Grain Systems Tanks PNEG-4135 - Manual (Page 89)

Chapter 7: Roof Assembly
Figure 7-11 Location of purlins for a 135 ft (41.1 m) diameter bins
A Purlin number 1 (CTR-0297) E Purlin number 5 (CTR-0309)
B Purlin number 2 (CTR-0298 and CTR-0503)
(laminated) F Purlin number 6 (CTR-0310)
C Purlin number 3 (CTR-0299 and CTR-0300)
(laminated) G Purlin number 7 (CTR-0311)
D Purlin number 4 (CTR-0308 and CTR-0504)
(laminated) H Purlin number 8 (CTR-0336)
Pneg-4135 135 Ft Diameter 40-Series Bin 89