INSTALLATION GUIDE
PAGE
4
PLANNING YOUR NXT UMOUNT INSTALLATIONS
The installation can be laid out with rails parallel to the rafters or perpendicular
to the rafters. Note that NXT UMOUNT rails make excellent straight edges for
doing layouts.
Center the installation area over the structural members as much as possible.
Leave enough room to safely move around the array during installation.
Some building codes and fire codes require minimum clearances around such
installations, and the installer should check local building code requirements
for compliance.
The length of the installation area is equal to:
•
the total width of the modules,
•
plus 1/2” for each space between modules (for mid- clamp),
•
plus 2" minimum ( 1” minimum for each MODULE END) (This will not be
included when we use the hidden end clamp.)
LAYING OUT ROOF ATTACHMENTS
Locate and mark the position of the roof attachment within the installation
area. Refer to Unirac NXT UMOUNT D&E Guide & U-Builder for rail spans and
cantilevers. Follow module manufacturer installation requirements allowable
spacing based on appropriate mounting locations. Modules should be placed
such that they overhang the rails symmetrically.
NXT Rail Splices are fully structural and do not interfere with roof attachments or Combo Clamps.
There is no need to determine splice locations at this stage.
SYSTEM LAYOUT
Peak (Ridge)
LOW
PROFILE
MODE
HIGH
PROFILE
MODE
Gutter
Eav
e
Eav
e
CAUTION
Rail lengths and locations of L-feet for expansion joints will need to be determined at
this stage in planning the array layout. For expansion joint requirements, See Page 5.
1" Min
1" Min
