36C78618R0312-004.pdf

12-01-15

ROUGH CARPENTRY

06 10 00 - 1

SECTION 06 10 00

ROUGH CARPENTRY

PART 1 - GENERAL

1.1 DESCRIPTION

A. Section specifies wood blocking, sheathing, furring, nailers, and rough hardware.

1.2 RELATED WORK

A. NA

1.3 PERFORMANCE REQUIREMENTS

B. Engineered Wood Products:

1. Provide products with no added urea formaldehyde; determine formaldehyde concentrations in air from wood products under test conditions of temperature and relative humidity in accordance with

ASTM D6007 or E1333.

2. Bio-based Content:

a. Interior Panels: Engineered products designed specifically for interior applications and providing a surface that is impact-, scratch-, and wear-resistant and that does not absorb or retain moisture; provide minimum 55 percent bio-based content.

b. Structural Interior Panels: Engineered products designed for use in structural construction applications; provide minimum 89 percent bio-based content.

c. Structural Wall Panels: Engineered products designed for use in structural walls, curtain walls, floors and roofs; provide minimum 94 percent bio-based content.

3. VOC Emissions:

a. Provide low VOC products with Green Seal Certification to GS-36 and description of the basis for certification

1.4 SUSTAINABILITY REQUIREMENTS

A. Materials in this section may contribute towards contract compliance with sustainability requirements.

B. Biobased Material: For products designated by the USDA’s BioPreferred® program, provide products that meet or exceed USDA recommendations for biobased content, subject to the products compliance with performance requirements in this Section. For more information regarding the product categories covered by the BioPreferred® program, visit http://www.biopreferred.gov.

http://www.biopreferred.gov/

06 10 00 - 2

1.5 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Provide documentation of conformance with performance requirements of this section.

C. Prepare shop drawings showing framing connection details, fasteners, connections and dimensions.

1.6 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Protect lumber and other products from dampness both during and after delivery at site.

B. Pile lumber in stacks in such manner as to provide air circulation around surfaces of each piece.

C. Stack plywood and other board products so as to prevent warping.

D. Locate stacks on well drained areas, supported at least 150 mm (6 inches) above grade and cover with well-ventilated sheds having firmly constructed over hanging roof with sufficient end wall to protect lumber from driving rain.

1.7 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text by the basic designation only. Comply with applicable provisions and recommendations of the following, except as otherwise shown or specified.

B. American Forest and Paper Association (AF&PA):

Wood Structural Design Data

C. American Lumber Standard Committee, Incorporated (ALSC):

ALSC Board of Review

D. American National Standards Institute (ANSI):

ANSI A190.1-2012 Structural Glued Laminated Timber

E. American Plywood Association (APA):

E30-2011 Engineered Wood Construction Guide

F. American Society of Mechanical Engineers (ASME):

B18.2.1-2012 Square, Hex, Heavy Hex and Askew Head Bolts and

Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag

Screws

B18.2.2-2010 Hex Nuts for General Applications

B18.6.1-81 (R2008) Wood Screws

B18.6.4-98(R2005) Thread Forming and Thread Cutting Tapping

Screws and Metallic Drive Screws

06 10 00 - 3

G. American Society for Testing and Materials (ASTM):

A307-10 Carbon Steel Bolts and Studs, 60,000 PSI

Tensile Strength

C954-11 Steel Drill Screws for the Application of

Gypsum Panel Products or Metal Plaster Bases to

Steel Studs from 0.033 in. (0.84 mm) to 0.112

in. (2.84 mm) in Thickness

C1002-07 Steel Self-Piercing Tapping Screws for the

Application of Gypsum Panel Products or Metal

Plaster Bases to Wood Studs or Steel Studs

D6007-02 Determining Formaldehyde Concentration in Air from Wood Products Using a Small Scale Chamber

E1333-10 Determining Formaldehyde Concentrations in Air and Emission Rates from Wood Products Using a

Large Chamber

F844-07a Washers, Steel, Plan (Flat) Unhardened for

General Use

F1667-11ae1 Nails, Spikes, and Staples

H. American Wood Protection Association (AWPA)

I. FM Global Group (FM):

FM 4435 Approval Standard for Edge Systems Used with

Low Slope Roofing Systems

J. Green Seal (GS):

GS-36 (2013) Commercial Adhesives

K. South Coast Air Quality Management District (SCAQMD):

SCAQMD Rule 1168 (1989; R2005) Adhesive and Sealant Applications

L. U.S. Department of Commerce/National Institute of Science and

Technology:

PS 1-09 Structural Plywood

PS 20-10 American Softwood Lumber Standard

PART 2 - PRODUCTS

2.1 LUMBER

A. Unless otherwise specified, each piece of lumber to bear a grade mark, stamp, or other identifying marks indicating grades of material, and rules or standards under which produced.

1. Identifying marks in accordance with rule or standard under which material is produced, including requirements for qualifications and

06 10 00 - 4 authority of the inspection organization, usage of authorized identification, and information included in the identification.

2. Inspection agency for lumber approved by the Board of Review, American Lumber Standards Committee, to grade species used.

3. Design members and fastenings to conform to AITC Timber Construction

Manual. Coordinate to show structural properties on drawings of load bearing structural members.

B. Structural Members: Species and grade as listed in the AF&PA, National

Design Specification for Wood Construction having design stresses as shown.

C. Lumber Other Than Structural:

1. Unless otherwise specified, species graded under the grading rules of an inspection agency approved by Board of Review, American Lumber

Standards Committee.

2. Framing lumber: Minimum extreme fiber stress in bending of 1100.

3. Furring, blocking, nailers and similar items 100 mm (4 inches) and narrower Standard Grade; and, members 150 mm (6 inches) and wider, Number 2 Grade.

D. Sizes:

1. Conforming to Prod. Std. PS20.

2. Size references are nominal sizes, unless otherwise specified, actual sizes within manufacturing tolerances allowed by standard under which produced.

E. Moisture Content:

1. At time of delivery and maintained at the site.

2. Boards and lumber 50 mm (2 inches) and less in thickness: 19 percent or less.

3. Lumber over 50 mm (2 inches) thick: 25 percent or less.

F. Preservative Treatment:

1. Do not treat Heart Redwood and Western Red Cedar.

2. Products containing chromium or arsenic will not be permitted.

3. Provide products with waterborne or boron-based preservatives.

G. Waterborne Wood Preservatives:

1. Treat wood products with waterborne wood preservatives listed in

Section 4 of AWPA Standards U1, excluding those which contain arsenic and/or chromium.

