How Is Brick Veneer Anchorage Designed for High Wind Loads?

Brick veneer is anchored to its structural backup with metal ties designed for wind pressure over each tie's tributary area, spaced per TMS 402 limits and sized for the cavity width. The ties must resist tension and compression from wind, accommodate differential movement between veneer and backup, resist corrosion for the building's life, and the veneer needs flashing, weeps, and movement joints as part of the complete wall system. The mental model: the brick is a sail, the ties are the rigging, and the backup wall is the hull. The sail takes the wind; the rigging has to hold for the life of the building without anyone ever seeing it again.

Corrugated ties — the familiar wavy strips — nail or screw to stud backup and embed in the mortar joint, handling standard residential and light commercial cavities. Adjustable anchors use a two-piece system (a plate on the backup, a wire pintle engaging the veneer) that accommodates wider cavities and differential movement, standard for commercial work over CMU or concrete backup. Wire joint reinforcement with wall ties combines horizontal crack control with anchorage in some systems. Beyond the ties, the veneer system includes the support: a foundation ledge or steel shelf angle carrying the brick's weight, with the brick's height above each support limited by code. Movement joints divide the veneer into panels that can expand and contract independently — brick grows irreversibly with moisture over its life, a slow expansion the detailing must accommodate. And the drainage plane — flashing, weeps, and a clear cavity — keeps the whole assembly dry enough for the ties to survive.

Veneer anchorage is designed once and hidden forever, so the design has to be right and the installation has to be verified while the cavity is still open. Most veneer problems I see were cast the day the brick went up.

• Size ties for the actual wind pressure and tributary area — gables and corners see higher loads
• Match the tie to the cavity: rated capacity assumes the detailed cavity width
• Specify corrosion-resistant ties and fasteners for the exposure — the ties must outlast the mortgage
• Detail the full water management: flashing, weeps, and clear cavities, not just the ties
• Require inspection before the cavity closes: tie spacing and embedment can't be verified afterward