Instructions / Assembly

Page
3
Tile Hook Roof Universal Mount
Installation Manual
Engineering Guide Limitations
• Flush roof installations only
• Roof slope must be 0-45 degrees (0/12 - 12/12 pitch)
• Installation must have at least 4 modules grouped
together
• Module dimensions must be less than 42”x65”
• Surrounding ground area must not slope more than 10
degrees
• Location must fall into Exposure Category B or C
• Building height must be less than or equal to 30’0”
Table 2. Lag pull-out (withdrawal) capacities
(lbs) in typical roof lumber (ASD)
Specic
Gravity
Lag screw specications
5/16” shaft,*
per inch thread depth
Douglas Fir, Larch 0.50 266
Douglas Fir, South 0.46 235
Engelmann Spruce, Lodgepole Pine (MSR
1650 f & higher)
0.46 235
Hem, Fir, Redwood (Close Grain) 0.43 212
Southern Pine 0.55 307
Spruce, Pine, Fir 0.42 205
Spruce, Pine, Fir (E of 2 million psi &
higher grades of MSR & MEL)
0.50 266
Please refer to Technical Support for more
information on roof zones
• Span for Roof Zone 2 = 1/2 max span
• Span for Roof Zone 3 = 1/3 max span
• Max Cantilever = 1/3 max span
Please refer to Unirac Technical Support for installations that
do not comply with the limitations above.
Use Table 2 to select a lag bolt embedment
depth to satisfy your Uplift Point Load Force
(lbs), requirements.
It is the installer’s responsibility to verify
that the substructure and attachment
method is strong enough to support the
maximum point loads calculated.
Sources: American Wood Council, NDS 2005, Table 1
Notes: (1) Thread must be embedded in the side grain of a rafter or other structural member intergral with the building structure.
(2) Lag bolts must be located in the middle third of the structural member.
(3) These values are not valid for wet service.
(4) This table does not include shear capacities. If necessary, contact a local engineer to specify lag bolt size with regard to shear forces.
(5) Install lag bolts with head and washer flush to surface (no gap). Do not over-torque.
(6) Withdrawal design values for lag screw connections shall be multiplied by applicable adjustment factors if necessary. See table 10.3 in
the American Wood Council NDS for Wood Construction
The table above is subject to the limitations listed below. It is intended as a quick reference guide based on the most
common congurations. Please refer to load tables on pages 5, 6 and 7 for design loads.
Table 1. Tile Hook Spacing Chart
Snow Load 0 5 10 15 20 25 30 35 40
Basic Wind Speed
85 mph 54” 54” 47” 40” 35” 31” 28” 26” 23”
90 mph 48” 48” 44” 38” 33” 30” 27” 25” 23”
110 mph 31” 31” 31” 31” 28” 25” 23” 21” 20”
120 mph 26” 26” 26” 26” 25” 23” 21” 20” 19”
150 mph 16” 16” 16” 16” 16” 16” 16” 16” 15”