2. Pressure treatment of wood products must conform to the requirements of AWPA Standards U1 and T1.

06 10 00 - 5

3. Retention of preservatives as prescribed in AWPA Standard U1 for the following Use Categories (material conforming to a higher AWPA Use

Category may be specified):

a. UC1: Interior construction - above ground, dry conditions.

b. UC2: Interior construction - above ground, damp conditions.

c. UC3A: Exterior construction - above ground, coated and with rapid water runoff.

d. UC3B: Exterior construction - above ground, uncoated or poor water runoff.

e. UC4A: General purpose soil or fresh water contact - heavy duty above ground.

f. UC4B: Heavy duty soil or fresh water contact - critical or difficult to replace components.

g. UC4C: Extreme duty soil or fresh water contact - critical structural components.

H. Boron-based Preservatives: Impregnate lumber with preservative treatment conforming to AWPA Standard U1.

I. Fire-retardant Treatment:

1. Fire-retardant-treated wood products to be free of halogens, sulfates, ammonium phosphate and formaldehyde.

2. Fire retardant treatment of wood products to conform to the requirements of AWPA Standard U1, Commodity Specification H and AWPA

Standard T1, Section H.

2.2 PLYWOOD

A. Comply with Prod. Std. PS 1 and APA E30.

B. Bear the mark of a recognized association or independent inspection agency that maintains continuing control over quality of plywood which identifies compliance by veneer grade, group number, span rating where applicable, and glue type.

C. Sheathing:

1. APA rated Exposure 1 or Exterior; panel grade CD or better.

2. Wall Sheathing:

a. Minimum 9 mm (11/32 inch) thick with supports 400 mm (16 inches) on center and 12 mm (15/32 inch) thick with supports 600 mm (24 inches) on center unless specified otherwise.

b. Minimum 1200 mm (48 inches) wide at corners without corner bracing of framing.

3. Roof Sheathing:

06 10 00 - 6

a. Minimum 15 mm (19/32 inch) thick or span rating of 40/20 or 18 mm

(23/32 inch) thick or span rating of 48/24 for supports 600 mm

(24 inches) on center.

2.3 ROUGH HARDWARE

A. Anchor Bolts: ASTM A307, size as indicated, complete with nuts and washers.

B. Washers:

1. ASTM F844.

2. Use zinc or cadmium coated steel or cast iron for washers exposed to weather.

C. Screws:

1. Wood to Wood: ANSI B18.6.1 or ASTM C1002.

2. Wood to Steel: ASTM C954, or ASTM C1002.

D. Nails:

1. ASTM F1667:

a. Common: Type I, Style 10.

b. Concrete: Type I, Style 11.

c. Barbed: Type I, Style 26.

d. Underlayment: Type I, Style 25.

e. Masonry: Type I, Style 27.

2.4 BLOCKING

A. General: Provide miscellaneous lumber as indicated and lumber support or attachment for other construction, including the following:

1. Blocking.

2. Nailers.

3. Furring.

B. Provide Standard or No. 2 Grade lumber.

2.5 Rough Carpentry Products shall comply with following standards for biobased materials:

Material Type Percent by Weight

Lumber 25 percent biobased material plywood 55 percent biobased material

The minimum-content standards are based on the weight (not the volume) of the material in the insulating core only.

06 10 00 - 7

PART 3 - EXECUTION

3.1 INSTALLATION OF FRAMING AND MISCELLANEOUS WOOD MEMBERS

A. Conform to applicable requirements of the following:

1. Comply with APA standards for installation of plywood.

B. Anchors in Masonry: Embed anchor bolts not less than 400 mm (15 inches) in masonry unit walls and provide each with a nut and a 50 mm

(2 inch) diameter washer at bottom end. Fully grout bolts with mortar.

C. Anchors in Concrete:

1. Embed anchor bolts not less than 200 mm (8 inches) in poured concrete walls and provide each with a nut and a 50 mm (2 inch) diameter washer at bottom end.

2. A bent end may be substituted for the nut and washer; bend to be not less than 90 degrees.

3. Powder-actuated fasteners spaced 900 mm (3 feet) o.c. may be provided instead of bolts for single thickness plates on concrete.

D. Sheathing:

1. Lay panels with joints staggered, with edge and ends 3 mm (1/8 inch) apart and nailed over bearings as specified.

2. Set nails not less than 9 mm (3/8 inch) from edges.

3. Install 50 mm by 100 mm (2 inch by 4 inch) blocking spiked between studs to support edge or end joints of panels.

E. Wood Roof Nailers, Edge Strips, Crickets, Curbs, and Cants: Provide sizes and configurations indicated or specified and anchored securely to continuous construction.

1. Roof Edge Strips and Nailers: Provide at perimeter of roof, around openings through roof, and where roofs abut walls, curbs, and other vertical surfaces.

2. Except where indicated otherwise, nailers to be 150 mm (6 inches) wide and the same thickness as the insulation. Anchor nailers securely to underlying construction.

3. Anchor perimeter nailers in accordance with FM 4435. Provide strips grooved for edge venting; install at walls, curbs, and other vertical surfaces with a 6 to 12 mm (1/4 to 1/2 inch) air space.

4. Crickets, Cants, and Curbs: Provide wood saddles or crickets, cant strips, curbs for scuttles and ventilators, and wood nailers bolted to tops of concrete or masonry curbs and at expansion joints, and at lumber and exterior plywood.

06 10 00 - 8

F. Wood Blocking: Provide proper sizes and shapes at proper locations for the installation and attachment of wood and other finish materials, fixtures, equipment, and items indicated or specified.

G. Wood Grounds: Provide for fastening wood trim, finish materials, and other items to plastered walls and ceilings. Install grounds in proper alignment and true with a 2400 mm (8 foot) straightedge.

H. Wood Furring:

1. Provide where shown and as necessary for facing materials specified.

2. Except as shown otherwise, furring strips to be nominal one by 3, continuous, and spaced 400 mm (16 inches) o.c. Erect furring vertically or horizontally as necessary.

