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Building Foundations

Building Foundations. Locating the House on the Building Site. Plot plan Local building & zoning codes Other Factors: placement of utilities views increased privacy avoiding certain features maximizing solar heat. Basic Site Layout. Two basic methods: Existing reference line

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Building Foundations

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  1. Building Foundations Locating the House on the Building Site

  2. Plot plan Local building & zoning codes Other Factors: placement of utilities views increased privacy avoiding certain features maximizing solar heat Basic Site Layout

  3. Two basic methods: Existing reference line Surveying instrument (level or transit) GPS Technology Laser instruments Basic Layout Methods

  4. Levels Three types Builder’s level or dumpy level Automatic level Laser level Transits Theodolite Types of Instruments

  5. Outer dimensions staked out Grade Establishing Lines and Grades

  6. Locate & mark outline of building 3-4-5 method Batter Boards

  7. Finished grade – 7’4” high - 8’ walls common Top at or above minimum code. Crawl spaces Soil covers Minimum 18” Drainage Foundation Wall Height

  8. Subsoil conditions Check for rock ledge high water table any previous excavation Earth-moving equipment Wide enough to work The Excavation

  9. Review • Name and briefly describe the three basic types of levels. • What is a plot plan? • What is a batter board and what is its purpose? • Why is the excavation for a basement somewhat larger than the outside dimensions of the foundation wall?

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