EF90 Terminal Site Buildings Corpus Christi, Texas …beecroftconstruction.com/Plans/EF90/Addenda/EF90_addendum_004.pdf · B. Transverse-Load Capacity of Wall System: ... DIRTT Environmental

EF90 Terminal Site Buildings

Corpus Christi, Texas

Richter Architects #21303.00

ADDENDUM NO. 4 1

ADDENDUM NO. 4 ISSUED: January 9, 2014

RE: EF90 Terminal Site Buildings

Issued For Construction

Richter Architects #21303.00

FROM: Richter Architects

201 South Upper Broadway

Corpus Christi, Texas 78401

TO: Qualified Bidders

This Addendum forms a part of the original Contract Documents dated December 18, 2013. Work not

specifically deleted, modified, changed, or altered by this Addendum shall remain in effect as a part of the

Contract Documents.

This Addendum consists of ( ) pages.

ARCHITECTURAL

Incorporate the following specification section:

Section 102219 – Demountable Partition Systems (7 pages)

Reissue of the following specification section (shall replace original specification in its entirety):

Section 074213.53 – Metal Panels (8 pages)

END OF ADDENDUM NO. 4

16

EF-90 TERMINAL SITE BUILDINGS 09 JANUARY 2014

CORPUS CHRISTI, TEXAS

RICHTER ARCHITECTS #21303.00

DEMOUNTABLE PARTITION SYSTEMS 102219 - 1

SECTION 102219 - DEMOUNTABLE PARTITION SYSTEMS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and other Division 01 Specification Sections, apply to this Section

1.2 SUMMARY

A. Section includes double-glazed demountable partitions.

1. Related Requirements

a. Division 08 - Openings

b. Division 26 – Electrical:

c. Division 27 – Communications

d. Division 28 - Electronic Safety and Security

1.3 DEFINITIONS

A. Demountable parition systems include framing members, hardware, fasteners, anchors, glazing,

gaskets, panels, sealant, conduit, boxes, duplexes and all other components.

1.4 REFERENCES

A. AAMA 611-98 - Voluntary Standards for Anodized Architectural Aluminum.

B. ANSI/BIFMA X5.6-2003 - American National Standard for Office Furnishings.

C. ASCE 7-05 - Minimum Design Loads for Buildings and Other Structures.

D. ASTM E72-04- Method for Conducting Strength Tests of Panels for Building Construction.

E. ASTM E84-05 - Test Method for Surface Burning Characteristics of Building Materials.

F. ASTM E90-97- Method for Laboratory Measurement of Airborne Sound Transmission Loss of

Building Partitions and Elements.

G. ASTM E413-87- Classification for Rating Sound Insulation.

H. CAN/CSA-C22.2 No. 203-M91 (R2005 - Modular Wiring Systems for Office Furniture.

I. Limited Production Certification (LPC), Report No. LPCE 75090-1.

J. NFPA 70 – National Electrical Code, 2008 Edition.





K. UL 1286-2008 – Office Furnishings.

1.5 PERFORMANCE REQUIREMENTS

A. Structural Performance: Provide demountable partitions capable of withstanding the effects of

gravity loads and the following loads and stresses within limits and under conditions indicated:

B. Transverse-Load Capacity of Wall System: Lateral deflection of not more than 1/175 (glass

wall) of the overall span when tested under a uniformly distributed load of 0.24 kN/m2 (5 psf)

in accordance with ASTM E72 or calculated by registered engineer.

C. Provide miscellaneous bracing not shown on drawings.

D. Sound Transmission Loss for Moveable Solid Wall: ASTM E90, STC 44.

E. Fire-Test-Response Characteristics:

1. Surface-Burning Characteristics: Provide demountable partitions in accordance with

ASTM E84, with the following maximum characteristics:

a. Chromacoat MDF Panels: Meets Class B.

b. Fire Rated Chromacoat MDF: Meets Class A.

c. Pre-Finished Veneer on MDF: Meets Class C.

d. Fabric Wrapped MDF: Meets Class C.

