

path. Prescriptive requirements as follows for Climate Zone 1:a. Glazing: Low-e, insulated windows (0 to 40% glazing area)

(1) U-value: 0.40

(2) Solar Heat Gain Coefficient: 0.40

b. Exterior Facade:

(1) Walls: R-21

(2) Roofs: R-38

(3) Slab on Grade: R-10

8. Ventilation Design Basis:

a. Minimum Outside Air will be provided in accordance with the2009 International Mechanical Code.

b. Public Toilets: 2 cfm/ft2(exhaust)


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serve the remodeled library above. AHU-1 will serve the new meetingroom in the main library space. AHU-2 will serve the staff office andwork area at the south end of the building. AHU-3 will serve the westside perimeter of the library. AHU-4 will serve the east and northperimeter of the main library and AHU-5 will serve the interior of thelibrary space. Each air handler will have a mixed air plenum with outsideair and return air dampers to provide an economizer mode.

Five new condensing units will be provided that will have capacity to

match the new heating and cooling loads for the building due to the newarchitectural envelope and programming. The new condensing units willbe placed at the northern wall of the crawl space beneath the newmeeting room. Outside air will be provided by an architectural louver atthe face of the north wall of the crawl space. The crawlspace willaccommodate new supply and return air ductwork distribution. Thesupply air distribution will be provided at the floor to utilize the spaceavailable and to reduce duct conflict with lighting and architecture.Diffusers will all be flush with the finished floor.

Trane Split System Heat Pump

2. Mixed Mode:

The remodel to the library provides for an opportunity to utilize the use ofa mixed-mode system for the library with operable windows on the eastand west faade as well as a mechanical louver at the top of the monitorthat runs above the middle of the main library space. When the outdoorair temperature is mild, between 60-76 degrees F, the operable windowswill open as well as the monitor louver to produce a natural convectioneffect in the main library space. This will allow for the perimeter airhandlers AHU-3 and AHU-4 to be turned off to save energy


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4. Duct Construction Standards:

Air ducts will be constructed to the following standards:

a. Supply, return and exhaust ductwork will be constructed inaccordance with 1995 SMACNA construction, 1 inch pressureclass, seal Class A.

5. Acoustics:

As part of the design development, all of the mechanical systems willneed to be reviewed by the acoustical consultant to ensure the desirednoise and vibration levels throughout the building meet projectrequirements. Recommendations will be incorporated into theconstruction documents.

Critical items requiring acoustical evaluation include, but are not limitedto, the following areas or systems: condensing units in the crawlspace,air handling units in the crawlspace, and interior spaces.

6. Miscellaneous HVAC Items:The following items are provided upon construction completion by thecontractors:

a. Full maintenance brochures/manuals for all equipment and allcontrols, including Owners operating instructions.

b. Full as-built shop drawings, complete temperature controldrawings, complete equipment submittals and cut sheets.

c. Commissioning, testing and balancing of the mechanicalsystems.


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III. PLUMBING/FIRE PROTECTION

A. CODES AND STANDARDS

This installation will comply with the following:

2009 Uniform Plumbing Code with Washington State Amendments

B. WATER SUPPLY

Water will be supplied to the relocated toilet rooms via the existing service. Thecurrent domestic water supply does not have backflow prevention so a newbackflow preventer will be installed in the new sprinkler room where the domesticwater piping will be re-routed.

C. DOMESTIC HOT AND COLD WATER

Inside the building and at the water service entrance, the piping will be type Lcopper tube with wrought copper fittings and soldered joints. The solder will belead-free, 95-5 type solder. Distribution piping will be either PEX pipe or copper(contractors option). Pro-press joints will be allowed on copper piping.

The existing domestic hot water heater and all associated piping and accessorieswill be removed. Domestic hot water for the restrooms and custodian sink will besupplied from an electric water heater located in the existing attic. The sink inthe meeting room will have a semi-instantaneous water heater located in the

cabinet below or adjacent to the sink.

D. SANITARY SEWER AND WASTE SYSTEM

An extension of the existing sanitary waste and vent system will be provided tothe new Toilet Rooms and to the new sink in the Meeting Room. These systemswill be designed in accordance with the Uniform Plumbing Code for gravity flow.Soil, waste and vent lines will be sized per UPC using good engineering practice.

