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Common studs - Holes and bracing

Holes in studs must be located within the middle half of the depth of the member and holes in plates must be located within the middle half of the breadth of the member. AS 1684.2-2006 provides a table with all the details set out similar to the following example:

Symbol Description Limits
Notched Not notched
A Distance between holes and/or notches in stud breadth Min 3D Min 3D
Table 1: Hole distance in studs

Where studs have to be braced, the bracing is notched into the stud as shown in the diagram below.

Diagram from the Timber Promotion Council's Timber Framing Manual (revised February 1994) showing studs and a bottom plate of a frame. Notches in the studs to hold the bracing are minimum 12 W apart (where W is stud width).