Week 2

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Week 2

  1. 2. 15 minute breakout 1. What are the 2 basic different types of foundations? When would we use one versus the other? 2. In each of the two types – what are the subtypes and when would you use them?
  2. 3. <ul><li>Shallow and deep foundations </li></ul><ul><li>Shallow – soil directly below walls and columns bear the weight of the building. Cheaper. Ideal for high water table and relatively light building. </li></ul><ul><li>Deep – Soil conditions directly below the building not suitable therefore structure required to reach deeper to appropriate soil conditions. </li></ul>
  3. 4. Shallow – Types. A. Slab on grade – high water table – common in BA B. Crawl Space – common for wood frame – access to utilities C. Basement – Storage and utilities
  4. 5. <ul><li>Slab on grade- assembly </li></ul><ul><li>Trench for utilities </li></ul><ul><li>Trench for footings </li></ul><ul><li>Rebar in footings </li></ul><ul><li>Pour footings </li></ul><ul><li>Waterproof membrane </li></ul><ul><li>Sand </li></ul><ul><li>Reinforcing for slab </li></ul><ul><li>Concrete slab pour </li></ul>
  5. 10. <ul><li>Footings for crawl spaces and basements. </li></ul><ul><li>spread the force of the vertical loads of columns and walls over more soil area </li></ul><ul><li>Spread footing </li></ul><ul><li>Column footing </li></ul>
  6. 11. <ul><li>Concrete footings and foundations </li></ul><ul><li>Foundations poured separately from vertical carrying structure. </li></ul><ul><li>Waterproofing issues </li></ul><ul><li>Drain the water –remove pressure on walls </li></ul><ul><li>Keep water out of the building </li></ul>
  7. 15. <ul><li>Deep foundations – Pile driving </li></ul><ul><li>Reach down to bedrock for poor soil conditions </li></ul><ul><li>Pile caps/ grade beams support columns and walls </li></ul><ul><li>Concrete slab </li></ul>
  8. 18. <ul><li>Deep foundations – </li></ul><ul><li>Mat slabs, Excavation and retaining walls </li></ul><ul><li>Mat slab – very think slab (6’) with a lot of steel reinforcing that replaces individual column footings </li></ul><ul><li>Excavation sequence </li></ul><ul><li>1. Drive soldier beams – steel into ground </li></ul><ul><li>2. Place wood lagging between beams as you excavate down to retain soil </li></ul>
  9. 24. <ul><li>Below grade foundation walls and waterproofing </li></ul><ul><li>Protection board </li></ul><ul><li>Waterproof membrane </li></ul><ul><li>Concrete retaining wall </li></ul>

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