Grain Systems Tanks PNEG-4072 - Manual (Page 77)

Chapter 7: Roof Assembly
Table 7-1 A-frame installation sequence and temperature cable locations for 72 ft diameter bin (cont'd.)
A-frame number Rafter Number Temp Cable Number Radius Location
A3
R13 T3 9.3 ft
R14 T9 26 ft
A4
R1 T1 9.3 ft
R2 T5 26 ft
A5
R17 T10 26 ft
R18 — —
A6
R5 T6 26 ft
R6 — —
A7
R21 — —
R22 — —
A8
R9 — —
R10 — —
A9
R15 — —
R16 — —
A10
R3 — —
R4 — —
A11
R23 T12 26 ft
R24 — —
A12
R11 T8 26 ft
R12 — —
NOTE: A-frames labeled “A1” through “A4” have X-bracing and are installed first. A-frames labeled “A5”
through “A12” are standard A-frames. The empty spaces that are not labeled must have purlins
installed between the rafters after all the A-frames are secured. The numbers reflect the recom-
mended installation sequence of the A-frame assemblies.
Table 7-2 Starting lengths for temperature cables for 72 ft diameter bins
Length from the center collar None
Length from 9.3 ft diameter location 179.2 in. (455.17 cm)
Length from 26 ft diameter location 59.6 in. (151.38 cm)
The temperature cable lengths in the chart above are the distances from where the temperature cable
attaches to the rafter or the center collar to the top ring. To calculate the correct temperature cable length,
add 32 inches for each bin ring to the starting length. Temperature cables must terminate above any
unload equipment and be secured in place with twine. DO NOT allow cables to become tangled in unload
equipment.
Pneg-4072 72 Ft Diameter 40-Series Bin 77