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System Specifications <br /> MECHANICALLY ATTACHED TPO Revised March 2615 <br /> MW <br /> openings are located, a minimum of four.(4)perimeter sheets <br /> (centered over the opening)must be specified as shown. As an <br /> option to the above perimeter securehlent,an:adhered <br /> membranes®ction may be used in lieu of the.mechanically <br /> fastened.membrane at large openings'in accordance-with the <br /> Mule-Hide Fully Adhered TPO Roof System Specification. <br /> NOTE: Depth of perimeter area shall not be less than2.5 times <br /> the width of the opening. See Detail MHT-MA-103A. <br /> 2. Bu lid ings With_overhangs <br /> (Figure 2)—The membrane. <br /> must be specified with perimeter <br /> sheets installed'over the entire <br /> overhang,area extending onto <br /> the main roof deck when at the I i <br /> same level. As an option,an <br /> adhered membrane section may <br /> be used.in,lieu of the "TAL r,:?a SeE-,s.OVER nW <br /> OMRS OV!M W AREA exmvDiKo a so <br /> mechanically fastened 7W'-MAX ROOF AT DE s" <br /> membrane at building overhangs _EVES As sew <br /> in accordance.with the Mule- Flgure.2 <br /> Hide Fully Adhered TPO Roof <br /> System Specification. See Detail MHT-MA-103B. <br /> B. Field Areas <br /> a. Membrane should run perpendicular to the direction of steel deck <br /> flutes and orientation of wood decks where possible. <br /> b. All membrane overlaps shall be installed to facilitate the flow of water. <br /> Seams shall be shingled or run parallel to the flow of water. Backwater <br /> seams are not permitted. <br /> C. All membrane sheets,are to be overlapped a minimum of 5-1/2"to <br /> provide space for fastener and disc placement and for a continuous, <br /> minimum 2"wide weld. <br /> d. Do not run any seams through field;drains or sumps. Any seams running <br /> through drains shall be cut out and target patches(36"x 36")shall be <br /> installed. <br /> 3.0.9 Welding of Lap Areas <br /> A. General <br /> 1.. Roofing membrane is to be hot air welded only. Seaming of"membrane to <br /> membrane"and"flashing/detail membrane to membrane"shall be by hot air <br /> welding only. <br /> 2. All surfaces to be welded shall be clean and dry. <br /> B. Hot Air Welding <br /> 1. Machines for hot air welding are available from several different sources. Each <br /> manufacturer's instructions for use shall be followed, as well.as all local codes <br /> regarding electric grounding, supply and other related functions. Since most <br /> automatic welding machines require 218 to 230 volts, the use of a portable <br /> Page 20 05=1111 MULE-HIDE PRODUCTS CO.,INC <br />