5 inches, and a 2x6 measures 1. S4S lumber has been planed smooth on all four edges and faces, meaning the dimensions are precise and ready to use immediately.
Pressure Treated Lumber Sizes Available for Standard Projects
Consequently, the actual size of a standard 2x4 is 1. You will encounter two main grades: S4S (Surfaced Four Sides) and S3S (Surfaced Three Sides).
75 inches by 5. For residential framing, the 8-foot length is the undisputed standard, as it fits neatly into the typical eight-foot ceiling height minus the plate thickness.
Pressure Treated Lumber Sizes Available for Standard Construction Projects
For taller spaces or long rafters, 10-foot and 12-foot boards are widely used. Dimension Lumber (1x stock): Includes 1x2s, 1x3s, 1x4s, 1x6s, and 1x8s.
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