H.01.01 077253 Snow Guards.pdf
PDF 63 KB Posted
- Attached to
- Roof Replacement Bldg 54 Federal contract opportunity
- Solicitation number
- W91236-20-B-2004
About this file
This document is a specification section for snow guards to be installed on a roof renovation project at Building 54 of the Defense Supply Center Richmond in Virginia. The specification provides requirements for rail-type snow guards to be attached through a PVC roof membrane system onto new metal roof decking. The snow guards are to be dark bronze anodized aluminum with brackets and bases of stainless steel. They must be designed by a professional engineer to withstand snow and wind loads, temperature fluctuations, and specified safety factors. The snow guards must be installed in a continuous rail system with attachment plates spaced at 6 feet maximum center-to-center. The related federal contract opportunity is for the roof replacement project at Building 54 with the solicitation number W91236-20-B-2004 and being conducted by the Department of the Army Corps of Engineers Norfolk District.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| B.01.02_Abstract Building 54.pdf | ||
| 20-B-2004 Amendment 5 RFI Responses.pdf | ||
| A.03.27 Solicitation Bldg 54 Amendement 4.pdf | ||
| H.01.01 01 35 26.00 50- Gopvernment Safety Requirements.pdf | ||
| H.01.01 07 22 00 Roof and Deck Insulation.pdf | ||
| H.01.01 BLDG 54 A-108 REVISED 6-30-20.pdf | ||
| H.01.01 BLDG54AD401_Revised_06_30_20.pdf | ||
| H.01.01 BLDG54 AD101_11_06_18.pdf | ||
| A.07.23 Solicitation Bld 54 Amendment 3.pdf | ||
| A.01.23 B54 Solicitation Amendement 2.pdf | ||
| 20-B-2004 Amendment 1.pdf | ||
| 20-B-2004 Bldg 54 Roof.pdf | ||
| H.01.01 - DLA WH54 ROOF REPLACEMENT CORRECTED 100P DRAWINGS.pdf | ||
| B54 SPECIFICATIONS.zip | ZIP file |
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Text version
BLDG. 54 ROOF RENOVATIONS
DEFENSE SUPPLY CENTER RICHMOND (DSCR), VIRGINIA
W91236-17-D-0002 T.O. #170045
SECTION 07 54 19 Page 1
SECTION 077253 - SNOW GUARDS ADDENDUM NO. 1
PART 1 - GENERAL
1.1 REFERENCES
A. The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.
AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)
ANSI/SPRI ES-1 (2003) Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems
AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)
ASCE 7 (2017) Minimum Design Loads for Buildings and Oth-er Structures
AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)
ASSE/SAFE A10.24 (2006) Roofing - Safety Requirements of Low-Sloped
Roofs
ASTM INTERNATIONAL (ASTM)
ASTM D4434/D 4434M (2012) Poly(Vinyl Chloride) Sheet Roofing
ASTM E108 (2011) Fire Tests of Roof Coverings
FM GLOBAL (FM)
FM 4470 (2010) Single-Ply, Polymer-Modified Bitumen Sheet, Built-up Roof (BUR), and Liquid Applied Roof As-semblies for Use in Class 1 and Noncombustible Roof Deck Construction
FM APP GUIDE (updated on-line) Approval Guide http://www.approvalguide.com/
BLDG. 54 ROOF RENOVATIONS W91236-17-D-0002
DEFENSE SUPPLY CENTER RICHMOND (DSCR), VIRGINIA T.O. #170045
SNOW GUARDS 077253 - 2
NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)
NRCA 3740 (2005) The NRCA Waterproofing Manual
UNITED FACILITIES CRITERIA
UFC 1-200-01 General Building Requirements (Change 2, 1 Nov. 2014)
UFC 1-200-02 High Performance and Sustainable Building Re-quirements
UNDERWRITERS LABORATORIES (UL)
UL 790 (2004; Reprint Jul 2014) Standard Test Methods for
Fire Tests of Roof Coverings
1.2 SUMMARY
Snow Rail system Attached thru polyvinyl-chloride (PVC) roof membrane system applied rigid roof insulation over recovery board and into new metal roof decking substrate.
A. Section Includes:
1. Rail-type, flat-mounted snow guards.
2. Rail-type, seam-mounted snow guards.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product, include construction details, material descriptions, dimensions of individual components and profiles, and finishes.
B. Shop Drawings: Include roof plans showing layouts and attachment details of snow guards.
1. Include details of rail-type snow guards.
C. Samples:
1. Rail-Type Snow Guards: Bracket, 12-inch-long rail, and installation hardware.
a. For units with factory-applied finishes, submit manufacturer's Dark Bronze
Anodized.
D. Delegated-Design Submittal: For snow guards, include analysis reports signed and sealed by the qualified professional engineer responsible for their preparation.
1. Include calculation of number and location of snow guards.
SNOW GUARDS 077253 - 3
1.4 INFORMATIONAL SUBMITTALS
A. Qualification Data: For professional engineer's experience with providing delegated design engineering services of the kind indicated, including documentation that the engineer is licensed in the jurisdiction in which the Project is located.
B. Product Test Reports: For each type of snow guard, for tests performed by a qualified testing agency, indicating load at failure of attachment to roof system identical to roof system used on this Project.
1.5 FIELD CONDITIONS
A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit adhesive-mounted snow guards to be installed, and adhesive cured, according to adhesive manufacturer's written instructions.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000
"Quality Requirements," to design snow guards, including attachment to roofing material and roof deck, as applicable for attachment method, based on the following:
1. Roof snow load.
2. Snow drifting
3. Roof slope.
4. Roof type.
5. Roof dimensions.
6. Roofing substrate type and thickness.
7. Snow guard fence style type.
8. Snow guard fastening method and strength.
9. Snow guard spacing.
10. Coefficient of Friction Between Snow and Roof Surface: 0.
11. Factor of Safety 3.
B. Performance Requirements: Provide snow guards that withstand exposure to weather and resist thermally induced movement without failure, rattling, or fastener disengagement due to defective manufacture, fabrication, installation, or other defects in construction.
1. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces
C. Structural Performance: Snow guards shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated.
1. Snow Loads: As indicated on Drawing AS001.
SNOW GUARDS 077253 - 4
2.2 RAIL-TYPE SNOW GUARDS
A. Rail-Type, Seam-Mounted Snow Guards:
1. Description: Snow guard rails fabricated from metal extrusions, anchored to brackets and equipped with one rail with integral track color DARK BRONZE ANODIZED.
2. Brackets and Baseplate: ASTM A240/A240M, Type 304 stainless steel; mill finish.
3. Seam clamps: ASTM B221 aluminum extrusion or ASTM B85/B85M aluminum casting with stainless steel set screws incorporating round nonpenetrating point; designed for use with applicable roofing system to which clamp is attached.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates and conditions, with Installer present, for compliance with requirements for installation tolerances, snow guard attachment, and other conditions affecting performance of the Work.
1. Verify compatibility with and suitability of substrates, including compatibility with finishes or primers.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Clean and prepare substrates for bonding snow guards.
B. Prime substrates according to snow guard manufacturer's written instructions.
3.3 INSTALLATION
A. Install snow guards according to manufacturer's written instructions.
1. Space attachment plates at 6’-0” on center max. and on the Shop Drawings.
2. Snow guard railing system is continuous.
B. Attachment for PVC Roofing:
1. Provide PVC flashing over attachment plates according to manufacturer's written instructions.
END OF SECTION 077253
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