3. Nail furring strips to masonry.

4. Do not use wood plugs.

5. Provide furring strips around openings, behind bases, and at angles and corners.

6. Furring to be plumb, rigid, and level and shimmed as necessary to provide a true, even plane with surfaces suitable to receive the finish required.

3.2 PROTECTION

A. Protect rough carpentry from weather.

B. If rough carpentry becomes wet, apply EPA-registered borate treatment complying with EPA registered label.

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02-01-16

07 01 50.19 - 1

SECTION 07 01 50.19

PREPARATION FOR RE-ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Complete roof removal for new roof system installation.

2. Partial roof removal for new roof system installation.

3. Roofing membrane and selective roofing system component removal for new roof membrane installation.

4. Existing roofing membrane preparation for new roofing, membrane, and system installation.

B. Existing Roofing System: as described in the SOW and/or drawings.

System components include:

1. Pavers and paver supports.

2. Aggregate ballast.

3. Roof insulation and drainage board.

4. Aggregate surfacing.

5. Roofing membrane.

6. Cover board.

7. Roof insulation.

8. Vapor retarder.

9. Substrate board.

1.2 RELATED REQUIREMENTS

A. Replacement Roof Deck and Parapet Sheathing: Section 06 10 00, ROUGH

CARPENTRY.

B. Sheet Metal Counterflashing: Section 07 60 00, SHEET METAL FLASHING AND

TRIM.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American National Standards Institute/Single-Ply Roofing Institute

(ANSI/SPRI):

1. FX-1-01(R2006) Standard Field Test Procedure for Determining the

Withdrawal Resistance of Roofing Fasteners.

C. American Society for Nondestructive Testing (ASNT):

1. SNT-TC-1A - Personnel Qualification and Certification for

Nondestructive Testing.

D. ASTM International (ASTM):

07 01 50.19 - 2

1. C208-12 - Cellulosic Fiber Insulating Board.

2. C578-17a - Rigid, Cellular Polystyrene Thermal Insulation.

3. C728-17a - Perlite Thermal Insulation Board.

4. C1177/C1177M-13 - Glass Mat Gypsum Substrate for Use as Sheathing.

5. C1153-10(2015) - Location of Wet Insulation in Roofing Systems Using

Infrared Imaging.

6. C1278/C1278M-17 - Fiber-Reinforced Gypsum Panel.

7. D4263-83(2012) - Indicating Moisture in Concrete by the Plastic

Sheet Method.

E. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

1. DOC PS 1-09 - Structural Plywood.

2. DOC PS 2-04 - Performance Standard for Wood-Based Structural-Use

Panels.

1.4 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting minimum 30 days before beginning Work of this section.

1. Required Participants:

a. Contracting Officer's Representative.

b. Design/build engineer (if re-roofing is design/build in the

SOW).

c. Inspection and Testing Agency.

d. Contractor.

e. Installer.

f. Manufacturer's field representative.

g. Other installers responsible for adjacent and intersecting work, including mechanical and electrical equipment installers.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Removal and installation schedule.

b. Removal and installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Removal and installation.

f. Temporary roofing including daily terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

07 01 50.19 - 3

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and installation details.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Description of temporary roof system and components.

3. List of patching materials.

4. Recover board fastening requirements.

5. Temporary roofing installation instructions and removal instructions.

1.6 QUALITY ASSURANCE

A. Installer Qualifications:

1. Same installer as the new roofing installer.

1.7 FIELD CONDITIONS

A. Building Occupancy: Perform work to minimize disruption to normal building operations.

1. Verify occupants are evacuated from affected building areas when working on structurally impaired roof decking above occupied areas.

2. Provide notice minimum 72 hours to COR before beginning activities affecting normal building operations.

B. Existing Roofing Available Information:

1. Examine available information before beginning work of this section.

C. Weather Limitations: Proceed with reroofing preparation only during dry weather conditions as specified for new roofing installation in its relevant specification section.

1. Remove only as much roofing in one day as can be made watertight in same day.

1.8 WARRANTY

A. See relevant roofing specification for required warranty.

07 01 50.19 - 4

PART 2 - PRODUCTS

2.1 MATERIALS

A. Patching Materials: Match existing roofing system materials.

B. Plywood Sheathing: See Section 06 10 00, ROUGH CARPENTRY.

C. Metal Flashing: See Section 07 60 00, SHEET METAL FLASHING AND TRIM.

D. Temporary Protection Materials:

1. Expanded Polystyrene (EPS) Insulation: ASTM C578.

2. Plywood: NIST DOC PS 1, Grade CD Exposure 1.

3. Oriented Strand Board (OSB): NIST DOC PS 2, Exposure 1.

E. Temporary Roofing System Materials: Contractor's option.

F. Fasteners: Type and size required by roof membrane manufacturer to resist wind uplift.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

C. Protect landscaping from damage.

D. Maintain access to existing walkways and adjacent occupied facilities.

E. Coordinate use of rooftop fresh air intakes with Contracting Officer's

Representative to minimize effect on indoor air quality.

F. Ensure temporary protection materials are available for immediate use in case of unexpected rain.

G. Ensure roof drainage remains functional.

1. Keep drainage systems clear of debris.

2. Prevent water from entering building and existing roofing system.

H. Coordinate rooftop utilities remaining active during roofing work with

Contacting Officer's Representative.

