Grain Systems PNEG-1853 - Manual (Page 25)

4. 12' Outside Catwalk Installation Instructions
PNEG-1853 12' Tower Dryer Fan Style Catwalk Assembly 25
Installing Ladder Bracket (GT1-2088)
1. Install the ladder bracket (GT1-2088) to the ladder opening toe board (GT4-1465) using 3/8"-16 x 1"
YDP grade 8 or grade 8.2 bolts (S-7927) and 3/8"-16 ZN grade 5 nuts (S-968). (See Figure 4Y.)
Figure 4Y