Stud notch ≤ 25% (bearing) / 40% (non-bearing); hole ≤ 40% (bearing, single) / 60% (double or non-bearing); ⅝ in min edge
2025 RCNYS §R602.6 Drilling and notching of studsDescription
In exterior + bearing-wall studs: notches ≤ 25% of stud depth; bored holes ≤ 40% (60% if the stud is doubled, max 2 successive). In interior non-bearing partitions: notches ≤ 40%; bored holes ≤ 60%. Holes must be ≥ ⅝ in from the stud edge. Notches and holes may NOT be in the same cross-section. Top-plate notches > 50% require a 16 ga × 1½ in galvanized metal tie across the opening with 8-10d nails each side (extending ≥ 6 in past the opening).
Why this exists
Plumbers and electricians routinely over-drill studs at rough-in. The 25/40/60% limits are the structural floor for the stud's strength. Architects should call out the notching limits on the MEP coordination sheet AND specify stud shoes where conflicts force larger holes than allowed.
Measurements
| Property | Operator | Value | Unit | Note |
|---|---|---|---|---|
bearingNotchMax | max | 25 | % of stud depth | Max notch depth in bearing wall |
nonbearingNotchMax | max | 40 | % of stud depth | Max notch depth in non-bearing wall |
bearingHoleMax | max | 40 | % of stud depth | Max bored hole in bearing wall (single stud) |
nonbearingHoleMax | max | 60 | % of stud depth | Max bored hole in non-bearing wall (or doubled bearing stud) |
edgeDistance | min | 0.625 | in (5/8) | Min distance from hole edge to stud edge |
Categories
Applies to
- Jurisdiction: New York State
Source
Solver enforcement
Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.
Related directives
- Habitable space minimum ceiling height · IRC R305.1
- Wind design · IRC R301.2.1
- Seismic provisions · IRC R301.2.2
- Snow loads · IRC R301.2.3
- Floodplain construction · IRC R301.2.4
Last reviewed 2026-05-15.