Foundation and Footing PlansHere's a foundation-plan example for a small home plan. The floor needs a girder in the middle to help with the span of the floor joists. The girder plan is in the middle of the illustration to show how it is built. Girders are boards nailed together resting upon concrete piers that run the length of the foundation. Floor joists are attached to the girder crosswise to make the floor more secure.
This illustration shows how the cement footing is made. The cement forms can be made from boards or plywood. The rebar is then placed into the forms before the cement is poured. The footing and foundation are usually two separate pours so that the footing can dry completely.
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