© 2012/EN Zep Solar, Inc. reserves the right to make specifications changes without any prior notice. All rights reserved.
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Document #800-0351-001 Rev B
Page 10
ZS COMP INSTALLATION MANUAL FOR COMPOSITION SHINGLE ROOFS - U.S.
Step 2:
Obtain Spacing and Cantilever Allowances
After gathering the project data, the designer can either look up the allowances in the Span Tables,
or s/he can enter the project information into the Zepulator in order to obtain the spacing and can-
tilever allowances. (The terms “spacing” and “span” are interchangeable.)
Figure 3.1 Spacing and Cantilever: Composition Shingle Roof With Vertical Rafters
Note the following points:
•
Interlocks are always aligned perpendicular to the module drop-in direction.
•
Leveling Foot minimum distance from module corner is 2 inches or 50 mm to center of
threaded Leveling Foot stud.
•
Allow a gap between modules of 1/2 inch or 13 mm, in both North-South and East-West
directions; actual tolerance is 1/4”-3/4”.
Step 3:
Create Array Layout and Bill of Material
Array Layouts and a Bill of Material can be created using the Zepulator online design tool or using
a CAD program. The designer may also choose to generate an initial layout in the Zepulator and
then further refine the design using another program. Zep Solar, Inc. provides downloadable CAD
blocks on the Zep Solar web site for Zep Solar components. Note that the Bill of Material created
by the Zepulator does not include hardware pricing, since that may depend on the distribution
channel and other factors.
North-South spacing
is determined by
module dimension
plus 1/2” or 13mm
East-West spacing is a multiple of
the distance between rafters
Down-roof
Module Cantilever: Leveling Foot center to
module edge.
Maximum cantilever is always 1/3 of
the maximum allowable spacing.
Roof attachment and Leveling Foot
PV module
Ground Zep
Array Skirt
Interlock
1/2 inch gap
(13mm)