3.2 RE-ROOFING PREPARATION - GENERAL

A. Notify Contacting Officer's Representative of planned operations, daily.

1. Identify location and extent of roofing removal.

2. Request authorization to proceed.

3.3 OVERBURDEN REMOVAL

A. Remove aggregate ballast.

1. Store aggregate ballast for reuse.

B. Remove loose aggregate from bituminous membrane surface.

07 01 50.19 - 5

C. Remove pavers and paver support.

1. Store undamaged pavers and paver supports for reuse.

2. Dispose of damaged pavers.

D. Remove insulation, and drainage board from protected roofing membrane.

3.4 COMPLETE ROOFING SYSTEM REMOVAL (ASSUME FOR BIDDING PURPOSES, BUT

REFERENCE SOW AND/OR ANY DRAWINGS FOR FURTHER CLARIFICATION)

A. Remove existing roofing system completely, exposing structural roof deck.

1. Remove cover board, roof insulation, vapor retarder, and substrate board.

2. Remove or cut-off roofing system fasteners.

3.5 PARTIAL ROOFING SYSTEM REMOVAL (NOT APPLICABLE TO THIS PROJECT)

A. Remove existing roofing completely, exposing structural roof deck at locations and to extent indicated on drawings.

1. Remove cover board, roof insulation, vapor retarder, and substrate board.

2. Remove or cut-off roofing system fasteners.

3.6 ROOFING MEMBRANE AND SELECTIVE ROOFING SYSTEM COMPONENT REMOVAL (NOT

APPLICABLE TO THIS PROJECT)

A. Remove existing roofing membrane, only, in locations and to extent indicated on drawings.

B. Visually inspect cover board, roof insulation, vapor retarder, and substrate board for moisture immediately after roof membrane removal.

1. Coordinate with Contracting Officer's Representative to observe inspections.

2. Identify wet roofing system components required to be removed.

3. Mark roofing system removal locations and extents.

C. Remove wet roofing system components.

1. Remove or cut-off roofing system fasteners when removals expose structural roof deck.

D. Patch selective roofing system removals immediately after inspection and repair.

E. Install patching materials to match existing roofing system.

F. Patch roofing membrane to maintain building watertight, unless new roofing membrane is installed same day as removal and repair.

3.7 DECK PREPARATION

A. Inspect structural roof deck after roofing system removal.

07 01 50.19 - 6

1. Replace roof deck if stated as such in SOW and/or drawings.

B. Concrete Roof Decks:

1. Visually confirm concrete roof deck is dry.

2. Perform moisture test according to ASTM D4263 each day for each separate roof area.

a. Proceed with roofing work only when moisture is not observed.

C. Steel Roof Decks:

1. Visually inspect structural roof deck installation and fasteners.

a. Notify Contracting Officer's Representative of unsuitable conditions and inadequate fastenings potentially affecting roof system performance.

2. Secure roof deck with additional fastenings as recommended by roofing system manufacturer’s representative, manufacturer’s literature, and/or the design build engineer (if applicable).

3. Replace roof deck if stated as such in SOW and/or drawings.

a. Replacement Roof Deck: See Section 05 31 00, STEEL DECKING.

Section 06 10 00, ROUGH CARPENTRY.

3.8 TEMPORARY ROOFING

A. Install temporary roofing to maintain building watertight.

B. Remove temporary roofing before installing new roofing.

3.9 BASE FLASHING REMOVAL

A. Expose base flashings to permit removal.

1. Two-Piece Counterflashings: Remove cap flashing and store for reuse.

2. Single Piece Counterflashings: Carefully bend counterflashing.

3. Metal Copings: Remove decorative cap and store for reuse.

B. Remove existing base flashings.

1. Clean substrates to receive new flashings.

C. Replace counterflashings damaged during removal.

1. Counterflashings: See Section 07 60 00 SHEET METAL FLASHING AND

TRIM.

D. Remove existing parapet sheathing and inspect parapet framing.

1. Notify Contracting Officer's Representative of damaged framing.

E. Install pressure-preservative treated plywood sheathing, 15 mm

(19/32 inch) thick.

3.10 RECOVER BOARD INSTALLATION

A. Install recover boards over existing roof insulation roofing membrane with butted joints. Stagger end joints in adjacent rows.

07 01 50.19 - 7

B. Fasten recover boards to resist wind-uplift.

1. Fastening Requirements: See relevant specification section for new roofing type.

2. Uplift Resistance: Base on pull out resistance determined by specified field testing.

3.11 FIELD QUALITY CONTROL

A. Field Tests: Performed by testing laboratory specified in Section

01 45 29, TESTING LABORATORY SERVICES.

1. Fastener Pull Out Tests: ANSI/SPRI FX-1 and at recommended frequency.

B. Existing Roofing System Warrantor Services:

1. Inspect reroofing preparation and roofing installation to verify compliance with existing warranty conditions.

2. Submit reports of field inspections, and supplemental instructions issued during inspections.

3.12 DISPOSAL

A. Collect waste materials in containers.

B. Remove waste materials from project site, regularly, to prevent accumulation.

C. Legally dispose of waste materials.

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06-01-14

ROOF AND DECK INSULATION

07 22 00 - 1

SECTION 07 22 00

ROOF AND DECK INSULATION

PART 1 - GENERAL

1.1 DESCRIPTION

A. Installation of roof and deck insulation, and vapor retarder on new construction ready to receive roofing or waterproof membrane.

B. Repairs and alteration work to existing roof insulation.

1.2 RELATED WORK

B. Wood blocking and edge strips: Section 06 10 00, ROUGH CARPENTRY.

E. Sheet metal components: Section 07 60 00, FLASHING AND SHEET METAL.

1.3 QUALITY CONTROL

A. Supervision of work by persons that are knowledgeable and experienced in roofing. See submittals for documentation of supervisor’s qualification.

B. Unless specified otherwise, comply with the recommendations of the NRCA

"Roofing and Waterproofing Manual" applicable to insulation for storage, handling, and application.

1.4 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Asphalt materials, each type

2. Roofing cement, each type

3. Roof insulation, each type

4. Fastening requirements

5. Insulation span data for flutes of metal decks

C. Samples:

1. Roof insulation, each type

2. Nails and fasteners, each type

D. Certificates:

1. Indicating type, thickness and thermal conductance of insulation.

(Average thickness for tapered insulation).

2. Indicating materials and method of application of insulation system on metal decks meet the requirements of Factory Mutual Research

Corporation for Class 1 Insulated Steel Deck Roofs.

E. Laboratory Test Reports: Thermal values of insulation products.

F. Layout of tapered roof system showing units required.

07 22 00 - 2

G. Documentation of supervisors training and experience showing knowledge of roofing procedures.

1.5 DELIVERY, STORAGE AND MARKING

A. Deliver materials to the site in original sealed packages or containers marked with the name and brand, or trademark of the manufacturer or seller.

B. Keep materials dry, and store in dry, weather tight facilities or under canvas tarps. Use of polyethylene or plastic tarps to cover materials is not permitted. Store above ground or deck level on wood pallets.

Cover ground under stored materials with plastic tarp.

