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4 SolarMount Unirac Code-Compliant InstallationManual -d:UNIRAC <br />[3.2.2] Laying out L-feet <br />L-feet (Fig. 7) can be used for attachment through existing <br />roofing material, such as asphalt shingles, sheathing or sheet <br />metal to the building structure. <br />Use Figdre 8 or 9 below to locate and mark the position off:he <br />L-feet lag screw holes within the installation area. <br />If mill tiple rows are to be installed adjacent to one another, it <br />is not likely that each row will be centered above the>rafters. <br />Adjust as needed, following the guidelines in Figure 9 as <br />closely as po5sible. <br />Figure 7 <br />p- Overhang 25% L:max <br />- Foot spacing/-I <br />0 Rail·Span "L" 11 <br />25% of module <br />width <br />0 10 -r„ <br />1112-1361,1 _ti f <br />1-j 1 <br />: 50% of module <br /> -_ 1 width (TYP) <br />li- <br />9&1 / <br />Lower root edge <br />1 <br />Ratters <br />(Building Structure) <br />Note: Modules must be <br />centered symnielricnfly on the· <br />rails (+/- 29. tf thisisnotthe <br />case, call Unirador assistance. <br />Figure.8. Layout with rails perpendicular to rtifters. <br />Installing L-feet <br />Drill pilot holes through the roof into the <br />center o f the rafter at each L-foot lag screw <br />hole location. <br />squirt sealant into the hole, and on the shafts <br />of the lag screws. Seal the underside of the L- <br />feet with a suitable sealant. Consult with the <br />corhpany providing the roofihg warranty. <br />Securely fasten the L-feet to the roof with <br />the lag screws. Ensure that the L-feet face as <br />shown in Figure 8 and 9. For greater ventila- <br />tion, the preferred method-is-te-place-t:lic <br />single-slotted square side of the L-foot against <br />the roof with the double-slotted side perpen- <br />dicular to the rool', Ii- Iheinstaller choos-es-ta-- <br />mount the L-foot with the long leg against the <br />roof, the bolt slot closest to the b'end must be <br />tised. <br />25% of module:width:- <br />Cower-roof·edge: <br />Rafters (Building Structurel <br />11 8 <br />11 <br />2 ===J== = = 11, <br />11 <br />11 <br />H <br />H <br />50% of,module width <br />156-1°4. -4---1 <br />ITC + 3 <br />Fdot spacing/1 Ipl1ail Span, L \-,3*--'' <br />1 /1 <br />Overhang 25% L max <br />t <br />Note: Modules must be <br />centered symmetrically on the <br />rails (+/-29. U this is nol the <br />case, call Unira:for- assistance. <br />- Figure-9.-Layoutiwithrails parallel to rafters. <br />Pase <br />17