Brick / masonry tie calculator
How many wall ties a brick-veneer wall needs, at the code spacing — one tie per 2.67 sq ft of field, plus extra ties around every opening and free edge.
Ask Leeter AI ↓How this is calculated
- 1Rule
Under IRC 2021 R703.8.4.1, one corrugated sheet-metal veneer tie supports no more than 2.67 sq ft of wall, spaced ≤32 in horizontally and ≤24 in vertically. Field ties = ceil(net area ÷ 2.67), where net area = length × height − openings.
- 2Openings & edges
Extra ties are required within 12 in of openings (larger than 16 in in either dimension) and along free edges, at ≤3 ft on-centre: edge ties = ceil(perimeter ÷ 3 ft). Total = field + edge ties, always rounded up.
- 3Worked example
A 20 × 9 ft wall = 180 sq ft with one 3×5 ft window (15 sq ft) → net 165 sq ft → 165/2.67 = 61.8 → 62 field ties; window perimeter = 16 ft → 16/3 = 5.3 → 6 edge ties; total 68 ties.
- 4Scope
Corrugated ties are valid only over wood- or steel-stud framing with a ≤1 in air space; wider cavities or masonry/concrete backing require adjustable two-piece anchors (different rules). Because ties land on studs at 16 or 24 in centres, 2.67 sq ft is a quantity estimate, not the as-built layout.
- 5Limits
Tie count and spacing here are a planning estimate. TMS 402 allows 3.5 sq ft for some stiffer wire-tie systems, and high-wind (>130 mph) or seismic categories require tighter, engineered spacing — confirm the governing code (IRC / TMS 402 / BIA Tech Note 44B).
Leeter provides the tool, not a warranty of the result. Every figure above is a planning estimate for reference only — confirm structural, code and customs decisions with your engineer, inspector or broker.
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