3. 30'-54' Roof Instructions
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PNEG-1801
Special 30'-54' Diameter High Snow Roof Rafter Instructions
30' Diameter 60 PSF Lower Roof Truss Assembly
Figure 3M Lower Purlin Connection
Ref #
Part #
Description
A
CRP-7198
Lower Purlin
B
CRP-7034
Lower Roof Rafter
C
CRP-7196
Purlin Clip
D
1/2" x 1-1/2" Full threaded bolt (S-3728) with 1/2" hex nut (S-3729) with
washer (S-2121) on both sides. Purlin to purlin clip connection.
E
Flange bolt 3/8"-16 x 1-1/2" JS500 grade 8 or grade 8.2 full thread (S-7486) and
flange nut 3/8"-16 JS500 (S-9426) at purlin clip to rafter connection.
Detail I