B08_Attach_153_REV_1st_Bank_061600_Sheathing_0007.pdf
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- Solicitation number
- 140P2023R0002
About this file
This document provides specifications for sheathing materials and installation requirements for the rehabilitation of First Bank in Independence National Historical Park in Philadelphia, Pennsylvania. Key requirements include the use of fire-retardant wood roof and parapet sheathing, plywood roof sheathing, glass-mat gypsum wall sheathing, and cement board wall sheathing for thin brick installation. Acceptable sheathing products are specified along with performance standards. Installation standards are also outlined for wood structural panels, gypsum sheathing, cementitious backer units, and replacement boards at existing buildings. The related federal contract opportunity is for project number INDE 245589 to rehabilitate the interior and exterior of First Bank under solicitation number 140P2023R0002 issued by the Department of the Interior National Park Service National Office.
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INDE-391-186336 06 16 00 - 1
PMIS 245589 SHEATHING
SECTION 06 16 00 -- SHEATHING
PART 1 – GENERAL
1.1 SUMMARY
A. The work of this section includes, but is not necessarily limited to, the following:
1. Fire-retardant wood roof and parapet sheathing
2. Plywood roof sheathing
3. Gypsum wall sheathing
4. Cement board wall sheathing for thin brick installation
5. Replacement board sheathing at existing building
1.2 RELATED WORK
A. Division 1 requirements
B. Section 05 40 00, “Cold-Formed Metal Framing”
C. Section 06 10 00, “Rough Carpentry”
D. Section 07 21 00, “Thermal Insulation”
E. Section 07 27 26, “Weather Barriers”
F. Section 07 61 00, “Sheet Metal Roofing”
1.3 SUBMITTALS
A. Product Data: Submit manufacturer’s product data for the following hardware and materials:
1. Fasteners and hardware
2. Plywood sheathing
3. Gypsum sheathing
4. Cement board
1.4 QUALITY ASSURANCE
A. Fire Resistance Ratings: ASTM E 119
1.5 DELIVERY, STORAGE AND HANDLING
INDE-391-186336 06 16 00 - 2
A. Store sheathing materials off the ground on pallets or dunnage and loosely covered with a waterproof membrane. Protect from soiling, breakage, impact or other damage.
1.6 PROJECT CONDITIONS
A. Coordinate installation of wall, parapet and roof sheathing with other trades affected by the work of this section to avoid damage to finished work and delays to the project schedule.
PART 2 -- PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Plywood roof sheathing: Either DOC PS 1 or DOC PS 2, Exterior, Structural 1.
B. Fire-Resistance Ratings: As tested according to ASTM E 119; testing by a qualified testing agency.
Identify products with appropriate markings of applicable testing agency.
1. Fire-Resistance Ratings: Indicated by design designations from UL's "Fire Resistance Directory" or from the listings of another qualified testing agency.
2.2 FIRE-RETARDANT TREATMENT
A. General: Where fire-retardant-treated materials are indicated, use materials complying with requirements in this article that are acceptable to authorities having jurisdiction and with fire-test-response characteristics specified as determined by testing identical products per test method indicated by a qualified testing agency.
B. Fire-Retardant-Treated Plywood by Pressure Process: Products with a flame-spread index of 25 or less when tested according to ASTM E 84, and with no evidence of significant progressive combustion when the test is extended an additional 20 minutes, and with the flame front not extending more than 10.5 feet beyond the centerline of the burners at any time during the test.
1. Exterior Type: Treated materials shall comply with requirements specified above for fire-retardant-treated plywood by pressure process after being subjected to accelerated weathering according to ASTM D 2898. Use for exterior locations and where indicated.
C. Design Value Adjustment Factors: Treated lumber plywood shall be tested according to ASTM D 5516 and design value adjustment factors shall be calculated according to ASTM D 6305. Span ratings after treatment shall be not less than span ratings specified. For roof sheathing and where high-temperature fire-retardant treatment is indicated, span ratings for temperatures up to 170 deg F shall be not less than span ratings specified.