Sanitary waste and vent piping above and below ground will be service weighthubless cast iron pipe. Couplings for below ground installation shall be cast-ironand above ground shall be heavy duty stainless steel couplings.

E. STORM DRAINAGE SYSTEM

A l t f d i d fl t i t t d


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FIRE PROTECTION SYSTEMS

A. CODES AND STANDARDS

1. NFPA 13, Installation of Sprinkler Systems, 2007 Edition.

B. FIRE PROTECTION

1. The building will be protected by a hydraulically calculated sprinkler

system. The sprinkler system will be design build based on aperformance specification.

2. A 4-inch water service to the building will be extended from a nearbywater main.

3. Located in the sprinkler room, a double check valve assembly will beinstalled to protect the water system from contamination and a dry valveand air compressor for the dry sprinkler system.

4. There will be two subsystems installed in this building, a dry system forthe crawlspace and unheated spaces and a wet system for theremainder of the building. The wet system will be served by an alarmvalve and associated trim. The dry system will be served by a dry pipevalve, air compressor and associated trim. Both valves will containaddressable alarm and supervisory devices that will be monitored by thebuilding fire alarm system.

5. A low pressure fire department connection will be located outside thebuilding, connected to the system with check valves.

6. All sprinkler systems shall be hydraulically calculated. In the eventdesign criteria information from the project fire insurance underwriter isunavailable at the time of initial design, the following minimum criteriashall be used.

a. Light Hazard: Library floors shall be sized to deliver 0.10 gpm/sq.ft over an area of 1500 sq. ft. at the most

hydraulically remote location.

b. Ordinary Hazard: Group 1: Crawl space, tenant service area,piping shall be sized to deliver 0.15 gpm/sq. ft. over1500 sq. ft. at the most hydraulically remote location.


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Basis of Design of Mechanical Pl mbing Vashon Island Librar E pansion


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a. 400A panel: mechanical loads

b. (2) 225A 2-section panel: receptacle loads

c. 225A 2 section panel: lighting loads

d. 60A SPD/TVSS

e. (2) 225A spare

f. (2) 100A spare

6. The new library roof will house PV (photovoltaic) arrays. Size and areato be determined. Provisions for PV system will be provided.

7. The remodel and expansion of the library will have an estimated demandload of 17 watts/sf.

8. All existing raceways and cabling will be demolished or replaced.

9. The existing power to the existing site lighting will be intercepted to willbe re-fed from the new electrical service.

10. The existing fire alarm system will be removed and replaced with neSilent Knight fire alarm system.

11. The interior and existing lighting will be controlled by the buildings BMSsystem via Watt Stopper lighting relay panel(s).

C. ELECTRICAL DESIGN CRITERIA

1. Disconnect switches: Heavy duty, horsepower rated, quick-make, quick-break, dead-front type. Self contained unit in a NEMA 1 enclosure(NEMA 3R where installed outdoors).

2. Panel-boards: Corrosion resistant galvanized (zinc finished) sheet steel.Fronts shall be cold rolled steel, finish coated with ANSI 61 gray enamelover a rust inhibitor. Bus bars shall be copper, full size neutral bus.Provide an equipment ground bus in each panel-board. Overcurrentprotection devices shall be molded case circuit breakers for branchpanel-boards and fused switches for distribution panels. Door-in-doorconstruction.

Basis of Design of Mechanical Plumbing Vashon Island Library Expansion


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a. HVAC equipment

b. Plumbing equipment

c. Fire protection equipment

d. Owner furnished equipment

e. Convenience and special purpose receptacles

f. Electric Door lock

g. Security System

h. Office Supplies: Laminators, printer, fax, battery charger, copymachine

5. Raceways:

a. All wire and cable shall be installed in the existing walker duct,conduit or raceway where applicable.

b. Provide empty conduit for A/V, security, and PA system.

c. Rigid Steel Conduit: Rigid conduit, heavy wall, hot dippedgalvanized inside and out, threaded ends, with threaded typefittings. Use where exposed to physical damage, indoors whereexposed to physical abuse and exposed outdoor installations.

d. Electrical Metallic Tubing: Continuous, seamless steel tubing,galvanized or sherardized on exterior, coated on interior withsmooth hard finish of lacquer, varnish or enamel, with steel, setscrew type fittings. Use for general-purpose feeders and branchcircuits.

