Chapter 7: roof assembly – Grain Systems Tanks PNEG-4075G User Manual
Page 78
Table 7-1 A-frame installation sequence and temperature cable locations for 75 ft diameter bin (cont'd.)
A-frame number
Rafter Number
Temp Cable Number
Radius Location
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.
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Pneg-4075G 75 Ft Diameter 40-Series Bin