Grain Systems PNEG-1510 - Manual (Page 13)

3. Foundation Requirements
PNEG-1510 Top Dry 24', 30' and 36' Manual Batch 13
Duct and Drying Fan Pad Optional
Placement of the Duct Fan Pad: GSI Top Dry Duct System only.
Refer to Figure 3E to determine the duct pad size.
1. The top of this pad should be level with the top of the bin’s foundation.
2. Recommended pad thickness is 4" minimum.
3. Front of pad should be perpendicular to bin wall.
Figure 3E