A325 bolt grade for outdoor 450 degree ductwork?
A325 bolt grade for outdoor 450 degree ductwork?
(OP)
Which is a better choice for structural connections for outdoor ductwork that can reach 450 degrees?
1. A325 Type 1 bolt (galvanized finish), F436 washer (galvanized finish), and DH A563 nut
2. A325 Type 3 bolt (plain finish), F436 washer (plain finish), and DH3 A563 nut
1. A325 Type 1 bolt (galvanized finish), F436 washer (galvanized finish), and DH A563 nut
2. A325 Type 3 bolt (plain finish), F436 washer (plain finish), and DH3 A563 nut





RE: A325 bolt grade for outdoor 450 degree ductwork?
http://www.galvanizeit.org/hot-dip-galvanizing/how...
RE: A325 bolt grade for outdoor 450 degree ductwork?
RE: A325 bolt grade for outdoor 450 degree ductwork?
RE: A325 bolt grade for outdoor 450 degree ductwork?
http://www.eng-tips.com/viewthread.cfm?qid=279402