Community College of Allegheny County Pittsburgh, Pennsylvania
2022 Library Roofing Project
E. Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system.
F. Remove and discard temporary seals before beginning work on adjoining roofing.
G. Substrate-Joint Penetrations: Prevent adhesive from penetrating substrate joints, entering building, or damaging roofing system components or adjacent building construction.
H. It is the b uilding owner’s responsibility or that of its architect, engineer, or subcontractor to determine if the Building Code criteria are met for the particular geographic area where the building is located or the particular construction of the building.
3.05
INSULATION INSTALLATION
A. Coordinate installing roofing system components, so insulation is not exposed toprecipitation or left exposed at the end of the workday.
B. Comply with roofing system manufacturer’s written instructions for installing roofing insulation.
Refer to Section 01010 Summary of Work for detailed requirements.
C.
3.06
HOT AIR WELDING EQUIPMENT
A. Seams can only be made by the hot-air welding process. When the membrane is properly fused, the hot-air heat welding process produces seams that are as strong as the membrane itself. The following information is presented as a guide to assist subcontractors in utilizing hot-air heat welding equipment. Prior to actual selection and operation of the hot-air heat welding equipment, refer to the manufacturer’s operatin g instructions. The operation of hot-air heat welding equipment, and the results obtained utilizing this equipment, are the responsibility of the roofing subcontractor. 1. Leister Variant Automatic Welder a. Power Requirements: 220 volts, 30 amp, and 7500 watts single phase. b. Power cord and plugs: #10 wire with 3-prong twist plug. #10 wire may be used up to 150' in length. For longer lengths, consult an electrician for line voltage drop.
c. d.
Element: 4500 Watts
Adjustment Tools: Adjustable wrench, various metric box wrenched, various metric Allen wrenches, screwdrivers, 40mm nozzle only. Additional Weight: A 45lb. Supplemental weight is required for the automatic welder. It shall rest on the aluminum housing over the rear wheels when the welder is being used.
e.
2.
Leister “Triac” Hand Welder a.
Power requirements: 115 volts, 15 amps, and 1800 watts single phase. b. Power cord #12. Check with electrician for line voltage drop for length over 200'.
07540-7 THERMOPLASTIC MEMBRANE ROOFING
February 2022
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