Lumber is pressure treated with borates to a level of 0.28 pounds B₂O₃ per cubic foot (pcf) for protection against Formosan termites, or to lower levels for protection against other wood destroying organisms. The National Design Specification (NDS) for Wood Construction (1997 edition) allows wood that has been pressure treated with borates according to AWPA standard C31 to levels of 0.3 pcf B₂O₃ or less to use the same design values as untreated wood.

Contact us at wood@borax.com to request more information on strength and mechanical properties