e. Flexible Steel Conduit: Single strip, continuous, flexibleinterlocked double-wrapped steel, hot dip galvanized inside and

out forming smooth internal wiring channel, with steel,compression type fittings. Use in dry locations only, connectionsto lighting fixtures in suspended ceilings, connections toequipment installed above suspended ceilings, transformerconnections, bus duct plug in units, and connections toequipment where vibration isolation is required, maximum length

Basis of Design of Mechanical Plumbing Vashon Island Library Expansion


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g. Rigid Nonmetallic Conduit: Schedule 40 polyvinyl chloride withsolvent cemented type fittings. Use in underground duct banks,below slab on grade, or embedded in floor slabs.

h. MC (metal clad) Cable: To help facilitate cost cutting, MC cablemay be used, from homerun j-box to device, rather than conduitand wire for branch circuiting. Homeruns shall remain as pipeand wire for future expansion flexibility.

6. Wire and Cable:

a. Provide 600V minimum insulation rating. Electrical gradeannealed copper, tinned if rubber insulated THHN/THWNinsulation. Stranded ASTM Class B. Minimum size number 12 forbranch circuits; number 14 for control wiring. All #12 and #10

AWG conductors shall be solid.

7. Wiring Devices:

a. Switches and receptacles shall be specification grade. Allswitches shall be silent acting fully rated 20 amperes. Multiplepole, 3 way, 4 way, and special purpose type switches shall beprovided as required. Special purpose receptacles shall beprovided as required by the equipment characteristics. Devicecoverplates shall be stainless steel

b. Branch circuits shall utilize steel EMT where concealed aboveceilings or within partitions, with flexible steel conduit at final

equipment connections. Non-metallic rigid conduit (PVC)embedded in floor slabs will be provided where the structureallows. Mechanical equipment final connections shall be liquidtight flexible steel conduit.

c. General-purpose duplex receptacles will be provided for cleaningand maintenance purposes at a maximum spacing of 25 feet, inrestrooms (GFI type) and within 25 feet of all mechanicalequipment.

d. Data and power wiring shall be installed and terminated tofurnitures internal wiring bus.

e. Provide dedicated branch circuit (hot & neutral; HR ground maybe shared) for up to (4) duplex receptacles serving work station

ff ( &


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Basis of Design of Mechanical, Plumbing, Vashon Island Library Expansion


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g , g,Fire Protection and Electrical Systems

y pVashon, WA

V. FIRE ALARM SYSTEM

A. GENERAL

1. The existing fire alarm control panel (located in the electrical room) andannunciator (located in the lobby main entrance) are part of a NotifierModel SFP-1024 system that was installed in 1999. Due to the age of thefire alarm control panel, the entire system will be replaced with a new toensure continued available of replacement components. All existingdevices are to be replaced with new.

2. Area-wide smoke detection is not provided within the existing buildingand is not required by the IBC because the building is equipped with anapproved automatic sprinkler system throughout; renovation will belimited to the placement of a few spot type detectors.

3. Sprinkler water flow and valve tamper alarms will not requirereplacement in this project; connect to the new fire alarm system.

4. The two manual fire alarm pull stations shall be replaced and relocatedto accommodate the remodeling and at least two new units will berequired at the addition exits.

5. Both audible and visual notification appliances will require replacementand physical relocation in the entry, Caf/Waiting Area, and Quite Study(Rooms 108, 109, and 111). Other areas may also be affected.

6. New audible/visual notification appliances will be required in the first floornorth and east additions, as well as in the Mechanical Loft space abovethe lobby.

7. Optionally, the Owner may direct that area-wide smoke detection beprovided as a form of early warning detection, as recommended by theproperty insurance carrier. If this level of additional detection is provided,beam type or aspirating smoke detection may be utilized in areas havinghigh ceilings and large volumes, such as a portion of the main entry

lobby (Room 108) Collections (Room 114) and Childrens collection(Room 112), to facilitate ease of testing and maintenance. Spot typesmoke detection shall be utilized for all other areas.

8. New area smoke detectors shall be provided in each new mechanical,electrical, and telephone equipment room.



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Fire Protection and Electrical Systems Vashon, WA

11. Acceptable Manufacturers: Honeywell Silent Knight. No substitutionsallowed.



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VI. LIGHTING SYSTEM

A. LIGHTING SYSTEM DESCRIPTION

1. All existing lighting will be removed and replaced.

2. Site Lighting - All Parking area light fixtures will remain. Low levelpathway lighting will be provided at the new pathway along the east ofthe building.

