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Chapter 7: roof assembly – Grain Systems Tanks PNEG-4075G User Manual

Page 78

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Chapter 7: Roof Assembly

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