Grain Systems Tanks PNEG-1092 - Manual (Page 65)

10. Roof Assembly Instructions
PNEG-1092 30° Bin Roof Construction 65
Temperature Cable Support Package
Temperature Cable Support Packages - for Eave Heights Greater than
40'-5'' (12.32 m) Instructions
CRP-5827 through CRP-5290 (27'-36' (8.23-10.97 m) Support System)
1. All 27' and 30' (8.23 m and 9.14 m) packages shall span one roof panel as shown in Figure 11A on
Page 66 . All 33' and 36' (10.05 m and 10.97 m) packages shall span three (3) roof panels as shown
in Figure 11B on Page 66 .
2. A rafter support system (included in each package) will be necessary for temperature cable
installation in commercial tanks 27' to 36' (8.23 m to 10.97 m) in diameters that have an eave height
of greater than 40'-4" (12.29 m).
3. One package should be provided for each cable in the tank with the exception of the center cable.
4. All packages include hanging angle and a cable support channel.
5. Each set of rafters should carry only one temperature cable.
6. Each kit will contain two (2) rafter sections, which when spliced will reach from the center collar to
the bin wall. The bottom rafter section (CRP-4759) will bolt into the stiffener bracket (CRP-5333).
7. The rafter packages will utilize the standard (PR-1874) splice plate but will have no purlins.
8. The upper rafter sections (CRP-5418 (27') (8.23 m), CRP-5373 (30') (9.14 m), CRP-5306 (33')
(10.06 m) and CRP-5274 (36') (10.97 m)) will be bolted into the center collar by use of the
clips provided.
9. Once the rafters are in place, field drill the holes to bolt the support angle (CRP-5786 or CRP-5787)
into the roof rafter (See Figure 11B on Page 66) and attach with 3/8" diameter bolts.
10. Attach the cable attachment bracket (CRP-5213) in the center of the support channel (CRP-5419 or
CRP-5285) as illustrated in Figure 11B on Page 66 and hang the cable.
11. If it is desired to support the cable from the flange of the support channel (CRP-5419), it will be
necessary to reinforce the flange with a 12" section of 3" x 3" x 3/16" angle.
12. No more than one cable should be supported from a pair of roof rafters.
13. This package will allow a maximum radius of: (27' equals 11.84') (8.23 m equals 3.61 m),
(30' equals 13.15') (9.14 m equals 4.01 m), (33' equals 13.31') (10.06 m equals 4.06 m),
(36' equals 14.49') (10.97 m equals 4.42 m). These radii represents the maximum radius that the cross
members will span. These are not recommended installation locations. 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.