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fasteners in the seams in the field sheets. Spacing of the rows of fasteners in the <br /> corners shall be reduced to 40% of the spacing of the rows of fasteners in the <br /> field sheets. Spacing af the fasteners in the seams shall remain the same <br /> distance a�rt as the spacing of the fasteners in the seams in the field sheets. <br /> Fastener shall be supplied by Mtde-Hide and shall be installed according to <br /> fastener manufacturers instructions and using the fastener manufacture�'s <br /> recommended fastening tools. <br /> When installing Mule-Hide PVC Membranes using either Mule-Hide's PVC <br /> Coated Metal Flashing or PVC Membrane Flashing, the first perimeter sheet � <br /> shall be a half width sheet. Subsequent sheets may be either Perimeter sheets <br /> (haff width sheets) or full width sheets as required. If the project requires FM <br /> compliance, contad Mule-Hide (prior to bidding the project) to review sheet <br /> layouts, sizes and enhancements to address the perimeter and comer areas. <br /> Note: For FM 1-90 or greater compliance, where the perimeter sheets are wider <br /> than 3', Perimeter sheets cannot run parallel with the direction aF the flutes on <br /> steel decks. Full width field sheets are run perpendicular to the edge vf the roaF <br /> (ar base of parapet watl) and additional row of fasteners installed running paratlal <br /> and centered betvu�een the field seams. <br /> 2. Field Areas <br /> a. Membrane should run perpendicular to the direction ofi steel deck flutes <br /> and orientation of wood decks. <br /> b. All membrane overlaps shall be installed to facilitate the flow of water. <br /> c. All membrane sheets are #o be overlapped a minimum of 5" to provide <br /> space for fastener and disc placement and for a cnntinuous 1-1/2" wide <br /> weld. <br /> C. The roafing contractor shall check afl welded seamsfor continuity and integrity using a <br /> rounded screwdriver or other suitabfe blunt object. The contrador should perform <br /> several sample test seams each day. Prior to welding field seams, the contractor shall, <br /> using scrap material, run at least tvw test seams, each a minimum of 2' long. Each test <br /> seam shall be used to determine adequate seam strength and to ensure the equipment <br /> has warmed up and is operating properly. This should be done each time the equipmerrt <br /> is tumed on after a cool down period. <br /> 3.08 Welding of Lap Areas <br /> A. General <br /> 1. Roofing membrane fleld seams are to be hot air w�elded. <br /> 2. All surfaces to be welded shall be dean and dry. <br /> B. Hot-Air Welding <br /> 1. Machines for hot air welding are available from �everal different sources. Each <br /> manufactur�r's instructions for use shall be followecl, as w�ell as all local oodes <br /> regarding electric grounding, supply and dher related fundions. Since most <br /> automatic welding machines require 218 to 230 vdts, fhe use af a portable <br /> generator on the roaf is recommended for greater flexibility. Muie-Hide requires <br /> the use of automatic welding machines ior all field sheet se�ning. On1y <br /> those areas that cannot be completed with an automatic welder may be <br /> 12 <br />