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[3.2.1] Planning your SWH installations
The installation can be laid out with rails parallel to
the rafters or perpendicular to the rafters. Note
that SWH 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 require
minimum clearances around such installations, and
the user should be directed to also check ‘The Code’.
The width of the installation area equals the length
of one module.
The length of the installation area is equal to:
• the total width of the modules,
• plus 1/4 inch for each space between modules for
grounding mid clamp or 1 inch for standard mid clamp,
• plus 3 inches (1
½ inches for each pair of end clamps).
Figure 6. Rails may be placed parallel or perpendicular to rafters.
Rail cantilever/overhang span shall NOT exceed 25% of footing attachment spacing
9628 Valley Blvd. Rosemead, CA 91770 | Phone 626-579-3288 | [email protected]
SWH Solar Racking Installation Guide | Version 12.10.v2
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