Grain Systems PNEG-1276 - Manual (Page 36)

36 PNEG-1276 Top Dry Autoflow Construction Manual 24', 30' and 36'
8. Installation
Rafter Installation and Floor Support Angle Attachment
When installing the rafters, set the lower clip end on the “C” eave member. Leave the bolts to the center
collar and the eave member loose until all rafters are in place. Use 3/8" x 1" hex bolts and nuts to connect
the center collar and eave member to three (3) rafters at 90° to each other. These first three (3) rafters
should all face the same direction. Every other rafter should alternate direction. IMPORTANT: There are
left and right rafters. Be sure to alternate left, right, left, right, etc. The floor sheet support purlins can now
be installed using 5/16" x 3/4" bin bolts. There are two (2) different lengths of purlins to fit between the
rafters. Insert the straight tab of the purlin through the upper slot in the left hand rafter when looking toward
the bottom of the rafters. Bolt the bent end of the purlin to the right hand rafter in the upper two (2) holes.
After inserting the next purlin tab, bolt the first purlin tab to the second purlin. Continue around the bin
alternating lengths as the rafter facings did. Tighten all bolts.
Figure 8A
Figure 8B
Nominal Diameter
of Tank (Ft.)
Long Support Short Support
24' TD-100720 TD-100721
30' TD-100650 TD-100651
36' TD-100740 TD-100741