ICC Evaluation Services Acceptance Criteria 479 Wood Structural Panels with a Factory-Applied Fire-Retardant Coating was expanded in scope in 2018 to include sawn lumber. AWC anticipates that multiple manufacturers of liquid-applied fire retardants intended for use with wood products will seek alternate materials and methods approvals for sawn lumber applications of their products. Additionally, multi-family builders may choose to use new fire retardant products on sawn lumber as a construction fire prevention measure.