1. Store rolled materials (felts, base sheets, paper) on end. Do not store materials on top of rolled material.

2. Store foam insulation away from areas where welding is being performed and where contact with open flames is possible.

C. Protect from damage from handling, weather and construction operations before, during, and after installation.

1.6 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society for Testing and Materials (ASTM):

C1289-10................Faced Rigid Cellular Polyisocynurate Thermal

Insulation Board

D41-11..................Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

D312-00(R2006)..........Asphalt Used in Roofing

D2178-15a...............Asphalt Glass Felt Used in Roofing and

Waterproofing

D2822-05(R2011).........Asphalt Roof Cement

D4897-01(2009)..........Asphalt Coated Glass Fiber Venting Base Sheet

C. Factory Mutual Global (FM):

4450-89.................Approved Standard for Class 1 Insulated Steel

Deck Roofs

D. National Roofing Contractors Association (NRCA):

The NRCA Roofing and Waterproofing Manual - Fifth Edition (2009).

E. Underwriters Laboratories, Inc. (UL):

Fire Resistance Directory (2009)

07 22 00 - 3

1.7 QUALITY ASSURANCE:

A. Roof insulation on combustible or steel decks shall have a flame spread rating not greater than 75 and a smoke developed rating not greater than 150, exclusive of covering, when tested in accordance with ASTM

E84, or shall have successfully passed FM Approvals 4450.

B. Insulation bearing the UL label and listed in the UL Building Materials

Directory as meeting the flame spread and smoke developed ratings will be accepted in-lieu-of copies of test reports.

C. Compliance with flame spread and smoke developed ratings will not be required when insulation has been tested as part of a roof construction assembly of the particular type used for this project and the construction is listed as fire-classified in the UL Building Materials

Directory or listed as Class I roof deck construction in the FM

Approvals "RoofNav."

D. Insulation tested as part of a roof construction assembly shall bear UL or FM labels attesting to the ratings specified herein.

1.8 PERFORMANCE REQUIREMENTS:

1. Follow the recommendations of the National Roofing Contractors Association "Roofing and Waterproofing Manual" for design criteria and ASHRAE Standard 90.1. Minimum R valve shall be 15.

2. Insure positive slope to drains occur; minimum of 1:50 (1/4 inch per foot) without any "gutters" (no slopes) between drains.

3. Insure drains are located at points of maximum deflection; such as at midspans and at bottom of slopes.

4. Do not use polystyrene insulation under bituminous roofing or waterproofing membrane.

5. Anchor insulation to the deck. No loose laid insulation.

6. Coordinate with electrical. Conduit is not to be run in the insulation.

7. Vapor retarders shall be considered for use over decks to receive insulation for heated buildings where the January average means temperature is below 4.5 C (40 F), the relative humidity is 45 percent or greater, and should always be specified for heated buildings where a high humidity condition is expected such as a kitchen, indoor swimming pool, or laundry. Use venting base sheet over all insulating concrete and poured gypsum decks to relieve possible vapor pressures that may occur. The venting base sheet also acts as a vapor retarder when insulation is solid mopped over the venting base sheet. As a general rule, follow NRCA procedures for determining if vapor retarders are required including venting and ASHRAE for calculations; however, under conditions of extreme humidity and cold weather conditions, the need for a vapor retarder is essential and calculations are necessary.

07 22 00 - 4

PART 2 - PRODUCTS

2.1 ASPHALT MATERIALS

A. Primer: ASTM D41.

B. Asphalt: ASTM D312, Type III or IV for vapor retarders and insulation.

C. Glass (Felt): ASTM D2178, Type IV, heavy duty ply sheet.

D. Venting Asphalt Base Sheet: ASTM D4897, Type I or Type II.

E. Roof Cement: ASTM D2822, Type I or Type II, asbestos free; or, D4586, Type I or Type II.

2.2 INSULATION

A. Isocyanurate Board: ASTM C1289, Type I, Class 2 or Type III.

B. Tapered Roof Insulation System Segments:

1. Fabricate of mineral fiberboard, isocyanurate, perlite board, or cellular glass. Use only one insulation material for tapered sections.

2. Cut to provide high and low points with crickets and slopes as shown.

3. Minimum thickness of tapered sections; 13 mm (1/2 inch), unless manufacturers allow taper to zero mm (inch).

2.3 FASTENERS

A. Fasteners for securing insulation to steel decks:

1. Conform to requirements of Factory Mutual Research Corporation for wind uplift.

2. Self-drilling galvanized screws with 50 mm (two inch) diameter disk.

3. Antibackout thread design.

4. Have a pullout resistance of 14 kg (30 pounds) minimum.

2.4 RECOVERED MATERIALS

A. Comply with following minimum content standards for recovered materials:

Material Type Percent by Weight

Plastic rigid foams: Polyisocyanurate/polyurethane

Rigid foam 9 percent recovered material

Foam-in-place 5 percent recovered material

Glass fiber reinforced 6 percent recovered material

Rock wool material 75 percent recovered material

B. The minimum-content standards are based on the weight (not the volume) of the material in the insulating core only.

07 22 00 - 5

PART 3 - EXECUTION

3.1 GENERAL

A. Do not apply roof insulation if deck will be used for subsequent work platform, storage of materials, or staging or scaffolding will be erected thereon.

B. Entire roof deck construction of any section of the building shall be completed before insulation system work is begun. Curbs, blocking, edge strips, and other components which insulation, roofing and base flashing is attached to shall be in place ready to receive insulation and roofing. Coordinate roof insulation operations with roofing and sheet metal work so that insulation is installed to permit continuous roofing operations.

C. Insulation system materials shall be dry and damage free when applied.

Do not use broken insulation or insulation with damaged facings. Remove damaged insulation from the site immediately.

D. Dry out surfaces that become wet from any cause during progress of the work before roofing work is resumed. Apply materials only to dry substrates.

E. Do not apply materials during damp or rainy weather, during excessive wind conditions, nor while moisture (dew, fog, snow, ice) or frost is present in any amount in or on the materials when temperature is below

10 °C (50 °F). Do not apply materials to substrate having temperature of

10 °C (50 °F) or less.

F. Phased construction is not permitted. The complete installation of all flashing, insulation, and roofing shall be completed in the same day except for the area where temporary protection is required when work is stopped.

