Grain Systems PNEG-1853 - Manual (Page 17)

4. 12' Outside Catwalk Installation Instructions
PNEG-1853 12' Tower Dryer Fan Style Catwalk Assembly 17
5. Each plank should be overlapped at the edges and bolted with 5/16"-18 x 3/4" YDP grade 8 or
grade 8.2 bolts (S-4303) and 5/16"-18 YDP grade 2 nuts (S-3611). (See Figure 4N.)
Figure 4N
Truss bolt 5/16"-18 x
3/4" YDP grade 8 or
grade 8.2 (S-4303)