1.6 ADMINISTRATIVE REQUIREMENTS

A. Division 01: Project management and coordination procedures.

B. Coordination:

1. Coordinate other work having a direct bearing on work of this section, including other

work required to be installed within or next to Work of this section.

C. Schedule:

1. Coordinate delivery of product in accordance with construction schedule to avoid storage

and double handling of the wall system.

2. Installation of wall system in conjunction with other trades after completion of HVAC

equipment, fire suppression, ceiling grid, finished drywall ceiling, floor covering, and

lighting fixtures. Final electrical connection, voice data/communications, ceiling tiles,

can be completed during or after installation of the wall systems.

1.7 SUBMITTALS

A. Product Data: Provide product information for each type of product indicated in this

specification.

B. Shop Drawings: Provide Shop Drawings for demountable partitions.

1. Include plans, elevations, sections, connection details, and attachment details to other

work.





2. Include critical field measurements for custom modular installation, including finished

width and height of partitions.

C. Samples: Provide samples for verification of each type of exposed finish required, in sample

size indicated below.

1. Panel Finish Face and Extrusion Components: Manufacturer's standard size unit, but not

less than 75 mm (3 inches) square.

2. Linear Trim: 300 mm (12 inches) long.

3. Door Face Finish: Manufacturer's standard sized unit, but not less than 75 mm (3 inches)

square.

4. Glazing: Manufacturer's standard sized unit, but not less than 75 mm (3 inches) square.

D. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified

testing agency, for each type of demountable partition.

E. Maintenance Data: Provide maintenance data for demountable partitions for incorporation into

operation and maintenance manuals.

1.8 QUALITY ASSURANCE

A. Sound Transmission Characteristics:

1. Where STC ratings are indicated, provide partitions with STC rating determined by

testing an identical system to ASTM E90 and classified in accordance with ASTM E413.

B. Electrical Components, Devices, and Accessories: Listed and labelled in accordance with

NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and

marked for intended use.

C. Mechanical Strength of Demountable Partitions: Provide demountable partitions capable of

withstanding static loads in accordance with ANSI/BIFMA X5.6.

D. Mock-Up:

1. Prior to installation of demountable partitions, build mock-up to verify selections made

under sample submittals.

2. Mock-up will demonstrate aesthetic effects and set quality standards for materials and

execution.

3. Approved mock-up may remain as part of the completed Work if undisturbed at time of

Substantial Completion.

1.9 REGULATORY REQUIREMENTS

A. Conform to TAS 2012 for accessibility requirements.

B. Conform to IBC 2009 for building code requirements.





1.10 PROJECT CONDITIONS

A. Environmental Limitations: Do not deliver or install demountable partition components until

building is enclosed and finishing operations are complete, including ceiling and floor-covering

installation and painting.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis of Design: DIRTT Environmental Solutions

B. Avanti Systems USA

C. Clestra Hauserman, Inc.

2.2 DEMOUNTABLE UNITIZED PANEL PARTITIONS

A. Glass Panels

1. Aluminum Double-Glazing Framing: Aluminum extrusions, 6063-T54 or 6061-T6

aluminum alloy.

2. Frame Finishes: Clear-anodized aluminum

3. Clear Anodized aluminum; AAMA 611, AA-M12C22A31, Class II.

4. Glazing: 10 mm thick; tempered safety glazing complying with CPSC 16 CFR 1201

Category II and ANSI Z97.1, Class A.

a. Finish: Clear

B. Frame Bases:

1. Provide frame bases with provisions for height adjustment to accommodate floor slab

variances.

2. Provide a leveling mechanism for making fine adjustment in height over adjustment

range of the product.

C. Connections and Supports: Manufacturer's standard connections and supports that connect and

release from floor and ceiling without damage using carpet grippers and ceiling track clips,

bulkhead (drywall ceiling), electrical or service feeds and physical connections to building

structure (where required).

