7206 WETMORE AVE 2023-01-17 - Laserfiche WebLink

Installing Shared QRail Configuration Optional gauge fabrication: ■ Fabricate an installation gauge by laying two rails on a flat surface. Lay one of the modules on the rails as shown. Be sure the rails are parallel with the edges of the module and with each a other. ■ Carefully measure distance "a" as shown in Image 5.3.3. This is the critical N-S distance between L-foot rail attachment points for shared rails. Carefully cut a dowel, PVC pipe, or other rigid length of material to distance "a." Image 5.3.3 Shared rail distance gauge Array Installation: ■ After determining the location of the array on the roof, mark the location of the lower rail with a chalk line or other suitable method. ■ Determine the rafter locations and mark them on the E-W chalk lines. ■ Install the roof attachments along the chalk line per the manufacturers' instructions taking care to align the L-foot mounting point (mount bolt) as closely as possible to the intersection of the rafter and the chalk line. ■ Install and tighten the L-feet on the two end mounting/flashings taking care to place the upright stays of the L-feet as closely aligned with the marked line as possible with the faces of the stays as closely parallel to the line as possible. ■ Stretch a reference string between the end L-feet and attach the remaining L-feet with the upright stays just touching the reference string and secure ' them in position. ■ Using the gauge fabricated earlier or using a measuring tape or other Image 5.3.4 suitable method, locate and mark the positions of the remaining rows of the array. ■ Install the remaining mounting/flashings and L-feet and check frequently to ensure proper N-S spacing of the upright surfaces of the L-feet stays 77 with the distance gauge. ■ Position the rail in place E-W and hold each end of the rail against the end L-feet. Insert the preassembled T-head rail fasteners in the end L-feet into the slot on the side of the QRail rail. Using a spirit level or other suitable device, set and hold the rail level at the desired height by moving the T-head bolt up or down in the L-foot. See Image 5.3.4. INCORRECT CORRECT ■ Using a 13 mm socket, tighten the rail fastener nuts to 16 ft-lbf (22 N-m)'. (Be sure to allow the bolt head to rotate as far as possible in the T-head channel to ensure full engagement of the bolt head with the sides of the channel). Full engagement is confirmed when the alignment line on the end of the T-bolt is vertical. See Image 5.3.5. Image 5.3.5 ■ With each end of the rail secured and the rail level, proceed along the line of L-feet, inserting the T-head bolts into the rail side channel and tightening as above. If using non-nylon patched t-bolts tighten to 15 ft-lbf(20 N-m) B1 7.2.3-46 22 Jul-2019, Rev 4.2