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d:UNIRAC Unirac Code-Compliant Installation Manual SolarMount <br />[3.3.1] Planning the installation area <br />Decide on an arrangement for clips, rails, and L-feet (Fig. 22). <br />Use Arrangement A if the full width of the rails contacts the <br />module. Otherwise use Arrangement B. <br />Caution: Ifyou choose Arrangement B, either <br />(1) use the upper mounting holes ofthe L-feet or <br />(2) be certain that the L-feet and clip positions don't <br />conflict. <br />Distance between <br />lag bolt centers , <br />--23*2%" --223/7- <br />- Distance between - <br />module mounting holes <br />T Pv module <br />Module boll <br />-Lag b <br />e <br />If rails must be parallel to the rafters, it is unlikely that they <br />can be spaced to match rafters. In that case, add structural <br />supports - either sleepers over the roof or mounting blocks <br />beneath it. These additional members must meet code; if in <br />doubt, consult a professional engineer. <br />Never secure the footings to the roof decking alone. Such an <br />arrangement will not meet code and leaves the installation <br />and the roof itself vulnerable to severe damage from wind. <br />l-foot --U]1.b <br />Distance between <br />- lag bolt centers- <br />1/6-34" - - <br />- Distance between - <br />module mounting holes <br />Leave enough room to safely move around the array during <br />installation. The width of a rail-module assembly equals the <br />length of one module. Note that L-feet may extend beyond 'jf- -- '3- <br />the width of the assembly by as much as 2 inches on each <br />side. The length of the assembly equals the total width of the <modules. <br />Figure 22. Clip Arrangements A and B <br />¤