3. Interior Lighting Lighting will be designed to highlight the architectureand task areas while providing a highly energy efficient lighting system.Dimming ballasts will be used to maximize flexibility in light levels.

Workroom and Staff Areas Direct/Indirect lighting will be used toprovide ambient light levels and a low glare environment. Tasklights willprovide higher levels of light and will be equipped with occupancysensors to ensure automatic energy savings when workstations are notin use.

Collection Areas Indirect lighting will be used to provide ambient levelsof light. Large direct/indirect pendants will hang over Non-fiction andComputer area bringing emphasis to the existing structure and vaultedspace. Stack lighting will be provided by the owner at all library stacks.

Circulation Decorative Pendants will provide ambient light levels.Linear wall wash will highlight the wall behind circulation desks.

Study Rooms Wall mounted direct/ indirect fixtures will provide ambientand task lighting. Local dimmer switches will be provided for patronspersonal control of light levels.

Meeting Room A combination of indirect and direct fixtures will provideflexibility and multiple levels of light. Local dimmer switches will beprovided for control of light levels for presentations and to set mood forcommunity gatherings.

Childrens Area Recessed fixtures integrated with special ceilingsystem will provide high light levels as well as a sense of play andwhimsy.

4. Emergency egress lighting will be provided via battery back-up toachieve 0.1 fc min, 1 fc avg., 40:1 uniformity along path of egress.

Basis of Design of Mechanical, Plumbing,Fi P t ti d El t i l S t

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accommodate new lighting loads and to tie-into the existing lightingcontrol system. Local dimmer switches will be used in the Meeting Roomand Study Rooms.

8. Occupancy sensors (dual technology) will be provided for switch controlof individual offices, meeting rooms, restrooms, storage, mechanical &electrical.

B. LIGHTING SYSTEM GOALS MATRIX

1. The lighting systems are being designed in accordance with therecommendations of the Illuminating Engineering Society andWashington State Energy Code. The Lighting system will be designed tomeet the following goals and guidelines for each program area:

Area TargetIlluminance

Design Intent Lamp W/sf

Pathway General 1 fc Low level pathlighting will help

identify new pathway along eastside of the building.

CFL

LED

.15

Porch/Vestibule

General 5 fc Light fixtures integrated intobuilding overhangs and canopiesto light the ground andarchitectural features

FLMH

.5

Circulation/Self

Check-out

General 10 fcHighlight 30 fc

Pendant mount fixtures willprovide ambient lighting. Wall

wash fixtures with highlight wallbehind circulation desk.

CFLFL

1.3

Collection/Readingroom

General 20 fcStacklighting 50 fc

Indirect lighting will provideambient light levels. Pendantmount fixtures will provide featureelements and show off the heightof the space.

CFLFL

1.3

ChildrensCollection

General 20 fcTask 30 fc

Light fixtures integrated intoceiling system will be used to

create whimsy, provide high lightlevels and bring the scale of thespace down to childrens height.

CFLFL

1.3

Cyberbar/Computerarea

General 10 fc Light levels will be reduced atcyberbar and computer areas toensure proper viewing of

FL .8


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Area TargetIlluminance

Design Intent Lamp W/sf

Offices General 30 fcTask 50 fc

Pendant mount indirect lightfixtures will provide ambient lightlevels. Tasklights will be mountedat desks.

CFLFLLEDtask

1

StaffWorkroom

General 30 fc Direct/ Indirect pendant mountedfixtures will provide ambient lightlevels. Tasklights will be mountedat desks

FLLEDtask

1

Restrooms General 10 fcVanity 20fc

Even bright light levels will beprovided. Vanities will be lightedto a higher light level.

FL .8

Mechanical/Electricalrooms

General 30 fc Strip fluorescent light fixtures willbe evenly spaced aroundmechanical and electricalequipment

FL 1

Notes: Light levels shown in footcandles at work plane height. CFL indicated compact

fluorescent light sources, FL indicated linear fluorescent light sources, MH indicatedmetal halide sources, LED indicated LED light sources.


