BEFORE THE ARCHITECT – THE BIG PICTURES
RESIDENTIAL DRAWINGS – HOUSE FOUNDATION TYPES
"It's your dream home; it's their business deal." AG 2002
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House Foundation Types - Foundation Repair, in
.Pdf*
A client needed a construction plan to repair a crumbling, residential foundation. We worked from scratch on this one, knowing only dimensions and general areas of deterioration. The catch — the foundation is beneath a house in super-seismic San Jose, CA. Here's the sheet that'll get him the permit, and at the same time, make the construction process itself as clear as can be. This is about mating construction durability and homeowner safety (the homeowner is to be his own general contractor) in an unusual application.
Foundation failures are not uncommon in early 1940s constructions such as this, wherein civilian wartime mixes were short on concrete and foundation structure was short on steel reinforcements. The California site may have contributed, too.
Highlights include:
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Please note the extraordinarily detailed notes. These notes are intended to make certain that the homeowner-contractor knows exactly the hows, whats, and what-withs of the remediation project. |
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Also, please note the specifics involved in the specs for crawl space ventilation. |
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Seismic considerations come to play in several aspects, most notably in the refrain from driven or expansion intrusions in the softer, existing by drilling and dowels and in the application of a concrete mix of a lower than usual compression rating. |
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The drawing in perspective is unique. |
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House Foundation Types -Spread Footing and
Pier, in .Pdf.*
Such house foundation types are reasonably straightforward - square footing twice as wide and thick with rebar reinforcement squared near its bottom of face, and a concrete pier reinforced at least to counter shear. Such footings and piers were applied, in this instance, to a one-story addition at L2.
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House Foundation Types - Continuous
Concrete Stem Wall and Footing,
or Strip Foundation - In Perspective, in .Pdf.*
This one among house foundation types is might sturdy, but can get time-consuming in its interim periods between placements of different elements and a little pricier in its need in our opinion to be sealed from moisture intrusion at cold joints.
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House Foundation Types - Block Wall
over Strip Footing, Detail
While this pic is in its entirety a wall section, please note that Before The Architect details foundation elements, too, including extensive cross-references to both foundation plan drawings and foundation specifications.
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