Stainless Steel Fasteners and Auminum
Stainless Steel Fasteners and Auminum
(OP)
Sample situation:
Aluminum angle ledgers attached to wall, wall sign with aluminum angle stringer to hang off ledger. What type of bolts are best to fasten along the length (exclude aluminum bolts)?
Steel manual and other sources show that a mechanically deposited or hot dipped bolt would be best, with stainless steel being a second best choice. All assuming exterior exposure, but not in a terribly corrosive environment or receiving salt spray. Couple this with aluminum and zinc being super close on galvanic series.
I am curious about this because I feel like literature says one thing, but I get comments back from plan checkers and other PE's from third party reviewers saying another thing..."people" aare frequently championing stainless steel "just because" of the name of it (I feel).
Can we field some comments please?
Aluminum angle ledgers attached to wall, wall sign with aluminum angle stringer to hang off ledger. What type of bolts are best to fasten along the length (exclude aluminum bolts)?
Steel manual and other sources show that a mechanically deposited or hot dipped bolt would be best, with stainless steel being a second best choice. All assuming exterior exposure, but not in a terribly corrosive environment or receiving salt spray. Couple this with aluminum and zinc being super close on galvanic series.
I am curious about this because I feel like literature says one thing, but I get comments back from plan checkers and other PE's from third party reviewers saying another thing..."people" aare frequently championing stainless steel "just because" of the name of it (I feel).
Can we field some comments please?





RE: Stainless Steel Fasteners and Auminum
Normally, Stainless Steel (passive) is at the topmost of a Galvanic Series and also farthest from Aluminium. SS bolts are also readily available.
RE: Stainless Steel Fasteners and Auminum
What materials make the lowest-potential galvanic couple doesn't always align with a) what people's expectations are or b) what will be best cosmetically.
RE: Stainless Steel Fasteners and Auminum