D. Panel Joint Closure: Manufacturer's standard, capable of closing up to a 1 inch gap between

demountable partitions and base building elements.

E. Trim: Continuous and modular, factory-finished, snap-on type; adjustable for variations in floor

and ceiling levels.

1. Base Trim Profiles: Recessed; removable to access leveling mechanisms.

2. Ceiling Trim Profile: Recessed; adjustable to accommodate up to a 1/2 inch gap between

demountable partitions and base building elements.





3. Wall Trim Profile: Recessed; adjustable to accommodate up to a 1/2 inch up to 1 inch

gap between demountable partitions and base building elements.

4. Panel to Panel Profile: As detailed.

5. Colors: As selected by Architect from manufacturer's full range.

2.3 DOORS

A. Flush Wood Doors: Manufacturer's standard solid core door, pivot operation.

B. Door Thickness: 1-11/16 inches thick.

C. Material: Pressed high density fibreboard skin on both sides of door on particleboard core.

D. Edging: Solid edging, Plastic Laminate finish, Color to be selected by Architect from

manufacturer's full range.

E. Stile Width for Glazed Door: 6-3/16 inch

F. Door Height: 8- 0" (nominal)

G. Finish: Plastic Laminate finish, Color to be selected by Architect from manufacturer's full

range.

H. Hardware: Style and finish to be selected by Architect from manufacturer's full range.

I. Security System Components: Coordinated hardware requirements and prep work for security

system components (supplied by others).

2.4 DOOR FRAMES

A. Pivot Door Frames: Manufacturer's standard aluminum frame (single door and double door),

reversible, factory milled to receive hardware, for 1-11/16 inch +/- (1/16inch) doors. Door

frames capable of reconfiguration without part replacement or damage to wall components.

B. Frame Finishes: Clear-anodized aluminum; AAMA 611, AA-M12C22A31, Class I

1. Frame Color: As selected by Architect from manufacturer's full range.

C. Door Module Size: 8' -0" (nominal)

D. Configuration: Header, jambs and pivot hardware. Single door frame width not to exceed 44

inch wide module.

E. Hardware Reinforcement: milled, reinforce, drill and tap frames at factory to receive specified

hardware in accordance with the contract hardware schedule and templates.

F. Frame Height: Jambs shipped over length (height) by 2 inches, for field cutting to suit opening

height for proper alignment with adjacent frames.

G. Frame Preparation: Factory installed top pivot plate.





H. Electrical Requirements:

1. Security System Components: Coordinated hardware requirements and prep work for

security system components (supplied by others).

I. Factory notched and drilled jambs for ceiling track and manufacturer’s standard header

attachment.

J. Extrusion Profile: Rectilinear profile to match any adjacent unitized glass frames.

K. Seals: Manufacturer's standard.

L. Hardware: Manufacturer's full range of top and bottom pivot hardware, lever passage

sets/locksets and pulls.

1. Color/Finish: As selected by Architect from manufacturer's full range.

2.5 ACCESSORIES

A. Accessories and Brackets:

1. Manufacturer's brackets, supports and accessories for complete installation of system's

components and accessories.

2.6 FABRICATION

A. Demountable Unitized Panels:

1. Factory Assembled frames with 1inch insulation, base track and levelers; face mounted

tiles installed to frames on site.

2. Fabricate panels for installation with concealed fastening devices and pressure-fit

components that will not damage ceiling or floor covering exceptions.

3. Fabricate panels with continuous light-and-sound seals at floor, ceiling, and other

locations where panels abut fixed construction.

4. Factory glaze panels to the greatest extent possible.

B. Components:

1. Fabricate components for installation with concealed fastening devices and pressure-fit

members that will not damage ceiling, floor coverings and other building elements.

2. Fabricate for installation with continuous seals at floor and other locations where

partition assemblies abut fixed construction and for installation of sound attenuation

insulation in partition cavities.

