Six species of the true firs in North America and two varieties of these species are generally referred to as white fir in the lumber trade. Their wood is light in weight, and is manufactured primarily into lumber, pulpwood, and plywood for construction and industrial use. Construction uses include framing, sheathing, concrete forms, roof decking, trim, and millwork. Industrial uses include box and casket shook, pallet stock, dunnage, and laminated wood products.