Install Manual

NXT DESIGN RULES
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Allowable
Spans (in.)
AT1 Allowable Pressure (psf)
UP Down DownSlope Lateral
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
72 21.0 34.6 19.5 32.2 19.9 19.9 14.9 24.6
60 25.2 41.5 23.4 38.6 14.5 23.9 17.9 29.5
48 31.5 51.9 29.3 48.3 18.1 29.8 22.3 36.9
36 42.0 69.2 39.0 64.4 24.1 39.8 29.8 49.1
24 63.0 103.9 58.5 96.5 36.2 59.7 44.7 73.7
12 125.9 207.7 117.0 193.1 72.4 119.4 89.4 147.4
Allowable
Spans (in.)
CT1 Allowable Pressure (psf)
UP Down DownSlope Lateral
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
72 25.4 41.8 19.5 32.2 14.7 24.3 7.0 11.5
60 30.4 50.2 23.4 38.6 17.6 29.1 8.3 13.8
48 38.0 62.7 29.3 48.3 22.1 36.4 10.4 17.2
36 50.7 83.7 39.0 64.4 29.4 48.5 13.9 22.9
24 76.1 125.5 58.5 96.5 44.1 72.8 20.9 34.4
12 152.1 251.0 117.0 193.1 88.2 145.6 41.7 68.8
Allowable
Spans (in.)
CT2 Allowable Pressure (psf)
UP Down DownSlope Lateral
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
72 22.6 37.4 19.5 32.2 15.0 24.8 6.0 9.9
60 27.2 44.8 23.4 38.6 18.0 29.7 7.2 11.9
48 34.0 56.0 29.3 48.3 22.5 37.2 9.0 14.9
36 45.3 74.7 39.0 64.4 30.0 49.5 12.1 19.9
24 67.9 112.1 58.5 96.5 45.0 74.3 18.1 29.8
12 135.9 224.2 117.0 193.1 90.1 148.6 36.2 59.7
Allowable
Spans (in.)
CT5 Allowable Pressure (psf)
UP Down DownSlope Lateral
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
Portrait
Modules
Landscape
Modules
72 40.5 66.8 19.5 32.2 10.9 18.0 4.6 7.6
60 48.6 80.2 23.4 38.6 13.1 21.6 5.5 9.1
48 60.7 100.2 29.3 48.3 16.3 27.0 6.9 11.4
36 81.0 133.6 39.0 64.4 21.8 35.9 9.2 15.2
24 121.5 200.4 58.5 96.5 32.7 53.9 13.8 22.8
12 243.0 400.8 117.0 193.1 65.4 107.8 27.7 45.7
ASSUMPTIONS AND USE DETAILS
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Pressure limits refer to Up, Down, Downslope, and Lateral PSF.
AT1 Flat Tile solar Hook with NH CT1/CT2 Spanish Fixed Hook
Plate with NH
CT5 Universal Solar Hook
W/Adjustable base with NH
See design pressure table index for representative geographic pressures or refer to
Pressure tables for Flush Mounted Systems at Unirac.com.
For each load direction, index the Allowable span for which the Allowable Pressure
does not exceed the Design Pressure.
The Allowable Span shall be the minimum of that for each load direction. Pressure
limits apply to all roof zones.
Solar hooks not recommended for use in hurricane zones.
Tabulated allowable pressures assume continuous rail spans and may need to be
divided by 1.25 for some rail span configurations.
Pressure limits were calculated from the allowable Solar hooks loads, which are
provided below for reference.
Allowable loads (lbs)
HOOK TYPE UP DOWNLOAD DOWNSLOPE LATERAL
AT1 341 317 196 242
CT5 658 317 177 75
CT1 412 317 239 113
CT2 368 317 244 98
PRESSURE LIMIT MODIFICATION GUIDELINES
Portrait Module Height 65 in
Landscape Module Width 39.4 in
Tabulated Pressure were calculated using a module size of 39.4 in X65 in
These pressure limits may be increased or decreased linearly
To modify pressure limits provided, follow these simple steps:
For portrait modules, multiply the given pressure limit by (65”/New module length)
For Landscape modules, multiply the given pressure limit by (39.4”/New module
width)
INSTALLATION GUIDE
PAGE
SOLARHOOKS
PRO SERIES