3. Electrical, Communications, and Security System Components: Fabricate demountable

partitions to accept electrical, communications, and security systems components

specified in Division 26, 27, and 28.

2.7 FINISHES

A. Protect finishes on exposed surfaces from damage during shipping.

B. Appearance of Finished Work:





1. Variations in appearance of abutting or adjacent pieces are acceptable if they are within

one-half of the range of approved samples.

2. Noticeable variations in the same piece are not acceptable.

3. Variations in appearance of other components are acceptable if they are within the range

of approved samples and are assembled or installed to minimize contrast.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install demountable partition systems to manufacturer's written instructions.

B. Install system rigid, level, plumb, and aligned.

C. Apply finished face mounted tiles to framing.

D. Install continuous insulation in base trim cavity.

E. Install seals to prevent light and sound transmission at connections to floors, ceilings, fixed

walls, and abutting surfaces.

F. Install doors and frames, glazing, and glazing frame assemblies securely anchored to partitions

and with doors aligned and fitted.

G. Install and adjust door hardware for proper operation.

3.2 DEMONSTRATION

A. Engage a factory-authorized service representative to demonstrate and train Owner's

maintenance personnel to adjust, operate, and maintain demountable partitions.

3.3 END OF SECTION




METAL PANELS 074213.53 - 1

SECTION 074213.53 - METAL PANELS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes metal wall, soffit and fascia panels.

B. Related Sections:

1. Division 06 - "Rough Carpentry"

2. Division 07 - "Weather Barriers"

3. Division 07 - "Sheet Metal Flashing and Trim"

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include construction details, material descriptions, dimensions of individual components

and profiles, and finishes for each type of panel and accessory.

B. Shop Drawings:

1. Include fabrication and installation layouts of metal panels; details of edge conditions,

joints, panel profiles, corners, anchorages, attachment system, trim, flashings, closures,

and accessories; and special details.

2. Accessories: Include details of flashing, trim, and anchorage systems, at a scale of not

less than 1-1/2 inches per 12 inches.

C. Samples for Initial Selection: For each type of metal panel indicated with factory-applied color

finishes.

1. Include similar Samples of trim and accessories involving color selection.

D. Samples for Verification: For each type of exposed finish required, prepared on Samples of size

indicated below:

1. Metal Panels: 12 inches long by actual panel width. Include fasteners, closures, and other

metal panel accessories.





1.4 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer.

B. Product Test Reports: For each product, tests performed by a qualified testing agency.

C. Sample Warranties: For special warranties.

1.5 CLOSEOUT SUBMITTALS

A. Maintenance Data: For metal panels to include in maintenance manuals.

1.6 QUALITY ASSURANCE

A. Installer Qualifications: An entity that employs installers and supervisors who are trained and

approved by manufacturer.

B. UL-Certified, Portable Roll-Forming Equipment: UL-certified, portable roll-forming equipment

capable of producing metal panels warranted by manufacturer to be the same as factory-formed

products. Maintain UL certification of portable roll-forming equipment for duration of work.

C. Mockups: Build mockups to verify selections made under Sample submittals and to demonstrate

aesthetic effects and set quality standards for fabrication and installation.

1. Build mockup of typical roof eave, including fascia, and soffit as shown on Drawings;

approximately four panels wide by full eave width, including attachments and

accessories.

2. Approval of mockups does not constitute approval of deviations from the Contract

Documents contained in mockups unless Architect specifically approves such deviations

in writing.

3. Subject to compliance with requirements, approved mockups may become part of the

completed Work if undisturbed at time of Substantial Completion.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver components, metal panels, and other manufactured items so as not to be damaged or

deformed. Package metal panels for protection during transportation and handling.

B. Unload, store, and erect metal panels in a manner to prevent bending, warping, twisting, and

surface damage.

C. Stack metal panels horizontally on platforms or pallets, covered with suitable ventilated

covering. Store metal panels to ensure dryness, with positive slope for drainage of water. Do not

store metal panels in contact with other materials that might cause staining, denting, or other

surface damage.