D. Kiln-dry material after treatment to a maximum moisture content of 15 percent.
E. Identify fire-retardant-treated plywood with appropriate classification marking of qualified testing agency.
F. Application: Treat plywood indicated on Drawings.
INDE-391-186336 06 16 00 - 3
2.3 GYPSUM SHEATHING
A. Glass-Mat Gypsum Sheathing: ASTM C 1177.
1. Thickness: 1/2 inch.
2. Width: 4 feet.
3. Length: 8 feet.
4. Weight: 1.9 lb/sq. ft.
5. Edges: Square.
6. Surfacing: Fiberglass mat on face, back, and long edges.
7. Racking Strength (Ultimate, not design value) (ASTM E72): Not less than 540 pounds per square foot, dry.
8. Flexural Strength, Parallel (ASTM C473): 80 lbf, parallel.
9. Humidified Deflection (ASTM C1177): Not more than 2/8 inch.
10. Permeance (ASTM E96): Not less than 23 perms.
11. R-Value (ASTM C518): 0.56.
12. Mold Resistance (ASTM D3273): 10, in a test as manufactured.
13. Microbial Resistance (ASTM D6329, UL Environmental GREENGUARD 3-week protocol):
Will not support microbial growth.
B. Acceptable Products:
1. DensGlass Sheathing; Georgia Pacific
2. Gold Bond eXP Sheathing; National Gypsum
3. Securerock Glass Mat Sheathing, US Gypsum
4. Contracting Officer-approved equivalent.
2.4 CEMENT BOARD SHEATHING
INDE-391-186336 06 16 00 - 4
A. Cement Board: ASTM C1325; ½ inch thickness. Approved for use in ASTM C 1780 masonry veneer installations. Provide one of the following products:
1. PermaBase, PermaBase Building Products, Charlotte, NC
2. Durock, United States Gypsum,
3. Contracting Officer-approved equivalent
2.5 REPLACEMENT BOARD SHEATHING
A. Lumber: DOC PS 20 and applicable rules of grading agencies indicated. If no grading agency is indicated, comply with the applicable rules of any rules-writing agency certified by the ALSC Board of Review. Grade lumber by an agency certified by the ALSC Board of Review to inspect and grade lumber under the rules indicated.
1. Factory mark each piece of lumber with grade stamp of grading agency.
B. Replacement Sheathing Boards: 19 percent maximum moisture content and any of the following species and grades:
1. Mixed southern pine or southern pine; No.2 grade; SPIB.
2. Eastern softwoods; No. 2 Common grade; NeLMA.
3. Northern species; No. 2 Common grade; NLGA.
C. Thickness: 1½ inches to match existing
D. Width: To match existing
2.6 FASTENERS AND ACCESSORIES
A. Wood Fasteners
1. Hot-dipped galvanized or stainless steel
B. Gypsum and Cement Board Fasteners
1. Steel drill screws with corrosion-resistant coating
C. Cement Board Accessories
1. Alkali-resistant, glass-fiber joint tape
INDE-391-186336 06 16 00 - 5
PART 3 - EXECUTION
3.1 INSTALLATION, GENERAL
A. Do not use materials with defects that impair quality of sheathing or pieces that are too small to use with minimum number of joints or optimum joint arrangement. Arrange joints so that pieces do not span between fewer than three support members.
B. Cut panels at penetrations, edges, and other obstructions of work; fit tightly against abutting construction unless otherwise indicated.
C. Securely attach to substrate by fastening as indicated, complying with the following:
1. Table 2304.9.1, "Fastening Schedule," in the ICC's International Building Code.
2. ICC-ES evaluation report for fastener.
D. Coordinate wall, parapet and roof sheathing installation with flashing and joint-sealant installation so these materials are installed in sequence and manner that prevent exterior moisture from passing through completed assembly.
E. Do not bridge building expansion joints; cut and space edges of panels to match spacing of structural support elements.
3.2 WOOD STRUCTURAL PANEL INSTALLATION
A. General: Comply with applicable recommendations in APA Form No. E30, "Engineered Wood Construction Guide," for types of structural-use panels and applications indicated.
