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SFSystem Planning and Assembly Installation Manual OSUNPOWER <br />2. Installing the lowest row of standoffs, L-feet and rail: <br />Intall standoffs with flashing directly onto high profile roofing <br />material (tile or shake) or low profile roofing material (asphalt <br />shingles or sheet metal). 1-feet must be flush with or above the <br />highest point of the roof surface. <br />Install the firs, row of standoffs at the lower edge of the <br />installation area. Ensure standoffs are aligned by using a chalk <br />line. (A SF System rail can also be used as a straight edge.) <br />SF System Rail <br />Drill a pilot hole through roof into the center of the rafterat <br />each standoff lag screw hole location. Many types and brands <br />of flashings can be used with the SF System. SunPower offers a <br />Oatey® "No-Call" flashings for its steel srandoffs and Oatey® <br />or SunPower flashings for its aluminum nvo-piece standoffs. <br />Roof geok <br />Standoff / \ <br />L4oot /X\//0/ <br />Fasten the standoffto the roof with the lagscrews. Position <br />and attach the L-foot with respect to the lower edge of the roof <br />as illustrated in Figure 3. <br />Cut the rails to your amy width, being sure to keep rail slots <br />free of roofing grit or other debris, If your installation requires <br />spikes, assemble them prior to attaching 1-feet (see 'Footing <br />and splicing requirements," below, and UMaterial planning for <br />rails and cap strips," p. 7). Slide the 3/8-inch mounting bolts <br />into the footing slots. lf more chan onespticels usedon a rail, <br />3Ude L.:foot bol[(s) into thefooring slot(s) ofthe interior rail <br />segment(s) before spliting. <br />zae' 22.3 <br />Rgure 3. Stando#and L-Foot oHentatlon. <br />Ikosely attach the rails to the L·feet with the flange nuts. <br />Ensure that rails are oriented with respect to the L-feet as <br />shown in Figure 3. Align the ends of the rail to theedgeof the <br />installation area. Ensure that the rail is straight and parallel to <br />the edge of the roof. Then tighten the lag screws. <br />I c -......1 .4 <br />Figure 4. Thls ezomple assumes a rail:ewn times the length <br />ofthefootirtg gtacing (Al. A gpllce may be located in any {f <br />the shaded afecs. Irmore than one :plice is used be sure the <br />combination does not violateRequhment, 5,6, or Z <br />l-foot <br />0 <br />Footing and splicing requirements: <br />The following criteria are required for sound installations. <br />While shortsections of rail are structumily permissable, they <br />can usually be avoided by effective planning, which also <br />promotes superior aesthetics. See "Material planning for rails <br />and cap strips» (p. D. <br />The installer is solety responsiblejor ensuring that the roofand its <br />structurcl members mn support thearroyand its lA€ loads. <br />For millength3 exceeding 32.feet, thermatexpansion joints may <br />be necessary. Please contact SunPower <br />1. Footing spacing along the rail (A in illustration above) is <br />determined by wind loading (see pp. 4-5, especially step <br />4). Foot spacing must never exceed 48 inches. <br />2. Oveghang (B) mustbe nomorethan halfthe lengthof the <br />maxirnum footing spacing (A). For example, if Span A is <br />32 inches, Overhang B should not exceed 16 inches. <br />3. Do not locate a splice in the center third of the span <br />between two adjacent feet. <br />4. In a spliced length of rail, all end sections must be <br />supported by no less than two L-feet <br />5. All interior rail sections must be supported by no tess than <br />one L-foot. <br />6. Interior rail sections supported by only one L-foot mustbe <br />adjacent, on at least one side, to a rail section supported <br />by no less than two L·feet <br />7. Rail sections longer than half the footing spacing requiteno fewer than two L·feet. <br />5 <br />SUNDOWER SFSystem Planning and Assembly Installation Manual <br />3. I.aying out and installing the next row of L-feet: <br />With L.feet only: Position the second row of L.feet in <br />accordance with Figure 5. Ensure that you measure between <br />the lower bolt hole centers of each row of L-feet. Install the <br />second row of 1-feetinthe same mannerand orientationas <br />the first row, but leave the lag screws a half Ium loose. Be <br />aware of the set-up time of your sealant; the L·feet will not be <br />fully tightened und Step 4. <br />enoch 4 %- 5 */ <br />, hole) ./9' 7 <br />4.7.7 <br />/ <br />«A / <br />Figurr 5. woot edon. See the note on module length in the <br />caption of Figure 2 Cp- 4) <br />4. Installing the second rails: <br />Install and align the second ran in the same manner and <br />orientation as the first rail. After rail alignment, tighten the <br />rail mounting bolts. <br />Layone module in place at one end ofthe rails, and snug <br />the upper rail (Fig. 6) noward the lowerrail, leaving no gap <br />between the ends of the modules and eitherrail. Of pan·head -- <br />screw heads represent the true end of the modules, be sure <br />the screw heads touch the railson both ends.)Tighten thelag <br />screw on thatend. Slide the module down the rails, snugging <br />the rails and tightening the remaining lagscrews as you go. <br />Log screw <br />f¥,t) <br />log screw <br />(haV turn loose} <br />€ <br />Figum 6. Position and secure top mil <br />5. Installing remaining L-feet and rails: <br />Install the L·feet and the rails for the remaining rows, <br />following Steps 3 and 4. You may use the same module to <br />space ati the rows. When complete, confirm that: <br />• Alt rails ore fitted and aligned. <br />• All footing bolts and lag screws are secure. <br />• The module used for fitting is resting (but not se· <br />cured) in the highest row. <br />I .