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SD ACOUSTICAL NARRATIVEVASHON LIBRARY

BCJ, PROJECT ARCHITECTS

November 8, 2010

INTRODUCTIONThe following document contains acoustical guidelines for the design of the Addition andRemodel of the Vashon Library. These recommendations are based on information from arecent meeting and on schematic documents.

RECOMMENDATIONS

ARCHITECTURALACOUSTICS

Architectural acoustics is generally the control of sound between spaces, and the creation ofthe desired acoustical characteristics within the various rooms. Within the Vashon Library,there are several spaces that will rely on the interior acoustic environment for noise control,and several adjacencies that will require special attention to provide proper acousticalseparation.

Surface Finishes

The ceiling surface is the most globally effective plane on which to locate absorptivesurfaces. Ceiling finishes in the Reading areas, Study rooms, Break rooms, Teens, andChildren should be absorptive, minimum NRC 0.65. Any number of finishes is available tomeet this specification.

Reading/Teens/Children

If wood slats is the desired aesthetic, the panels must be backed be backed with fiberglassabsorptive material. Black faced duct liner may be used as a backing material (1 duct liner,NRC 0.65).

Suggested products:Wood Grill Ceiling:

WoodCeilings. We recommend open area to be about 50% and depth of the slatsshould be equal or less than space between slats.

Louver Wood Ceiling by Conwed

Pinta Bioline

If recycled wood is used, the slats should be narrow. A slat of 1 with separationbetween is preferred. The wider the slat the more high frequency absorption that is lost.

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November 8, 2010

Meeting

The ceiling in the Meeting room should be left hard from the front row of seating to theprojection wall. The rest of the ceiling should be absorptive.

Absorptive wall panels are desirable on the rear wall between 3-0 from the floor and doorheight. These panels should be a minimum of 1 thick with a minimum NRC 0.80. The wideexpanse of glass on all of the walls is challenging. Providing some treatment on the smallsection of rear wall is essential.

Either prefabricated panels or a stretch wall system would be suitable on the wall surface,such as Wall Technology or Snap Tex. Panels should be 1 thick and have an NRC of0.80.

Sound Isolation

Audibility of intruding sound is dependent upon the amount of acoustic isolation provided bythe construction separating the two adjacent spaces and by the amount of backgroundsound in the receiving space. Individuals in rooms with higher background sound levels,typically produced by the HVAC system, are less able to hear intruding sounds. Conversely,those in rooms that are quieter can hear intruding sounds more easily. Determination ofappropriate wall types requires assumptions regarding expected sound levels in sourcerooms and background HVAC levels in receiving rooms. We used the following noisecriteria for the HVAC system as a design basis for wall type evaluation.

Space NC dBA

Toilet Rooms/Copy room 45 50Workroom 40 45General Library spaces 40 45Offices, Study rooms, Break rooms 35 40Meeting Room 30-35 40-45

The following table presents the suggested wall types for separation between various

adjacencies.

Source Receiver SourceSound

Description of Assembly *

Workroom Circulation Book sorting Type 3: 2 layers 5/8 GWB on each side

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November 8, 2010

Source Receiver SourceSound

Description of Assembly *

Teens Study room Raisedspeech

Type 2: 2 layers 5/8 GWB one sideand 5/8 GWB other side of 25 gauge 3-5/8 metal studs, R-11 in cavity**.

MeetingRoom

Library Lectures/Amplified

program

The sliding glass doors will need specialattention to provide adequate sound

isolation.Notes:

* These partitions should extend to the structure (at least one layer of GWB on each studside), preferably. Special ceiling treatment will be required if this is not possible.

** Solid core wood or filled core steel door with the following seals.

The frame to be grouted solid, or packed solid with safing insulation and

sealed airtight with acoustical sealant. The doorframe to be grouted solid byinstaller.

Provide the following door seals:

Head: Pemko 350CN, or equal

Jambs: Pemko 350CN, or equal

Bottom: Pemko 314AN, or equal

Threshold: Pemko 2005 with S2 silicon seal.Note that the doors should be sealed against hard floor (vinyl tile, linoleum,wood floor, etc.). Do not install the threshold over carpet.

Meeting

The mechanical system will be located in the crawl space under the Meeting room.Additional construction may be required at the Meeting room floor to sufficiently mitigate thesound of the mechanical equipment. Floor registers in the Meeting room may needadditional to be connected with heavier gage ductwork or the ducts may need to be boxed in

to prevent break-in noise from the equipment.

