Manhattan Beach Decks & Patios, Footings Checked at the House
Manhattan Beach decks and patios that start with a test pit at the house footing, so new posts stay clear of it, then rim, hardware and setback checks.
Our first dig on a Manhattan Beach deck job is a small test pit against the house foundation. It shows how deep and wide the existing footing runs, what soil it bears on and how the ground falls away from the wall. A new footing dug lower than the bottom of the house footing and close beside it can undercut it, so the pit sets how far out the first row of posts must sit.
What the pit decides
If the house footing turns out shallow, new footings near the wall are kept at or above its base, or moved out until the soil between them stays undisturbed. A ledger can then carry the inner edge of the deck while the first post line stands clear. Should the ground fall from the house, the pit also records how the grade changes over the first few feet, which feeds the post heights. Loose, sandy soil found in the pit can call for wider pads. The engineer gets photos and measurements from the pit, and the footing plan is drawn around them.
Above the pit
The house wall gets the next look. Siding is opened at the ledger line to confirm a solid rim, and the old connectors, if a deck is already there, are scraped to see how far rust has gone. Replacement hardware carries a coating rated for a coastal lot. Setbacks and height limits for the lot are read from the zoning, and the City of Manhattan Beach reviews the plans. Gas, water and power lines entering the house near the deck are marked so the first footings miss them. Patio work at grade can share the same excavation visit.
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Decks & Patios in Manhattan Beach: questions
Two limits set it near the house: the footing must reach firm bearing, and it must stay out of the zone under the existing foundation that carries the house's load. The test pit shows both, and loose soil in it can push a Manhattan Beach footing deeper or wider.
Fire hazard maps are revised from time to time, so the Manhattan Beach parcel is looked up on the current version when the deck is designed. An unmapped lot follows the ordinary deck sections of the code. Mapping would change the drawings: listed decking, plus a section showing how the underside is closed or kept clear.
The test pit can change the answer. If the first post line has to move out from the house to stay clear of its footing, beams get longer and a row of footings may be added, which costs more than height or area alone would suggest. That change is priced once the pit is open, beside the usual height and area lines.
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Tell us about the lot and the job. A builder replies by phone or email to set up a visit.