FX Rail-Less Engineering

FX Engineering & Design Guide
IRONRIDGE CONFIDENTIAL
Page 17 of 21
For the given site conditions, maximum spans and cantilevers are as follows:
Therefore, for all Roof Zones, Mounts can be placed up to (4) rafters apart (16” x 4 = 64”).
Example 2
Using the rules outlined above, place Mounts and Bridges on the array shown. Assume all
modules are in Roof Zone 1.
RZ1 RZ2 RZ3
Max Span 65" 65" 65"
Max Cantilever 22" 22" 22"
Qty.
Mounts 10
Bridges 2
Trim 2
Bill of Materials
Wind Speed 115mph Roof Tilt 30°
Ground Snow Load 40 psf Rafter Spacing 16” OC
Exp. Category B