Ultra Rail Installation Manual

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9
Pre-Installation Requirements
Design Guidance
1) Layout the modules in the available roof area. Adjacent modules in the same row are spaced 1/2” apart by Mid Clamps.
Adjustable End Clamps require an additional 1” of rail extending past module frame, while Universal End Clamps require no
extra rail. When installing multiple rows of modules, a minimum spacing gap of 1/8” should be used between rows.
2) Draw the roof framing member location on the layout to identify where roof attachments can be installed.
3) Determine site conditions for calculating the engineering values, confirm site conditions and code versions comply with
local AHJ requirements.
4) Reference site conditions and system specifications in Ultra Rail Structural Engineering Report to determine maximum
attachment spacing and cantilever values.
5) Draw roof attachment locations on layout based on maximum attachment spacing and cantilever values.
6) Confirm design complies with UL 2703 Listing for Mechanical Loading. For more details on the mechanical loading details
see the Mechanical Loading Specifications section.
7) To simplify the design process and automatically generate a bill of materials (BOM) for the mounting system, use the Ultra
Rail Configuration Tool located on the SnapNrack website. Always refer to Approved Module Lists in Installation Manuals to
ensure installation complies with UL 2703 Listing.
8) Mark distance from array edge to identifiable roof features in x and y axes.
9) Insert SnapNrack installation details in to design set specific to the project requirements.
TO EGC
GROUND PATH
SNAPLINK SLIDER GROUND LUG
EQUIPMENT GROUNDING CONDUCTOR
26'-4"
16'-6"
19'-9"
3'-0"
3'-0"