D. Retain strippable protective covering on metal panels during installation.





1.8 FIELD CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather

conditions permit assembly of metal panels to be performed according to manufacturers' written

instructions and warranty requirements.

1.9 COORDINATION

A. Coordinate metal panel installation with rain drainage work, flashing, trim, construction of

walls, and other adjoining work to provide a leak-proof, secure, and noncorrosive installation.

1.10 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or

replace components of metal panel systems that fail in materials or workmanship within

specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including rupturing, cracking, or puncturing.

b. Deterioration of metals and other materials beyond normal weathering.

2. Warranty Period: Five years from date of Substantial Completion.

B. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer

agrees to repair finish or replace metal panels that show evidence of deterioration of factory-

applied finishes within specified warranty period.

1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:

a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.

b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.

c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Finish Warranty Period: 20 years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Structural Performance: Provide metal panel systems capable of withstanding the effects of the

following loads, based on testing according to ASTM E 1592:

1. Wind Loads: As indicated on Drawings.

2. Deflection Limits: For wind loads, no greater than 1/240 of the span.





B. Thermal Movements: Allow for thermal movements from ambient and surface temperature

changes by preventing buckling, opening of joints, overstressing of components, failure of joint

sealants, failure of connections, and other detrimental effects. Base calculations on surface

temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change (Range): 120 deg F.

2.2 METAL SOFFIT AND FASCIA PANELS

A. General: Provide metal soffit and fascia panels designed to be installed by lapping and

interconnecting side edges of adjacent panels and mechanically attaching through panel to

supports using concealed fasteners in side laps. Include accessories required for complete

installation.

B. Metal Soffit and Fascia Panels: MBCI “Artisan” Series, 8” wide profile, galvalume substrate in

guage thickness required to comply with all applicable code requirements for the project

location.

1. Finish: Selected by Architect from manufacturer's full range.

2. Fascia: Orientation to be horizontal.

2.3 METAL WALL PANELS

A. General: Provide metal wall panels designed to be installed by lapping and interconnecting side

edges of adjacent panels and mechanically attaching through panel to supports using concealed

fasteners in side laps. Include accessories required for complete installation.

B. Metal Wall Panels: MBCI “FW-120-0” Series, 12” wide profile, galvalume substrate in gauge

thickness required to comply with all applicable code requirements for the project location.

1. Finish: Selected by Architect from manufacturer's full range.

2.4 MISCELLANEOUS MATERIALS

A. Miscellaneous Metal Sub-framing and Furring: ASTM C 645, cold-formed, metallic-coated

steel sheet, ASTM A 653/A 653M, G90 coating designation or ASTM A 792/A 792M,

Class AZ50 aluminum-zinc-alloy coating designation unless otherwise indicated. Provide

manufacturer's standard sections as required for support and alignment of metal panel system.

B. Panel Accessories: Provide components required for a complete, installed panel system

including trim, clips, flashings, sealants, gaskets, fillers, closure strips, and similar items. Match

material and finish of metal panels unless otherwise indicated.

1. Closure Strips: Closed-cell, expanded, cellular, rubber or cross-linked, polyolefin-foam

or closed-cell laminated polyethylene; minimum 1-inch thick, flexible closure strips; cut





or pre-molded to match metal panel profile. Provide closure strips where indicated or

necessary to ensure completed construction.

C. Flashing and Trim: Provide flashing and trim formed from same material as metal panels as

required to seal against weather and to provide finished appearance. Finish flashing and trim

with same finish system as adjacent metal panels.

D. Panel Fasteners: Self-tapping screws designed to withstand design loads.

E. Panel Sealants: Provide sealant types recommended by manufacturer that are compatible with

panel materials, are non-staining, and do not damage panel finish.

1. Sealant Tape: Pressure-sensitive, 100 percent solids, gray poly-isobutylene compound

sealant tape with release-paper backing. Provide permanently elastic, non-sag, nontoxic,

non-staining tape 1/2 inch wide and 1/8 inch thick.

