QRail Installation

BI 7.2.3-46
Jul-2019, Rev 4.2
BI 7.2.3-46
Jul-2019, Rev 4.2
22
INCORRECT CORRECT
Array Installation:

A er 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 ra er 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 ra er 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
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
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.

Using a 13 mm socket, tighten the rail fastener nuts to 16  -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.

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.
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
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.”
Installing Shared QRail Configuration
Image 5.3.3
Shared rail distance gauge
Image 5.3.4
a
Image 5.3.5
1
If using non-nylon patched t-bolts tighten to 15  -lbf (20 N-m)