3.2 SURFACE PREPARATION

A. Sweep decks to broom clean condition. Remove all dust, dirt or debris.

B. Remove projections that might damage materials.

C. Existing Roofs:

1. At areas to be altered or repaired, remove loose insulation and wet insulation.

2. Cut and remove existing insulation and vapor retarder for new work to be installed. Clean cut edges and install a temporary seal to cut surfaces. Use roof cement and one layer of 7 kg (15 pound) felt strip cut to extend 150 mm (6 inches) on each side of cut surface.

07 22 00 - 6

Bed strip in roof cement and cover strip with roof cement to completely embed the felt.

3.3 VAPOR RETARDER

A. General:

1. Install a continuous vapor retarder on roof decks as determined by design.

2. At vertical surfaces, turn up vapor retarder to top of insulation or base flashing.

3. At all pipes, walls, and similar penetrations through vapor retarder, seal openings with roof cement to prevent moisture entry from below.

4. Mop felts solidly in place as specified.

5. Seal penetrations with roof cement.

3.4. INSULATION THICKNESS

1. Thickness of roof insulation shown in specifications is nominal.

Actual thickness shall provide the thermal resistance "R" value of not less than specified.

2. When thickness of insulation to be used is more or less than that shown on the drawings, make adjustments in the alignment and location of roof drains, flashing, gravel stops, fascias and similar items at no additional cost to the Government.

3. Tapered insulation shall be preformed and fabricated to the slopes indicated. 5. Use not less than two layers of insulation when insulation is 25 mm (one inch) or more in thickness unless specified otherwise.

3.5 INSTALLATION OF INSULATION

A. Lay insulating units with close joints, in regular courses and with cross joints broken. When laid in more than one layer, break joints of succeeding layers of roof insulation with those in preceding layer. Bed insulation layers in Type III or IV asphalt firmly pressed into the hot bitumen. Keep bitumen below surface of insulation to receive single ply rubber roofing.

B. Lay units with long dimension perpendicular to the rolled

(longitudinal) direction of the roofing felt.

C. Cover all insulation installed on the same day by either:

1. The roofing membrane as specified.

2. Temporary protection as specified.

07 22 00 - 7

D. Seal all cut edges at penetrations and at edges against blocking with bitumen or roof cement.

E. Cut to fit tight against blocking or penetrations.

F. Over Vapor Retarder: Lay insulation in hot bitumen as specified.

G. Steel Deck:

1. Material and method of application of insulation systems used on metal decks shall meet the requirements of Underwriters laboratories for Class A or Factory Mutual Research Corporation for Class I

Insulated Steel Roof Deck.

2. Mechanically anchor first layer of insulation to steel deck to conform to FM Class 1-60, Insulated Steel Roof Deck.

3. Locate the long dimension edge joints to have solid bearing on top of deck ribs; do not cantilever over deck rib openings or flutes.

ASPHALT SHINGLES

07 31 13 - 1

SECTION 07 31 13

PART 1 - GENERAL

1.1 DESCRIPTION

This section specifies organic felt and fiberglass asphalt shingles.

1.2 RELATED WORK

A. Color of shingles: Submit for approval. Match existing roof color.

B. Counterflashing and flashing of roof projections: Section 07 60 00, FLASHING AND SHEET METAL.

1.3 SUMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Samples: Shingles, each type, color and texture.

C. Manufacturer's Literature and Data:

1. Shingles, each type

2. Installation instructions

1.4 DELIVERY AND STORAGE

A. Deliver materials in manufacturer's unopened bundles or containers with the manufacturer's brand and name clearly marked thereon.

B. Shingle bundle wrapping shall bear the label of Underwriters

Laboratories, Inc.

C. Store shingles in accordance with manufacturer's printed instructions.

Store roll goods on end in an upright position.

D. Keep materials dry, covered completely and protected from the weather.

1.5 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only.

B. American Society for Testing and Materials (ASTM):

D226/D226M-17...........Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

D2178/D2178M-15a........Asphalt Glass Felt used in Roofing and

Waterproofing

D3018/D3018M-11.........Class A Asphalt Shingles Surfaced with Mineral

Granules

F1667-17................Driven Fasteners: Nails, Spikes, and Staples

07 31 13 - 2

D1970/D1970M-17…………………..Standard Specification for Self-Adhering

Polymer Modified Bituminous Sheet Materials

Used as Steep Roofing Underlayment for Ice Dam

Protection

D4869/D4869M-16a……………………Standard Specification for Asphalt-Saturated

Organic Felt Underlayment Used in Steep Slope

Roofing

C. Underwriter’s Laboratories Inc. (UL):

UL790-04................Fire Tests of Roof Covering

1.6 WARRANTY

A. Roofing work subject to the terms of the Article “Warranty of

Construction”, FAR clause 52.246-21, except extend the warranty period to five years to include repair of leaks. In addition, contractor shall furnish a manufacturer’s warranty for a period of twenty years.

PART 2 - PRODUCTS

2.1 SHINGLES

A. Class A: (Fire resistive), per UL790. ASTM D3018, Type I and ASTM 3462, square butt for a maximum exposure of 125 mm (5 inches), headlap minimum 50 mm (2 inches), wind resistant, self sealing. Minimum weight:

10.3 Kg/sqm (210 lbs/100sft).

2.2 ROOFING NAILS

A. ASTM F1667; Type I, Style 20, galvanized steel, deformed shanks, with heads 9.5 mm to 11 mm (3/8-inch to 7/16-inch) diameter.

B. Use nails 32 mm (1-1/4 inches) long for shingles and 19 mm (3/4-inch long) for felt.

2.3 ROOFING FELT

A. Fiberglass Felt: ASTM D2178.

B. Organic Felt: ASTM D226, TYPE l.

C. Modified bitumen: ASTM D 1970.

D. Synthetic Roofing Underlayment: ASTM D226 and D4859.

2.4 ICE DAM PROTECTION (ICE AND WATER SHIELD)

A. Minimum 55-mil membrane meeting ASTM D1970.

1. Use on critical roof areas including eaves, ridges, valleys, dormers, and skylights.

07 31 13 - 3

PART 3 EXECUTION

3.1 PREPARATION

A. Roof surfaces shall be sound, reasonably smooth and free from defects which would interfere with roofing installation.

