Tempo:
Plumbing, Electrical and Appliances
The space between the framing members in wood-frame walls, floors and roofs provides convenient space for locating heating, plumbing and electrical services.
CUTTING FRAMING MEMBERS
Where pipes or wires must be run at right angles to the framing, wood members may be notched or drilled within strict limitations without adversely affecting the structural strength of an assembly.
Notches made on the upper side of lumber joists near their ends (Figure 148) must be located within one-half the joist depth from the edge of the bearing and their depth cannot be more than one-third of the joist depth. Notches are
Notching of Lumber Roof, Ceiling or Floor Joists
148 Example of notch limitations joist size increased by depth of notch
effective depth of joist
notch located away from support maximum 1⁄3 of joist depth notch located with 1⁄2 of joist depth of support
Note: never notch the underside of a joist
The space between the framing members in wood-frame walls, floors and roofs provides convenient space for locating heating, plumbing and electrical services.
CUTTING FRAMING MEMBERS
Where pipes or wires must be run at right angles to the framing, wood members may be notched or drilled within strict limitations without adversely affecting the structural strength of an assembly.
Notches made on the upper side of lumber joists near their ends (Figure 148) must be located within one-half the joist depth from the edge of the bearing and their depth cannot be more than one-third of the joist depth. Notches are
Notching of Lumber Roof, Ceiling or Floor Joists
148 Example of notch limitations joist size increased by depth of notch
effective depth of joist
notch located away from support maximum 1⁄3 of joist depth notch located with 1⁄2 of joist depth of support
Note: never notch the underside of a joist
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