Attachment locations of purlins to rafters, Chapter 7: roof assembly – Grain Systems Tanks PNEG-4072G User Manual
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Attachment Locations of Purlins to Rafters
Purlins are horizontal members between the rafters that give support to the roof structure. The length of
the purlin determines its location on the A-frame assembly.
The following reference depicts a completely assembled A-frame roof rafter section with X-bracing
installed. For more information, see the following sections:
Assembling Purlin Number 1, page 90
bling Purlin Number 2, page 88
,
Assembling Purlin Number 3, page 86
,
Assembling Purlin Number 5, page 81
, and
Assembling Purlin Number 6, page 80
Figure 7-9 Location of purlins for a 75 ft (22.86 m) diameter bin
A
Location of purlin number 1 (CTR-0616)
D
Location of purlin number 4 (CTR-0619)
B
Location of purlin number 2 (CTR-0617)
E
Location of purlin number 5 (CTR-0620)
C
Location of purlin number 3 (CTR-0618)
F
Location of purlin number 6 (CTR-0621)
Pneg-4072G 72 Ft Diameter 40-Series Bin
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