B. Roof accessories, vent pipes and other projections through the roof must be in place and roof flashing installed or ready for installation before laying shingles.

3.2 LAYING

A. Lay felt under shingles over entire roof.

B. Install asphalt felt underlayment, lapping a minimum of 100 mm (four inches) at ends, 50 mm (2 inches) at head and 300 mm (12 inches) over ridge. Extend felt 13 mm (1/2-inch) beyond edges of roof. Nail felt 125 mm (five inches) on centers along laps.

C. At eaves, install strip of 41 Kg (90 pound) mineral surface roll roofing not less than 460 mm (18 inches) wide and starter course of roof shingles with tabs reversed. Both shall overhang lower edge of roof 13 mm (1/2-inch).

D. Lay shingles with maximum exposure of 125 mm (5 inches). Nail shingles in accordance with manufacturer's published directions.

3.3 METAL DRIP EDGES

A. At rakes, install metal drip edges made of stainless steel specified under Section 07 60 00, FLASHING AND SHEET METAL. Apply the metal drip edge directly over the underlayment along the rakes.

B. Secure metal drip edges with compatible nails spaced not more than 250 mm (10 inches) on center along the inner edges.

3.4 FLASHINGS

Provide metal flashings specified under Section 07 60 00, FLASHING AND

SHEET METAL at the intersections of roofs, adjoining walls, or projections through the deck such as chimneys and vent stacks. Give careful attention to the installation of all flashings.

3.5 RIDGE

A. Bend each shingle lengthwise down center to provide equal exposure on each side of ridge. Beginning at one end of ridge, apply shingles with maximum 125 mm (5 inches) exposure.

B. Secure each shingle with one nail on each side, 210 mm (8-1/2 inches) back from exposed end and one inch up from edge.

07 31 13 - 4

3.6 VALLEY FLASHING

A. Install metal valley flashing shown and as specified under Section 07

60 00, FLASHING AND SHEET METAL.

B. Secure valley flashing in accordance with shingle manufacturer's printed instructions.

C. Expose flashing in open portion of valley a minimum of 125 mm (5 inches) and lap the shingles over the flashing a minimum of 125 mm (5 inches).

3.7 ROOF ACCESSORIES

A. Install all existing accessories.

B. Lap shingles over the accessories flashing a minimum of 125 mm (5 inches).

FLASHING AND SHEET METAL

07 60 00 - 1

SECTION 07 60 00

FLASHING AND SHEET METAL

PART 1 - GENERAL

1.1 DESCRIPTION

A. Formed sheet metal work for wall and roof flashing, copings, roof edge metal, fasciae, drainage specialties, and formed expansion joint covers are specified in this section.

1.2 RELATED WORK

NA

1.3 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text by the basic designation only. Comply with applicable provisions and recommendations of the following, except as otherwise shown or specified.

B. Aluminum Association (AA):

AA-C22A41 Aluminum Chemically etched medium matte, with clear anodic coating, Class I Architectural, 0.7-mil thick

AA-C22A42 Chemically etched medium matte, with integrally colored anodic coating, Class I Architectural,

0.7 mils thick

AA-C22A44 Chemically etched medium matte with electrolytically deposited metallic compound, integrally colored coating Class I

Architectural, 0.7-mil thick finish

C. American Architectural Manufacturers Association (AAMA):

AAMA 620 High Performance Organic Coatings on Coil

Coated Architectural Aluminum

AAMA 621 High Performance Organic Coatings on Coil

Coated Architectural Hot Dipped Galvanized

(HDG) and Zinc-Aluminum Coated Steel Substrates

D. American National Standards Institute/Single-Ply Roofing Institute

(ANSI/SPRI):

ANSI/SPRI ES-1-03 Wind Design Standard for Edge Systems Used with

Low Slope Roofing Systems

E. ASTM International (ASTM):

A167-99(R2009) Stainless and Heat-Resisting Chromium-Nickel

Steel Plate, Sheet, and Strip

07 60 00 - 2

A653/A653M-09 Steel Sheet Zinc-Coated (Galvanized) or Zinc

Alloy Coated (Galvanized) by the Hot-Dip

Process

B32-08 Solder Metal

B209-10 Aluminum and Aluminum-Alloy Sheet and Plate

B370-09 Copper Sheet and Strip for Building

Construction

D173-03 Bitumen-Saturated Cotton Fabrics Used in

Roofing and Waterproofing

D412-06 Vulcanized Rubber and Thermoplastic Elastomers-

Tension

D1187-97(R2002) Asphalt Base Emulsions for Use as Protective

Coatings for Metal

D3656-07 Insect Screening and Louver Cloth Woven from

Vinyl-Coated Glass Yarns

D4586-07 Asphalt Roof Cement, Asbestos Free

F. FM Approvals: RoofNav Approved Roofing Assemblies and Products:

1-49-09 Loss Prevention Data Sheet: Perimeter Flashing

G. International Code Commission (ICC):

International Building Code, Current Edition

H. National Association of Architectural Metal Manufacturers (NAAMM):

AMP 500-06 Metal Finishes Manual

I. Sheet Metal and Air Conditioning Contractors National Association

(SMACNA): Architectural Sheet Metal Manual 2012

1.4 PERFORMANCE REQUIREMENTS

A. Wind Uplift Forces: Resist the following forces per FM Approvals 1-49:

1. Wind Zone 1: 0.48 to 0.96 kPa (10 to 20 lbf/sq. ft.): 1.92-kPa

(40-lbf/sq. ft.) perimeter uplift force, 2.87-kPa (60-lbf/sq. ft.)

corner uplift force, and 0.96-kPa (20-lbf/sq. ft.) outward force.

2. Wind Zone 1: 1.00 to 1.44 kPa (21 to 30 lbf/sq. ft.): 2.87-kPa

(60-lbf/sq. ft.) perimeter uplift force, 4.31-kPa (90-lbf/sq. ft.)

corner uplift force, and 1.44-kPa (30-lbf/sq. ft.) outward force.

3. Wind Zone 2: 1.48 to 2.15 kPa (31 to 45 lbf/sq. ft.): 4.31-kPa

(90-lbf/sq. ft.) perimeter uplift force, 5.74-kPa (120-lbf/sq. ft.)

corner uplift force, and 2.15-kPa (45-lbf/sq. ft.) outward force.

