Class-a fire-protected wood building products provided with class-a fire protection, and surface treatment process for producing the same

Abstract

A Class-A fire-protected wood product include: a wood product having exterior wood surfaces and being selected from the group consisting of finger-jointed wood products, dimensioned lumber products, cross-laminated timber (CLT) products, and engineered wood products (EWPs); and thin potassium salt crystalline coatings formed on the exterior wood surfaces of said wood product during a surface treatment process involving the coating of said exterior surfaces with an environmentally-clean fire inhibiting liquid chemical composition, so as to produce a Class-A fire-protected wood product having Class-A fire-protected wood surfaces, when water molecules in said environmentally-clean fire inhibiting liquid chemical composition evaporate to the environment during drying and formation of said thin potassium salt crystalline coatings. The thin potassium salt crystalline coatings protect the treated exterior surfaces against fire ignition and flame spread in the presence of fire, by interrupting the combustion phase of the fire by one or more pathways, and inhibiting fire ignition and flame spread.

Dependencies are inferred from the claim text.