Teens and Childrens

Both of these areas have the potential of being higher noise level zones with teensth i f ft h l i li ti d hild th i f t t lli t

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The Childrens area is currently shown with bookcases defining the area. Where bookcasesare back to back, inserting a solid backing is useful for reducing sound transfer. The glasswall along the back limits the areas for absorption. Overstuffed or soft furniture in this areais desirable.


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PROJECT: VASHON LIBRARY ADDITION/MOD - BUILDING

LOCATION: VASHON ISLAND, WA

BLDG SF: 10,110

ESTIMATE: 2010176

EST TYPE: SCHEMATIC DESIGN

DIVISION DESCRIPTION TOTAL $/SF

A1010 STANDARD FOUNDATIONS 92,427 9.14

A1030 SLAB ON GRADE 13,762 1.36B1010 FLOOR CONSTRUCTION 66,440 6.57

B1020 ROOF CONSTRUCTION 150,549 14.89

B2010 EXTERIOR WALLS 73,924 7.31

B2020 EXTERIOR WINDOWS 192,848 19.07

B2030 EXTERIOR DOORS 20,300 2.01

B3010 ROOF COVERINGS 229,282 22.68

C1010 PARTITIONS 69,433 6.87

C1020 INTERIOR DOORS 19,400 1.92

C1030 FITTINGS 23,759 2.35

C3010 WALL FINISHES 54,890 5.43

C3020 FLOOR FINISHES 48,919 4.84

C3030 CEILING FINISHES 36,488 3.61

D2090 OTHER PLUMBING SYSTEMS 68,160 3.74

D3090 OTHER HVAC SYSTEMS & EQUIPMENT 249,975 24.73

D4090 OTHER FIRE PROTECTION SYSTEMS 44,074 4.36

D5010 ELECTRICAL SERVICE & DISTRIBUTION 117,768 11.65

D5020 LIGHTING & BRANCH WIRING 141,797 14.03D5030 COMMUNICATIONS & SECURITY SYSTEMS 84,075 8.32

E1090 OTHER EQUIPMENT 7,000 0.69

E2010 FIXED FURNISHINGS 70,958 7.02

F2010 BUILDING ELEMENTS DEMOLITION 66,315 6.56

Z1010 ADMINISTRATION 315,000 31.16

ESTIMATE SUBTOTAL 2,257,541 223.30


SUBTOTAL 2,426,857

GENERAL CONTRACTOR'S OH & P @ 6.50% 157,746SUBTOTAL 2,584,602


TOTAL 2,687,844 265.86

EXCLUSIONS

PROJECT: VASHON LIBRARY ADDITION/MOD - BUILDING

LOCATION: VASHON ISLAND, WA

BLDG SF: 10,110

ESTIMATE: 2010176

EST TYPE: SCHEMATIC DESIGN


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ITEM DESCRIPTION QUANTITY UNIT UNIT COST T OTAL $/SF

A1010 STANDARD FOUNDATIONS

02315 BACKFILL FOUNDATIONS 181 CY 8.00 1,448

02315 EXCAVATE FOUNDATIONS 223 CY 6.00 1,338

02315 HAUL EXCESS EXCAVATION 42 CY 12.00 504

02330 OVEREX. PLACE STRUCT. FILL,HAUL OVREX. 219 CY 40.00 8,760

02630 FOOTING DRAINS 254 LF 9.00 2,286

03000 COLUMN/PAD FTGS. 24 EA 130 3,120

03000 CONTINUOUS FTGS. 9 CY 360 3,24003100 10" FOUND. WALL POUR AGAINST EXTG. 252 SF 50.00 12,600

EPOXY DOWEL TO EXTG

03100 10" FOUNDATION WALLS 1,827 SF 28.50 52,070

03100 ACOUSTICAL WALL-MECH ROOM 256 SF 14.00 3,584

ALLOW

07130 WATERPROOF,INSUL,DRAINBOARD-FND & WALLS 1,159 SF 3.00 3,477

