Part 2.Roberts Power Point Pdf

Green Roof Design and Construction an introduction

California Center for Sustainable Energy September 15, 2009

Robert Thiele, Architect A.I.A. LEED AP

Wednesday, September 9, 2009

Arid Climate Naturechalk dudleya

succulent

peddlescollectingwater

storage

living

water



The Living Building

Harvest all its own energy and water

Adapted to climate and site

Operates pollution free

Promotes health and well-being

Comprised of Integrated Systems

Is Beautiful


James Hubbell

1971my school of the organicsWednesday, September 9, 2009

Paolo Soleri

ArcosantiCortez Junction,

Arizona

solar architecture

arc-ologyarchitecture and ecology 1973

2003

1973


Cristo

Umbrellas Project

1991


1978large overhangs for sun and rain

my first commission


styles change

GREEN ROOFS


Green Roofs embody the spirit of green building


2050San Diego’s Climate Change


Green Roofs For An Arid Coastal Climate

Stormwater Management to protect against erosion


Green Roof on Historic Structure

Cave Store, La Jolla


Create Urban Roof Top Access


Urban Roof Tops

Creating new real estate


Creating Access

Urban Roof Tops


LOW IMPACT DEVELOPMENT

STORMWATER MANAGEMENT

BIOSWALES

INFILTRATION

L.I.D.

GREEN ROOFS

RAINWATER HARVESTING



Green Roofs: Beautiful and Innovative Solutions to Stormwater Pollution

A green roof is a contained green space on top of a human-made structure

below, above or at grade.


La Jolla Marine Reserve

ASBSArea of Special Biological

Significance

Green Roofs on homes and Bio-swales in

median, parkways and landscaped areas could filter storm water and

reduce pollution


Bio-Swales and Green Roofs


Rainwater Harvesting


GREEN ROOFS


Academy of Science, San Francisco

Green Roofs


Green Roofs - Cooling Los Angeles A Resource Guide

Environmental Affairs Department City of Los Angeles

200 N. Spring Street., Suite 2005 Los Angeles, CA 90012

2006

Green Roofs Los Angeles


Green Roofs in San Diego

Alternate Means and MethodsPermit Process

2008Wednesday, September 9, 2009


Standards and Codes


ASTM Standards

E 2397 Standard Practice for Determination of Deed Loads and Live Loads

E 2396 Standard Practice Saturated Water Permeability of Granular Drainage Media

E 2398 Standard Test Method for Water Capture and Media Retention or Geocomposite Drain Layers

E 2399 Maximum Media Density for Dead Load Analysis

E 2400 Selection, Installation and Maintenance

Green Roof Systems

*

*

*


Building Codes

Section 1607.11.2.3 Landscaped Roofs

Section 1611A Rain Loads

Section 1004.1.1 Occupancy Loading

Table

Non-Occupied Green Roofs Occupied Green Roofs

Section 1009.11.1Stairways & Roof

Access


Building Permits for Green Roofs

are Required

Life Safety Issues

Structural Issues



Live Loads

Dead Loads

20 psf

Non-occupied 3” extensive roof

roof framing assembly

maintenance worker

14 psf

green roof assembly 20 psf

Total Dead & Live Loads 54 psf

snow, rain, wind, people, maintenance, machinery

Green Roof Design Construction

Superlite Green Roof


Live Loads

Dead Loads

40 psf

Residential occupied extensive roof


residential deck

14 psf

3” green roof assembly 20 psf


stepping stones 6 psf





Live Loads

Dead Loads

60 psf

Commercial occupied extensive roof


commercial deck

14 psf

3” green roof assembly 20 psf


stepping stones 6 psf

Green Roof Design Construction Wednesday, September 9, 2009

First Order of Design Decisions

Determine Type of Green Roof

Determine Size of Occupancy

Degree of Accessibility

Extensive, Semi-Intensive or Intensive

Influences cost

Non Occupied or Occupied


Structural Issues


Is this an extensive or an intensive green roof? 1.

Benefits

low water plants

saves energy

collects storm water

looks good

2”- 6” deep

shallow

Benefitsgrows food

plus

grows larger plants

6” and deeper

deep

Extensive Intensive



fall protection provided

OCCUPIED ROOF

access

42” high guardrail required

plan view

stair access

NON-OCCUPIED ROOF

plan view

fall protection training required

maintenance workers

ladder access

occupied or non-occupied green roof?2.

Green Roof Design Construction Wednesday, September 9, 2009

3. Can the structure support the loads ?

No Occupancy

roof 54.23 psf dead and live load

lateral loads

seismicsheer

3” Ultra Extensive Green Roof System Dead and Live Loads

Roof Membrane & Structure Dead Loads

Landscaped Roof Live Loads 20 psf

13.85 psf

20.38 psf

vertical loads

54.23 psf



4. Structural Retrofit

No Occupancy

lateral loads

seismicsheer

vertical loads



Section

ElevationFlat Roofs

0 in 12 slope to 7 degrees

The possibilities ?