2. Joint Sealant: ASTM C 920; elastomeric polyurethane or silicone sealant; of type, grade,

class, and use classifications required to seal joints in metal panels, and as recommended

in writing by metal panel manufacturer.

3. Butyl-Rubber-Based, Solvent-Release Sealant: ASTM C 1311.

2.5 FABRICATION

A. General: Fabricate and finish metal panels and accessories at the factory, by manufacturer's

standard procedures and processes, as necessary to fulfill indicated performance requirements

demonstrated by laboratory testing. Comply with indicated profiles and with dimensional and

structural requirements.

B. On-Site Fabrication: Subject to compliance with requirements of this Section, metal panels may

be fabricated on-site using UL-certified, portable roll-forming equipment if panels are of same

profile and warranted by manufacturer to be equal to factory-formed panels. Fabricate

according to equipment manufacturer's written instructions and to comply with details shown.

C. Provide panel profile, including major ribs and intermediate stiffening ribs, if any, for full

length of panel.

D. Fabricate metal panel joints with factory-installed captive gaskets or separator strips that

provide a tight seal and prevent metal-to-metal contact, and that minimize noise from

movements.

E. Sheet Metal Flashing and Trim: Fabricate flashing and trim to comply with manufacturer's

recommendations and recommendations in SMACNA's "Architectural Sheet Metal Manual"

that apply to design, dimensions, metal, and other characteristics of item indicated.

1. Form exposed sheet metal accessories that are without excessive oil canning, buckling,

and tool marks and that are true to line and levels indicated, with exposed edges folded

back to form hems.

2. Seams: Fabricate nonmoving seams in accessories with flat-lock seams. Tin edges to be

seamed, form seams, and solder.





3. Sealed Joints: Form non-expansion, but movable, joints in metal to accommodate sealant

and to comply with SMACNA standards.

4. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not

allowed on faces of accessories exposed to view.

5. Fabricate cleats and attachment devices from same material as accessory being anchored

or from compatible, noncorrosive metal recommended in writing by metal panel

manufacturer.

a. Size: As recommended by SMACNA's "Architectural Sheet Metal Manual" or

metal soffit panel manufacturer for application but not less than thickness of metal

being secured.

2.6 FINISHES

A. Protect mechanical and painted finishes on exposed surfaces from damage by applying a

strippable, temporary protective covering before shipping.

B. Appearance of Finished Work: Variations in appearance of abutting or adjacent pieces are

acceptable if they are within one-half of the range of approved Samples. Noticeable variations

in same piece are not acceptable. Variations in appearance of other components are acceptable

if they are within the range of approved Samples and are assembled or installed to minimize

contrast.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with

requirements for installation tolerances, metal panel supports, and other conditions affecting

performance of the Work.

1. Examine framing to verify that girts, angles, channels, studs, and other structural panel

support members and anchorage have been installed within alignment tolerances required

by metal panel manufacturer.

2. Examine sheathing to verify that sheathing joints are supported by framing or blocking

and that installation is within flatness tolerances required by metal panel manufacturer.

a. Verify that air- or water-resistive barriers been installed over sheathing or backing

substrate to prevent air infiltration or water penetration.

B. Examine roughing-in for components and systems penetrating metal panels to verify actual

locations of penetrations relative to seam locations of metal panels before installation.

C. Proceed with installation only after unsatisfactory conditions have been corrected.





3.2 PREPARATION

A. Miscellaneous Supports: Install sub-framing, furring, and other miscellaneous panel support

members and anchorages according to ASTM C 754 and metal panel manufacturer's written

recommendations.

1. Soffit Framing: Clip and /or mechanically fasten furring channels to supports, as required

to comply with requirements for assemblies indicated.

