The maximum allowable notching of a nominal 2"x10" wood stud on an exterior wall is ____________ inches.

The maximum allowable notching of a nominal 2"x10" wood stud on an exterior wall is 1 3/8 inches. This is based on the structural integrity guidelines set forth by various building codes and standards for wood framing.

When notching wood studs, it is crucial to adhere to these guidelines to maintain the strength and load-bearing capabilities of the framing members. The specified depth of 1 3/8 inches ensures that a sufficient amount of wood remains intact to support any loads the wall may bear, such as roofing or upper wall structures.

Notching that exceeds this limit could compromise the stud's ability to effectively uphold its structural functions, leading to potential weaknesses or failure in the wall assembly. Proper adherence to these specifications ensures safety and longevity in building construction, particularly in load-bearing walls where external forces are acted upon.

Therefore, selecting 1 3/8 inches as the maximum allowable notching aligns with industry practices aimed at ensuring the stability and reliability of wood-framed structures.