Grain Systems Tanks PNEG-4075 - Manual (Page 77)

Chapter 7: Roof Assembly
Table 7-1 A-frame installation sequence and temperature cable locations for 75 ft diameter bin
A-frame number Rafter Number Temp Cable Number Radius Location
A1
R1 T3 11.6 ft
R2 T8 26.3 ft
A2
R16 — 11.6 ft
R17 T14 26.3 ft
A3
R11 — 11.6 ft
R12 T12 26.3 ft
A4
R5 — 11.6 ft
R6 T10 26.3 ft
A5
R20 — 26.3 ft
R21 T6 —
A6
R24 T7 26.3 ft
R25 — —
A7
R9 T11 —
R10 — —
A8
R22 — —
R23 — —
A9
R7 T4 —
R8 — —
A10
R18 — —
R19 T2 —
A11
R3 — 26.3 ft
R4 T9 —
A12
R13 T5 11.6 ft
R14 T13 26.3 ft
R15 — —
NA Attach to center collar T1 5 ft
NOTE: A-frames labeled “A1” through “A5” have X-bracing and are installed first. A-frames labeled “A6”
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 75 ft diameter bins
Length from the center collar 216.1 in. (548.89 cm)
Length from 11.6 ft diameter location 148.5 in. (377.19 cm)
Length from 26.3 ft diameter location 56.6 in. (143.76 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-4075 75 Ft Diameter 40-Series Bin 77