Foundation Plan

Information Required
  • Attach a Soils Engineering Report by a licensed Geotechnical Engineer to the approved plans when foundation is to be constructed on disturbed (fill) material.
  • Provide a north arrow that matches the building orientation on the site plan.
  • Be certain that (properly sized) piers are located under concentrated loads such as posts or trimmers supporting load bearing members such as beams or girder trusses. If the posts are located at an exterior footing, the footing should be widened to the same dimension as the required pier. Note: the omission of piers is the most common structural error found on plans and during framing inspections, and is a serious oversight.
  • If there are hold-downs (seismic anchors), provide a hold-down schedule on foundation plan.
  • Note on plan that all hold-downs are to be fastened in place prior to foundation inspection.
  • For building sites steeper than a 1:10 slope (10%), provide a stepped footing detail (cross section).
  • Show all foundation elements in plan view, including interior footings and piers, if applicable.
  • Provide a cross-section showing typical footing/stem wall or footing/slab dimensions, including placement and size of reinforcement.
  • Specify foundation bolt size and spacing.
  • Indicate height and location of retaining walls. Note that walls exceeding 48 inches from the bottom of the footing to the top of the wall must be engineered, and designed or approved by the Engineer or Architect of Record, if applicable.
  • For slab-on-grade construction, show type of slab reinforcement. Also show vapor barrier if it is a habitable area. Be sure that the reinforcement type installed matches the plan engineering (a common error).