Transcription of CHAPTER 5 - FOUNDATION REQUIREMENTS
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CHAPTER 5 - FOUNDATION REQUIREMENTS
CHAPTER 5 - FOUNDATION REQUIREMENTS 500. GENERAL. This section outlines general material and quality standards for all foundations in this manual. 501. EXCAVATION 501-1. FOOTING DEPTH. Excavation for footings or FOUNDATION walls shall extend below depth of soil subjected to seasonal or character-istic volume change to undisturbed soil that provides adequate bearing. Select the greatest depth required by any of the provisions below, reference Figure 5-1. A. Maximum Frost Penetration Depth. The bottom of footings shall extend at least to the depth indicated on the map on page H-4. B. Alternate Seasonal Wetting and Drying. This is especially important with ex-pansive soils. If expansive soils exist, consult a geotechnical engineer to obtain required foot-ing depth. C. Footing Depth. The footings shall be deep enough to provide required uplift capac-ity. (This value may need to be determined for high wind areas after the calculations needed to determine footing bearing have been com-pleted.)
503-1. FOUNDATION REQUIREMENTS. All exterior walls, marriage walls, marriage wall posts, columns and piers, must be sup-ported on an acceptable foundation system that must be of sufficient design to support safely the loads imposed, as determined from the character of the soil. A. Height Above Grade. Foundation
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