Fasteners for PT

Chromate copper arsenate (CCA) was phased out of pressure treated products by 2003 in favor of either alkaline copper quaternary (ACQ) or copper azole (CA), both of which contain higher concentrations of copper than CCA. What types of fasteners are recommended for use with current formulations of pressure treated wood?
A. stainless steel
B. aluminum
C. hot dipped galvanized
D. electric galvanized

AnswerA. Stainless steel and C. Hot dipped galvanized. ACQ and CA formulations are very corrosive to most other fasteners.

ARE 4.0 exam prep: BDCS