Chapter 7: roof assembly – Grain Systems Tanks PNEG-4072 User Manual

Page 77

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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

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