Dressed Four Sides: D4S

What is D4S?

“D4S” or dressed four sides (also referred to as S4S or surfaced four sides) indicates that the materials have been dressed, or surfaced, on all four sides.

NOTE: Dressing will change the actual size of a rough cut measurement. For example, a 4 X 4 piece of lumber dressed on four sides will have an actual measurement of approximately 3.5 X 3.5.