Retrofit mechanical veneer anchors to replace corroded or missing masonry wall ties
domain: icc-es.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Confirm veneer tie failure or corrosion (bulging, cracking, displaced brick, or invasive-probe findings) before selecting a retrofit tie system, since retrofit anchors address missing/corroded ties specifically.
Have an engineer of record determine the required tie density and spacing based on current wind/seismic load requirements for the wall, rather than simply matching the original (often deficient) tie count.
Select a mechanical retrofit tie system (helical screw-in tie or expansion-anchor tie) with current code-recognition documentation suited to the backup wall material (steel stud, wood, CMU, concrete).
Install per the manufacturer's published embedment depth, torque, and spacing requirements, verifying engagement in the backup wall on a sample basis.
Patch and point the small install holes to match the surrounding mortar and inspect for any incidental veneer displacement caused by drilling.
Known gotchas
Retrofit tie systems are proprietary and code-recognized via evaluation reports rather than a single prescriptive retrofit standard -- verify the specific product's current documentation rather than treating all systems as interchangeable.
Engagement in a deteriorated or hollow backup wall (rotted sheathing, degraded CMU face shell) can defeat an anchor even when installed per spec -- probe backup condition first.
Retrofit tie density sized for current code loads is often higher than the original tie count -- don't replace failed ties on a strict 1-for-1 basis.
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