Grain Systems Tanks PNEG-1092 - Manual (Page 76)

76 PNEG-1092 30° Bin Roof Construction
12. 48' Farm Roof Support System
CRP-6263 (48' (14.63 m) Support System) Eave Height
Less than 40'-5"
1. All 48' (14.63 m) packages shall span three (3) roof panels as shown in Figure 12A on Page 77 .
2. One package should be provided for each cable in the tank with the exception of the center cable.
3. The package includes bracing Z-channels for the roof rafters, hanging angle and cable
support channel.
4. Each set of rafters should carry only one temperature cable.
5. Once the farm roof system has been installed, installation of the cable support packages may
proceed as follows.
6. Remove outer splice (CRP-6258) and replace it with CRP-6262 (Z-channel reinforcement).
Use 3/8" x 1" bolts and 3/8" nuts for all connections.
7. Attach left and right hand angle to roof reinforcement channel. Field drill if necessary to obtain
proper location.
8. Attach the cable attachment bracket (CRP-5213) in the center of the support channel (CRP-5285) as
illustrated in Figure 12A on Page 77 and hang the cable.
9. If it is desired to support the cable from the flange of the support channel (CRP-5285), it will be
necessary to reinforce the flange with a 12" section of 3" x 3" x 3/16" angle.
10. No more than one cable should be supported from a pair of roof rafters.
11. This package will allow a maximum radius of (48' equals 19.22') (14.63 m equals 5.86 m). This radius
represents the maximum radius that the cross member will span. This is not a recommended
installation location. Install according to the temperature cable manufacturer’s recommendations.
For a greater radius, the recommendation shown in this manual for temperature cable installation
must be used (using field cut, hot rolled sections), however a rafter support package must still
be used.