Western Wood Preservers Institute

Rated 5.00(3) — Western Wood Preservers Institute

The RTA Tie Grading Guide offers detailed information and training on specifications, grades and limiting defects for preservative treated wood rail ties.

Rated 5.00(1) — Western Wood Preservers Institute

The Wood Pole Guide app provides critical information needed to properly specify and use treated wood poles. Explore the preservatives used to treat wood poles available in the market today, as well as the AWPA Use Category standards that set the required

Rated 3.67(3) — Western Wood Preservers Institute

Version 2.1 - rel. 04/02/17Learn everything you need to know about how to identify, specify and use preservative treated wood.Explore the preservatives used today that extend the service life of wood from years to decades. Understand the AWPA Use Category