Sarnafil S327 Mechanically-Attached Engineered System Introduction



Download 302.19 Kb.
Page5/9
Date conversion29.04.2016
Size302.19 Kb.
1   2   3   4   5   6   7   8   9

EXECUTION



PRE-CONSTRUCTION CONFERENCE


      1. The Applicator, Owner's Representative/Designer and Manufacturer(s) shall attend a pre-construction conference.




      1. The meeting shall discuss all aspects of the project including but not limited to:



        1. Safety

        2. Set up

        3. Construction schedule

        4. Contract conditions

        5. Coordination of the work



SUBSTRATE CONDITION


      1. Applicator shall be responsible for acceptance or provision of proper substrate to receive new roofing materials.




      1. Applicator shall verify that the work done under related sections meets the following conditions:



        1. Roof drains and/or scuppers have been reconditioned and/or replaced and installed properly.

        2. Roof curbs, nailers, equipment supports, vents and other roof penetrations are properly secured and prepared to receive new roofing materials.

        3. All surfaces are smooth and free of dirt, debris and incompatible materials.

        4. All roof surfaces shall be free of water, ice and snow.




            1. SUBSTRATE PREPARATION

The roof deck and existing roof construction must be structurally sound to provide support for the new roof system. The Applicator shall load materials on the rooftop in such a manner to eliminate risk of deck overload due to concentrated weight. The Owner's Representative shall ensure that the roof deck is secured to the structural framing according to local building code and in such a manner as to resist all anticipated wind loads in that location.




      1. New Construction



        1. Steel Deck:





                  1. FM approved steel deck - The roof deck shall be 22 gauge (minimum) grade E and shall conform and be installed to meet the latest revision of FM's Loss Prevention Data Sheet 1-28 and the local code's current requirements.




                  1. Non-FM approved steel deck - The roof deck shall be 24 gauge (minimum) grade D and shall conform and be installed to the local code's current requirements.



        1. Wood Deck:





                  1. FM approved wood deck - The roof deck shall be minimum 2 inch (50 mm) thick lumber or ¾ inch (19 mm) thick treated plywood. The deck shall conform to FM requirements for Class 1 fire-retardant and rot-resistant wood decks. Deck shall be installed according to FM and local code requirements.




                  1. Non-FM approved wood deck - The roof deck shall be minimum 1½ inch (25 mm) thick lumber or 15/32 inch (12 mm) thick plywood. Deck shall be installed according to local code requirements. Contact Sarnafil Technical for fastening patterns and methods.



        1. Poured Lightweight (Cellular) Concrete Substrate:

The lightweight concrete shall be installed by a trained lightweight concrete Applicator in accordance with the lightweight concrete manufacturer's requirements and industry practice. The surface shall be sealed with a water-based sealer accepted by the lightweight concrete manufacturer to create a surface free from dust and loose material. The wet and dry densities shall be in accordance with the manufacturer's and FM’s (if applicable) requirements. Sharp ridges or other projections above the surface shall be removed before roofing. An insulation recover board is required as a substrate to adhere to. Fastening shall be into the structural deck below the lightweight concrete (see steel/concrete deck requirements).



        1. Poured Normal Weight Structural Concrete Deck:

The roof deck shall be installed and cured in accordance with industry standards. The surface shall have a smooth and level finish and shall be free of dust, excess moisture, oil-based curing agents and loose debris. Sharp ridges or other projections above the surface shall be removed before roofing. An insulation recover board is required as a substrate to adhere to.



        1. Precast/Prestressed Concrete Panel Deck:

The roof deck shall be installed in accordance with the concrete panel manufacturer's requirements and industry practice. The surface shall have a smooth and level finish and shall be free of dust, moisture, oil or loose debris. All joints between precast units shall be grouted. Any differentials in height between precast units shall be feathered for a smooth transition. Sharp ridges or other projections above the surface shall be removed before roofing. Panels shall be secured to structural supports as recommended by deck manufacturer. An insulation recover board is required as a substrate to adhere to.



1   2   3   4   5   6   7   8   9


The database is protected by copyright ©essaydocs.org 2016
send message

    Main page