Before you decide on
your fasteners take a moment to decide which stainless grade you
need? You have a choice of stainless grade with many of our
Type 304, 305 or 316 Stainless Steel. All three grades of stainless
steel are nickel/chromium and all are non-magnetic.
Type 304 stainless meets virtually all requirements except repeated
exposure to sea water.
Type 305 stainless also meets virtually all requirements. Has more
resistance than 304 and is especially resistant to the tanning
produced by Cedar and other lumber. But for a harsh coastal
environment it is better to use 316 SS.
Type 316 is better in a coastal or harsh environment since it
contains more nickel as well as 2% to 3% molybdenum, giving it
superior corrosion resistance.
All of the above grades are a major advance over other commercial
There is absolutely no question that your best bet is stainless
steel for any of the treated timbers and that includes wood
foundations in particular, since the fasteners here are subjected to
constant high humidity in addition to chemical attack.
Stainless-steel fasteners cost only a small amount more related to a
total project budget, but they can have a significant effect on the
life span of a structure.