B. Fastening Methods: Fasten panels as indicated below:
1. Parapet and Roof Sheathing:
a. Nail to wood framing.
b. Screw to cold-formed metal framing.
c. Space panels 1/8 inch apart at edges and ends.
3.3 GYPSUM SHEATHING INSTALLATION
A. Comply with GA-253 and with manufacturer's written instructions.
1. Fasten gypsum sheathing to wood framing with nails or screws.
2. Fasten gypsum sheathing to cold-formed metal framing with screws.
3. Install panels with a 3/8-inch gap where non-load-bearing construction abuts structural elements.
INDE-391-186336 06 16 00 - 6
4. Install panels with a 1/4-inch gap where they abut masonry or similar materials that might
3.4 CEMENTITIOUS BACKER UNIT INSTALLATION
A. Install panels and treat joints according to ANSI A108.11 and manufacturer's written instructions for type of application indicated.
3.5 REPLACEMENT BOARD SHEATHING
A. Cut deteriorated portion of existing sheathing boards back to mid-point of the nearest supports.
B. Install replacement board(s), leaving 1/8-inch gap. at each end. Fasten with galvanized or stainless steel screws of sufficient length to penetrate framing 1½” inches.
END OF SECTION 06 16 00
| 1. Fire-retardant wood roof and parapet sheathing |
| 2. Plywood roof sheathing |
| 3. Gypsum wall sheathing |
| 4. Cement board wall sheathing for thin brick installation |
| 5. Replacement board sheathing at existing building |
| A. Product Data: Submit manufacturer’s product data for the following hardware and materials: |
| 1. Fasteners and hardware |
| 2. Plywood sheathing |
| 3. Gypsum sheathing |
| 4. Cement board |
| 2.1 PERFORMANCE REQUIREMENTS |
| A. Plywood roof sheathing: Either DOC PS 1 or DOC PS 2, Exterior, Structural 1. |
| B. Fire-Resistance Ratings: As tested according to ASTM E 119; testing by a qualified testing agency. Identify products with appropriate markings of applicable testing agency. |
| 1. Fire-Resistance Ratings: Indicated by design designations from UL's "Fire Resistance Directory" or from the listings of another qualified testing agency. |
| A. General: Where fire-retardant-treated materials are indicated, use materials complying with requirements in this article that are acceptable to authorities having jurisdiction and with fire-test-response characteristics specified as determined by t... |
| B. Fire-Retardant-Treated Plywood by Pressure Process: Products with a flame-spread index of 25 or less when tested according to ASTM E 84, and with no evidence of significant progressive combustion when the test is extended an additional 20 minutes, ... |
| 1. Exterior Type: Treated materials shall comply with requirements specified above for fire-retardant-treated plywood by pressure process after being subjected to accelerated weathering according to ASTM D 2898. Use for exterior locations and where in... |
| C. Design Value Adjustment Factors: Treated lumber plywood shall be tested according to ASTM D 5516 and design value adjustment factors shall be calculated according to ASTM D 6305. Span ratings after treatment shall be not less than span ratings spec... |
| D. Kiln-dry material after treatment to a maximum moisture content of 15 percent. |
| E. Identify fire-retardant-treated plywood with appropriate classification marking of qualified testing agency. |
| F. Application: Treat plywood indicated on Drawings. |
| 2.3 GYPSUM SHEATHING |
| A. Glass-Mat Gypsum Sheathing: ASTM C 1177. |
| 1. Thickness: 1/2 inch. |
| 2. Width: 4 feet. |
| 3. Length: 8 feet. |
| 4. Weight: 1.9 lb/sq. ft. |
| 5. Edges: Square. |
| 6. Surfacing: Fiberglass mat on face, back, and long edges. |
| 7. Racking Strength (Ultimate, not design value) (ASTM E72): Not less than 540 pounds per square foot, dry. |
| 8. Flexural Strength, Parallel (ASTM C473): 80 lbf, parallel. |
| 9. Humidified Deflection (ASTM C1177): Not more than 2/8 inch. |
