Project Overview & Background
This Seal Beach deck failed inspection on an existing cable railing, and the homeowners were surprised because the cables were correctly spaced. Spacing is only half the requirement.
Cable infill must also resist deflection — a 4-inch sphere must not pass through under a specified load, not merely at rest. The original installation used cable at the right spacing but under insufficient tension and with posts too far apart, so pushing on the cables opened the gaps well beyond the limit. We rebuilt it with intermediate posts, correct tensioning, and cable routed through the intermediate posts rather than past them, which is what actually controls deflection between bays.
Structural Challenge:
Retrofitting intermediate posts into an existing deck without visible patching. Post bases were set on the existing joist lines, which dictated bay widths — not ideal spacing aesthetically, but it avoided cutting new blocking into a finished deck.
Engineered Solution:
Added intermediate posts on existing joist lines, re-tensioned to specification, and routed cable through rather than past intermediate posts.
The first company told us it met code. It did not. This time it actually passed.
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