Cutting The Framing Members

Notching of Roof, Ceiling or Floor Joists. Notches made in the top at the end of the joists should be within one-half the joist depth from the edge of the bearing. The depth of the notch should be no more than one-third of the joist depth (Fig. 100B).

If notches are necessary elsewhere in the span (Fig. 100A), this should be

Example of notch limitations: (A) notch located away from support; (B) when applied to an 8 in. (184 mm) joist the depth of the notch at the support would be 2 3/8 in.(61 mm) maximum and the length of the notch would not extend more than 3 5/8 in. (92 mm) from the joist support.

Example of notch limitations: (A) notch located away from support; (B) when applied to an 8 in. (184 mm) joist the depth of the notch at the support would be 2 3/8 in.(61 mm) maximum and the length of the notch would not extend more than 3 5/8 in. (92 mm) from the joist support.

joist size increased by depth of notch effective depth of joist

maximum >/3 of joist depth maximum !/2 of joist depth never notch the underside of a joist joist size increased by depth of notch effective depth of joist

maximum >/3 of joist depth maximum !/2 of joist depth never notch the underside of a joist

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