Class A Roof under

water retention barrels



Section

ElevationLow Sloped Roofs

1.5 in 12 slope 7 degrees

Class A Roof underTruss


1.5 in 12 slope 7 degrees



Section

ElevationSloped Roof

4 in 12 slope

Class A Roof underTruss


vegetated

geo-tech fabric



Typical structural failures

Structural Collapse

Hire a structural engineer, don’t guess

pondinglateral support failure

drainage failure



Roof Drainage

Minimum slope = 1/4” / ft or 2% to drain

Rain Water Loads if Drain Clogs

R = 5.2 (ds + dh)

Roof Drains and Secondary Roof Overflows

Ponding in heavy rainfall is the concern

roof planponding

Secondary Overflow

blocked roof drain

roof drainage


elevation



Drainage and overflow



CAL-OSHA Section 1926.501 Duty to Have Fall Protection

Section 1926.503 Fall Protection Training Required

NON-OCCUPIED ROOF

plan view


maintenance workers

ladder access

You are required to have Fall Protection

Training andinsurance for

all maintenance workers

Safety - Fall Protection

>15’ high



fall protection provided

OCCUPIED ROOF

access

42” high guardrail required

plan view

stair access

Safety - Fall Protection



SPRISingle Ply Roofing Industry

Fire Design Standards for Green Roofs

“Class A” UL rating maintained

18”

plan

elevation

18” - 36” non vegetated boundary

Fire Protection

irrigation

succulent plant pallet( avoid grasses )

Determine fire risk zoneCity or County of San Diego

Green Roof Design and Construction


Fire Protection 18” non vegetated boundarydrought tolerant sedum irrigation system

Class “A” roof assembly

Green Roof Design and Construction Wednesday, September 9, 2009

Operations Plan

Fall Protection Plan

Fall Protection Training

NON-OCCUPIED ROOF

plan view


maintenance workers

ladder access

Maintenance Manual



GREEN ROOF CONSTRUCTION

CASE STUDY


Green Roof Construction 101

Re-roof - maintain existing 1 hr Class Roof A


TPO membrane 60 mil

Green Roof Construction 101


CCW 200 moisture retention mat (gray)

CCW MiraDRAIN GR9200 drainage board (black)


Green Roof Construction 101Wednesday, September 9, 2009


GREEN ROOF COSTSand BENEFITS


CLIENT NAME

ADDRESS

TELEPHONE

GREEN ROOF TEMPLATE <5000 SQ FT

COST UNIT AREA

SCOPE OF WORK

REROOF / TEAR OFF 3,736.00$ 2.00$ 1868

2" RIGID INSULATION AS REQUIRED 3,269.00$ 1.75$ 1868

TPO 60 mil MEMBRANE 14,944.00$ 8.00$ 1868

3" ULTRA EXTENSIVE SYSTEM 41,096.00$ 22.00$ 1868

SUBTOTAL 63,045.00$

STRUCTURAL ENGINEER / PLANS 3,736.00$ 2.00$ 1868

ARCHITECT -$ 1868

PERMIT 1,868.00$ 1.00$ 1868

TOTAL COST 68,649.00$ 36.75$ 1868

NIC - STRUCTURAL RETROFIT

GREEN ROOF COSTS


Benefits



Green Roofs and Graywater



SUSTAINABILITY


Sustainable Design = neutral, 100% less bad

Restorative Design



GREEN ROOF PLANTS



David Solmes, Landscape Architect Paul Kephart, Rana Creek

Plants


dudleya pulverulentaChalk Dudleya

dudleya edulis

PLANT LIST #1 California Nativies

senecio serpensblue chalk iceplant

senecio serpens

Plants


Green Roofs in Arid Climates


Plants

opuntia littoralis

nassella cernuanodding neddlegrass

blue eyed grass

prickly pear

melica imperfectaonion grass

sisyrinchium bellum


Plants

sphaeralgea ambiguadesert mallow

euphorbia miseracliff spurge

purple three awn

allium haematochiton

red skin onion

artemisia ludoviciana

silver wormwood

baileya multiradiata

desert marigold


Plants

eriophyllum confertiflorumgolden yarrow

helianthemum scoparium

sunrose

camissonia cheiranthifolia

beach primrose

common yarrow

achillea millefolium common yarrow

lessingia filaginifoliaCalifornia aster


GREEN BUILDING PROGRAMS


LEED

SUSTAINABLE SITES

STORMWATER DESIGN

Leadership in Energy and Environmental Design

ENERGY AND ATMOSPHERE


Green Roof Resources

Green Roofs for Healthy Cities


Note: This is not a complete program

Robert Thiele, Architect A.I.A. LEED AP









Technology

Part 2.Roberts Power Point Pdf