A1010 STANDARD FOUNDATIONS DIVISION TOTAL 92,427 9.14

A1030 SLAB ON GRADE

02315 GRAVEL AT SLABS 2,980 SF 0.55 1,639

03000 4" RAT SLAB 2,980 SF 3.50 10,430

03000 4" SLAB ON GRADE VESTBULE 130 SF 5.00 650

07260 VAPOR RETARDER AT SLABS 2,980 SF 0.35 1,043

A1030 SLAB ON GRADE DIVISION TOTAL 13,762 1.36

B1010 FLOOR CONSTRUCTION

06100 WOOD FLOOR STRUC,PLY,POSTS,BEAM,JOISTS,INSUL 3,380 SF 11.50 38,870

06110 MISC. PATCH EXTG. FLOOR STRUCT.-ALLOW 6,200 SFA 2.50 15,500

07150 FLASH EDGE,CLAD FLOOR OVERHANG SOFFIT 128 SF 15.00 1,920

AT CHILDRENS

07200 REPLACE INSULATION @ EXTG. FLOOR 6,200 SFA 1.25 7,750

09830 ACOUSTICAL FLOOR TREAT @ MECH ROOM FLOOR 400 SF 6.00 2,400

ALLOW

B1010 FLOOR CONSTRUCTION DIVISION TOTAL 66,440 6.57

B1020 ROOF CONSTRUCTION

05000 1/4" CONTINUOUS BENT PLATE 3,122 LF 12.00 37,464


06100 ROOF PLYWOOD 1-1/8" 5,690 SF 2.00 11,380

06180 MISC. BLOCKING,RIMS,FRAMING 5,690 SFA 0.55 3,130

B1020 ROOF CONSTRUCTION DIVISION TOTAL 150,549 14.89


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B2010 EXTERIOR WALLS

06100 PLYWOOD SHEAR WALL,2 LAYERS,STUDS 16" 416 SF 6.00 2,496

06100 WOOD PATCH @ EAVES FOR LIGHTS REMOVED 1 LS 2,500 2,500

ALLOW

07200 REPLACE INSULATION @ REMAINING EXT. WALLS 2,814 SF 0.85 2,392

07300 EXT WALL SYSTEM W/TRESPA 793 SF 49.00 38,857

INCL.INT VESTIBULE

07410 FRAME INFILL,CLAD NEW MONITORS 252 SF 28.00 7,056

07410 METAL CLAD INFILLS 112 SF 28.00 3,136

09250 INT.GWB AT EXTG. EXT. WALLS 2,814 SF 1.95 5,487

09900 EXTERIOR PAINTING/SEALING 1 LS 12,000 12,000

B2010 EXTERIOR WALLS DIVISION TOTAL 73,924 7.31

B2020 EXTERIOR WINDOWS

08250 REPLACEMENT WINDOWS @ EAST EXTG CLERESTORY 252 SF 50.00 12,600

08510 STEEL AND GLASS OVER EXTG.OPGS 72 SF 50.00 3,600

08520 ALUMINUM WINDOW WALL @ CHILDRENS 321 SF 50.00 16,05008520 CUSTOM WINDOW WALL @ GLULAMS 1,872 SF 51.00 95,472

INCL.INT VESTIBULE

08520 GLAZING @ MONITORS 114 SF 47.00 5,358

08520 REPLACEMENT WINDOWS 196 SF 50.00 9,800

08520 STRUCTURAL GLAZED WINDOW @ MTG. 396 SF 60.00 23,760

10705 EXTERIOR ELECTRIC VENETIAN SUNSHADES 728 SF 36.00 26,208

B2020 EXTERIOR WINDOWS DIVISION TOTAL 192,848 19.82

B2030 EXTERIOR DOORS

08100 EXT. HM DRS/FRMES/HRDWRE 5 EA 1,600 8,000

08400 GLAZED ENTRY DOORS-PER LEAF 4 EA 1,800 7,200

INCL.INT VESTIBULE

08400 NEW DOOR & SIDELITE @ MODIFIED OPG. 1 EA 2,600 2,600

08740 MISC.HARDWARE/ADA/ELECTRIC 1 LS 2,500 2,500

B2030 EXTERIOR DOORS DIVISION TOTAL 20,300 2.01

B3010 ROOF COVERINGS

07220 FOAM IN PLACE INSUL, CLOSED CELL R38 614 SF 4.75 2,917

AT NEW

07220 FOAMINPLACEINSUL,CLOSEDCELLR38 3,639 SF 4.75 17,285


09100 FURRING 10,373 SF 2.00 20,746

09250 GWB UNDERSIDE FOAM INSUL

Documents

Vashon Schematic Designs