| 10. Permeance (ASTM E96): Not less than 23 perms. |
| 11. R-Value (ASTM C518): 0.56. |
| 12. Mold Resistance (ASTM D3273): 10, in a test as manufactured. |
| 13. Microbial Resistance (ASTM D6329, UL Environmental GREENGUARD 3-week protocol): Will not support microbial growth. |
| B. Acceptable Products: |
| 1. DensGlass Sheathing; Georgia Pacific |
| 2. Gold Bond eXP Sheathing; National Gypsum |
| 3. Securerock Glass Mat Sheathing, US Gypsum |
| 4. Contracting Officer-approved equivalent. |
| 2.4 CEMENT BOARD SHEATHING |
| A. Cement Board: ASTM C1325; ½ inch thickness. Approved for use in ASTM C 1780 masonry veneer installations. Provide one of the following products: |
| 1. PermaBase, PermaBase Building Products, Charlotte, NC |
| 2. Durock, United States Gypsum, |
| A. Lumber: DOC PS 20 and applicable rules of grading agencies indicated. If no grading agency is indicated, comply with the applicable rules of any rules-writing agency certified by the ALSC Board of Review. Grade lumber by an agency certified by the ... |
| 1. Factory mark each piece of lumber with grade stamp of grading agency. |
| B. Replacement Sheathing Boards: 19 percent maximum moisture content and any of the following species and grades: |
| 1. Mixed southern pine or southern pine; No.2 grade; SPIB. |
| 2. Eastern softwoods; No. 2 Common grade; NeLMA. |
| 3. Northern species; No. 2 Common grade; NLGA. |
| PART 3 - EXECUTION |
| 3.1 INSTALLATION, GENERAL |
| A. Do not use materials with defects that impair quality of sheathing or pieces that are too small to use with minimum number of joints or optimum joint arrangement. Arrange joints so that pieces do not span between fewer than three support members. |
| B. Cut panels at penetrations, edges, and other obstructions of work; fit tightly against abutting construction unless otherwise indicated. |
| C. Securely attach to substrate by fastening as indicated, complying with the following: |
| 1. Table 2304.9.1, "Fastening Schedule," in the ICC's International Building Code. |
| 2. ICC-ES evaluation report for fastener. |
| D. Coordinate wall, parapet and roof sheathing installation with flashing and joint-sealant installation so these materials are installed in sequence and manner that prevent exterior moisture from passing through completed assembly. |
| E. Do not bridge building expansion joints; cut and space edges of panels to match spacing of structural support elements. |
| 3.2 WOOD STRUCTURAL PANEL INSTALLATION |
| A. General: Comply with applicable recommendations in APA Form No. E30, "Engineered Wood Construction Guide," for types of structural-use panels and applications indicated. |
| B. Fastening Methods: Fasten panels as indicated below: |
| 1. Parapet and Roof Sheathing: |
| a. Nail to wood framing. |
| b. Screw to cold-formed metal framing. |
| c. Space panels 1/8 inch apart at edges and ends. |
| 3.3 GYPSUM SHEATHING INSTALLATION |
| A. Comply with GA-253 and with manufacturer's written instructions. |
| 1. Fasten gypsum sheathing to wood framing with nails or screws. |
| 2. Fasten gypsum sheathing to cold-formed metal framing with screws. |
| 3. Install panels with a 3/8-inch gap where non-load-bearing construction abuts structural elements. |
| 4. Install panels with a 1/4-inch gap where they abut masonry or similar materials that might |
| 3.4 CEMENTITIOUS BACKER UNIT INSTALLATION |
| A. Install panels and treat joints according to ANSI A108.11 and manufacturer's written instructions for type of application indicated. |
| 3.5 REPLACEMENT BOARD SHEATHING |
| A. Cut deteriorated portion of existing sheathing boards back to mid-point of the nearest supports. |
| B. Install replacement board(s), leaving 1/8-inch gap. at each end. Fasten with galvanized or stainless steel screws of sufficient length to penetrate framing 1½” inches. |
| C. |
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