Simpson Strong-Tie HDU8 Holdown with SDS Screws The PA35 purlin anchor is

The PA35 purlin anchor is made of 12 gauge galvanized steel

Hex Machine Bolts are available in steel with a hot dip galvanized coating

or in basements

Kit Contains: 20-HM9

Simpson Strong-Tie HDU8 Holdown with SDS Screws The PA35 purlin anchor isThe Simpson Strong Tie HDU8 SDS2. 5 holdown is pre deflected during the manufacturing process, virtually eliminating deflection under load due to material stretch. They use Simpson Strong Tie Strong Drive SDS screws (included) which install easily, reduce fastener slip and provide a greater net section when compared to bolts. Anchor with a 7 8 anchor. Made of 10 gauge galvanized steel.