QRail Installation

BI 7.2.3-46
Jul-2019, Rev 4.2
21
Installation of the QRail system on most roof-types requires that any penetrations of the roof surface be flashed in
accordance with the appropriate local codes and roofing best practices.
5.3 QRail Installation on Roof-top

A er determining the location of the array on the roof, mark the rail locations with chalk lines or other suitable method.

Determine the ra er locations and mark them on the E-W chalk lines.

For standard rail configuration installations, install roof attachments per the mount manufacturer’s instructions.

Install the roof attachments along the chalk line per the manufacturer’s 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.

Loosely install the T-bolts on the L-foot with the T-bolt facing the ridge of the roof. The L-feet may be aligned with the
base of the “L” facing north or south.

Position the rail in place E-W and hold each end of the rail against the end L-feet. Insert the preassembled T-bolt rail
fasteners in the end L-feet into the slot on the side of the QRail. Using a spirit level or other suitable device, set and hold
the rail level at the desired height by moving the T-bolt up or down in the L-foot.

Using a 13 mm socket, tighten the rail fastener nuts to 16  -lbf (22 N-m)
1
. Be sure to allow the bolt head to rotate as far
as possible in the T-bolt 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.

Proceed along the line of L-feet, inserting the T-bolts and tightening as above.

Position the rail and L-feet N-S and secure the L-feet to the mount according to the
mount manufacturer’s instructions.

Repeat the above steps for each rail in the array.
Installing Two-Rail Configuration
NOTE!
Where site conditions and safety
considerations allow, it may speed and simplify
the installation to splice rails on the ground
then transport them to the roof.
If rails are to be spliced, the splice should be
installed prior to installing the rails onto the
L-feet or other roof attachments. See Section
5.2 for rail splicing instructions.
Image 5.3.2
T-bolt correctly positioned for insertion
INCORRECT CORRECT
DANGER
Rail must be installed so the mount is
fully engaged (edge of rail line to line
with edge of mount) and maintain a
minimum of 3/4” from the end of the rail
to center of T-bolt.
1
If using non-nylon patched t-bolts tighten to 15  -lbf (20 N-m)