4. Wind Zone 3: 2.20 to 4.98 kPa (46 to 104 lbf/sq. ft.): 9.96-kPa

(208-lbf/sq. ft.) perimeter uplift force, 14.94-kPa (312-lbf/sq.

07 60 00 - 3 ft.) corner uplift force, and 4.98-kPa (104-lbf/sq. ft.) outward force.

B. Wind Design Standard: Fabricate and install copings, roof-edge flashings tested per ANSI/SPRI ES-1.

1.5 SUSTAINABILITY REQUIREMENTS

A. Materials in this section may contribute towards contract compliance with sustainability requirements.

1.6 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

B. Shop Drawings: For all specified items, including:

1. Flashings.

2. Gutter and Conductors.

3. Expansion joints.

4. Fascia-cant.

C. Manufacturer's Literature and Data: For all specified items, including:

1. Two-piece counterflashing.

2. Thru wall flashing.

3. Non-reinforced, elastomeric sheeting.

4. Copper clad stainless steel.

5. Polyethylene coated copper.

6. Bituminous coated copper.

7. Fascia-cant.

D. Certificates: Indicating compliance with specified finishing requirements, from applicator and contractor.

1.7 PRE-INSTALLATION CONFERENCE

A. Convene a meeting on site, after submittals are received and approved but before any work, to review drawings and specifications, submittals, schedule, manufacturer instructions, site logistics and pertinent matters of coordination, temporary protection, governing regulations, tests and inspections; participants to include RE/COR and all parties whose work is effected or related to the work of this section.

PART 2 - PRODUCTS

2.1 FLASHING AND SHEET METAL MATERIALS

A. Stainless Steel: ASTM A167, Type 302B, dead soft temper.

B. Copper ASTM B370, cold-rolled temper.

07 60 00 - 4

C. Bituminous Coated Copper: Minimum copper ASTM B370, weight not less than 1 kg/m² (3 oz/sf); bituminous coating weight not less than 2 kg/m²

(6 oz/sf); or, copper sheets may be bonded between two layers of coarsely woven bitumen-saturated cotton fabric ASTM D173. Provide crimped exposed fabric surface.

D. Polyethylene Coated Copper: Copper sheet ASTM B370, weighing 1 Kg/m² (3 oz/sf) bonded between two layers of (two mil) thick polyethylene sheet.

E. Aluminum Sheet: ASTM B209, Alloy 3003-H14 except alloy used for color anodized aluminum to be as required to produce specified color. Alloy required to produce specified color must have the same structural properties as Alloy 3003-H14.

F. Galvanized Sheet: ASTM A653.

G. Non-reinforced, Elastomeric Sheeting: Elastomeric substances reduced to thermoplastic state and extruded into continuous homogenous sheet

(0.056 inch) thick.

1. Tensile Strength: Minimum 7 MPa (1,000 psi) tensile strength and not more than seven percent tension-set at 50 percent elongation when tested in accordance with ASTM D412.

2. No cracking or flaking when bent through 180 degrees over a 1 mm

(1/32 inch) diameter mandrel and then bent at same point over same size mandrel in opposite direction through 360 degrees at temperature of -30°C (-20 °F).

2.2 FLASHING ACCESSORIES

A. Solder: ASTM B32; flux type and alloy composition as required for use with metals to be soldered.

B. Rosin Paper: Sheathing paper, weighing minimum 141 g m²(3 lbs/100 sf).

C. Bituminous Paint: ASTM D1187, Type I.

D. Fasteners:

1. Use copper, copper alloy, bronze, brass, or stainless steel for copper and copper clad stainless steel, and stainless steel for stainless steel and aluminum alloy. Use galvanized steel or stainless steel for galvanized steel.

2. Nails:

a. Minimum diameter for copper nails: 3 mm (0.109 inch).

b. Minimum diameter for aluminum nails 3 mm (0.105 inch).

c. Minimum diameter for stainless steel nails: 2 mm (0.095 inch) and annular threaded.

07 60 00 - 5

d. Length to provide not less than 22 mm (7/8 inch) penetration into anchorage.

3. Rivets: Not less than 3 mm (1/8 inch) diameter.

F. Insect Screening: ASTM D3656, 18 by 18 regular mesh.

G. Roof Cement: ASTM D4586.

2.3 SHEET METAL THICKNESS

A. Except as otherwise shown or specified use thickness or weight of sheet metal as follows:

B. Concealed Locations (Built into Construction):

1. Copper: 30g (10 oz) minimum 0.33 mm (0.013 inch thick).

2. Stainless steel: 0.25 mm (0.010 inch) thick.

3. Copper clad stainless steel: 0.25 mm (0.010 inch) thick.

4. Galvanized steel: 0.5 mm (0.021 inch) thick.

C. Exposed Locations:

1. Copper: 0.4 Kg (16 oz).

2. Stainless steel: 0.4 mm (0.015 inch).

3. Copper clad stainless steel: 0.4 mm (0.015 inch).

D. Thickness of aluminum or galvanized steel is specified with each item.

2.4 FABRICATION, GENERAL

A. Jointing:

1. Lock and solder copper, stainless steel and copper clad stainless steel joints, except expansion and contraction joints.

2. Jointing of copper over 0.5 Kg (20 oz) weight or stainless steel over 0.45 mm (0.018 inch) thick to be done by lapping, riveting and soldering.

3. Provide joints conforming to following requirements:

a. Finish flat-lock joints not less than 19 mm (3/4 inch) wide.

b. Finish lap joints subject to stress not less than 25 mm (one inch) wide; soldered and riveted.

c. Finish unsoldered lap joints not less than 100 mm (4 inches) wide.

4. Make flat and lap joints in direction of flow.

5. Edges of bituminous coated copper, non-reinforced elastomeric sheeting and polyethylene coated copper to be jointed by lapping not less than 100 mm (4 inches) in the direction of flow and cementing with asphalt roof cement or sealant as required by the manufacturer's printed instructions.

6. Soldering:

07 60 00 - 6

a. Pre tin both mating surfaces with solder for a width not less than 38 mm (1 1/2 inches) of…