So far as I'm aware, scaffold boards are... softwood from a sawmill. They just happen to be quite chunky.robgil said:scaffold boards....would probably outlast soft wood from a sawmill.
Interesting. I wonder if scaffold boards are regarded as "residential use" ?citizensmith said:* The most common wood preservative traditionally used (chromated copper arsenate or CCA) was phased out from all residential use on December 31, 2003.