3.3 METAL PANEL INSTALLATION

A. General: Install metal panels according to manufacturer's written instructions in orientation,

sizes, and locations indicated. Install panels perpendicular to supports unless otherwise

indicated. Anchor metal panels and other components of the Work securely in place, with

provisions for thermal and structural movement.

1. Shim or otherwise plumb substrates receiving metal panels.

2. Flash and seal metal panels at perimeter of all openings. Fasten with self-tapping screws.

Do not begin installation until air- or water-resistive barriers and flashings that will be

concealed by metal panels are installed.

3. Install screw fasteners in predrilled holes.

4. Locate and space fastenings in uniform vertical and horizontal alignment.

5. Install flashing and trim as metal panel work proceeds.

6. Locate panel splices over, but not attached to, structural supports. Stagger panel splices

and end laps to avoid a four-panel lap splice condition.

7. Provide escutcheons for pipe- and conduit-penetrating panels.

B. Fasteners:

1. Steel Panels: Use stainless-steel fasteners for surfaces exposed to the exterior; use

galvanized-steel fasteners for surfaces exposed to the interior.

C. Metal Protection: Where dissimilar metals contact each other or corrosive substrates, protect

against galvanic action as recommended in writing by metal panel manufacturer.

D. Lap-Seam Metal Panels: Fasten metal panels to supports with fasteners at each lapped joint at

location and spacing recommended by manufacturer.

1. Apply panels and associated items true to line for neat and tight enclosure.

2. Provide metal-backed washers under heads of exposed fasteners bearing on weather side

of metal panels.

3. Locate and space exposed fasteners in uniform vertical and horizontal alignment. Use

proper tools to obtain controlled uniform compression for positive seal without rupture of

washer.

4. Install screw fasteners with power tools having controlled torque adjusted to compress

washer tightly without damage to washer, screw threads, or panels. Install screws in

predrilled holes.

E. Watertight Installation:





1. Apply a continuous ribbon of sealant or tape to seal lapped joints of metal panels, using

sealant or tape as recommend by manufacturer on side laps of nesting-type panels and

elsewhere as needed to make panels watertight.

2. Provide sealant or tape between panels and protruding equipment, vents, and accessories.

3. At panel splices, nest panels with minimum 6-inch end lap, sealed with sealant and

fastened together by interlocking clamping plates.

F. Accessory Installation: Install accessories with positive anchorage to building, and provide for

thermal expansion. Coordinate installation with flashings and other components.

1. Install components required for a complete metal panel system including trim, corners,

seam covers, flashings, sealants, gaskets, fillers, closure strips, and similar items. Provide

types indicated by metal panel manufacturer; or, if not indicated, provide types

recommended by metal panel manufacturer.

G. Flashing and Trim: Comply with performance requirements, manufacturer's written installation

instructions, and SMACNA's "Architectural Sheet Metal Manual." Provide concealed fasteners

where possible, and set units true to line and level as indicated. Install work with laps, joints,

and seams that are permanently watertight.

1. Install exposed flashing and trim that is without buckling, and tool marks, and that is true

to line and levels indicated, with exposed edges folded back to form hems. Install sheet

metal flashing and trim to fit substrates and to achieve waterproof performance.

2. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space

movement joints at a maximum of 10 feet with no joints allowed within 24 inches of

corner or intersection. Where lapped expansion provisions cannot be used or would not

be waterproof, form expansion joints of intermeshing hooked flanges, not less than 1 inch

deep, filled with mastic sealant (concealed within joints).

3.4 CLEANING AND PROTECTION

A. Remove temporary protective coverings and strippable films, if any, as metal panels are

installed unless otherwise indicated in manufacturer's written installation instructions. On

completion of metal panel installation, clean finished surfaces as recommended by metal panel

manufacturer. Maintain in a clean condition during construction.

B. After metal panel installation, clear weep holes and drainage channels of obstructions, dirt, and

sealant.

C. Replace metal panels that have been damaged or have deteriorated beyond successful repair by

finish touchup or similar minor repair procedures.

END OF SECTION 074213.53