Grain Systems Tanks PNEG-1092 User Manual
Page 33
7. Farm Roof Assembly
PNEG-1092 30° Bin Roof Construction
33
Roof Assembly for 33' through 48' Roofs with Standard Peak Cap
NOTE: Additional instructions are given on the following pages for 42' diameter and larger farm bin and
commercial bin roofs. For 36' diameter hopper tanks (NCHT), refer to special instructions included
in the 36' NCHT manual.
After assembling the lower center collar “Z” ring, build a roof center support to hold it in place at the proper
height, as shown in
. A simple structure composed of a sturdy cross-arm
attached to a pole and supported by a platform or scaffolding in the center of the bin will be sufficient.
Place eave clips inside the bin wall to maintain an opening around the top of the sidewall. This allows
condensation, which normally collects on the underneath side of the roof panels, to flow freely to the
outside of the bin, thus avoiding possible grain spoilage.
Now you are ready to place the first group of roof sheets in place as shown in
. These
eight (8) panels will keep the peak assembly centered. Continue placing roof sheets (with a consistent lap
pattern) at intervals around the bin to distribute the weight evenly. DO NOT TIGHTEN BOLTS UNTIL THE
ROOF IS COMPLETELY ASSEMBLED. Once all roof sheets are in place and the bolts are tightened, the
center ring and flashing assembly may be placed on top of the panels. Place a flashing seam over a
“Z” collar seam to ensure correct alignment.
Refer to Figure 7M on Page 34.
The peak cap and slide rods
may then be put in place to finish the roof. On stiffened tanks, particularly on NCHT series hopper
tanks, location of the manway panel and roof ladder in relation to the stiffeners is crucial for proper
installation of the ladder systems. Refer to PNEG-1451 for detailed instructions on the NCHT series
and PNEG-1420 for flat bottomed stiffened tanks (FCDL, NCL and WCL series). These manuals are
included with the ladder and safety cage packages.
Figure 7L