Structural · S-CDHHG

Typical Wood Framing Hole and Notch Limits

Materials

Elements

Beams Walls Bearing Walls Partitions Ceilings Connections / Plates

About this detail

These typical wood framing details illustrate allowable hole and notch sizes, spacings, and placement for solid sawn lumber and manufactured wood members. Holes in joists are restricted to a maximum depth of d/3 typically, with strict clearance requirements near supports and end bearings, and no notches permitted at the bottom face except at end bearing points and cantilevered ends. Stud framing callouts outline limits for bored holes and notches in non-bearing and bearing walls, including requirements for strap reinforcement when top plate hole diameters exceed W/4. Manufactured lumber must strictly follow manufacturer literature for allowable modifications.

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