Attachment locations of purlins to rafters, Chapter 7: roof assembly – Grain Systems Tanks PNEG-4090A User Manual
Page 84
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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 95
,
bling Purlin Number 2, page 93
Assembling Purlin Number 3, page 91
,
,
Assembling Purlin Number 5, page 87
, and
Assembling Purlin Number 6, page 85
.
Figure 7-13 Location of purlins for a 90 ft (27.4 m) diameter bins
A
Location of purlin number 1 (CTR-0430)
D
Location of purlin number 4 (CTR-0433)
B
Location of purlin number 2 (CTR-0431)
E
Location of purlin number 5 (CTR-0434)
C
Location of purlin number 3 (CTR-0432)
F
Location of purlin number 6 (CTR-0435)
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Pneg-4090A 90 Ft Diameter 40-Series Bin