BT 1: Types of Foundation

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BT 1: Types of Foundation

  1. 1. FOUNDATION Lowest division of a building “Substructure” ( partly or wholly below the surface of the ground ) Function is to support and anchor the superstructure Should accommodate the form and layout of the superstructure above and respond to the varying conditions of the soil, rock and water below. Footing – extension of the lower part of the column to distribute load BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  2. 2. FOOTING• Extended laterally to distribute their load over an area of soil wide enough that the allowable bearing capacity of the soil is not exceeded.• Material used is concrete (reinforced or not), which should not have a compressive strength reading lower than 2500 psi. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  3. 3. FOOTING
  4. 4. TYPES OF FOOTING• Strip footings – are the continuous spread footings of foundation walls. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  5. 5. • Stepped footings – strip footings that change the levels in stages to accommodate a sloping grade and maintain the required depth in all points around a building. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  6. 6. • Cantilever/strap footings – consists of a column footing connected by a tie beam to another footing in order to balance an asymmetrically imposed load. Strap beam BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  7. 7. • Combined footings – reinforced concrete footings for a perimeter foundation wall or column extended to support an interior column load. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  8. 8. • Mat/raft foundation – heavily reinforced concrete slab that serves as a single monolithic footing for a number of columns or an entire building. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  9. 9. • Isolated footings – individual spread footings supporting freestanding columns and piers. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  10. 10. • Continuous footings – reinforced concrete footings extended to support a row of columns. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM
  11. 11. Spread footing A concrete footing extended laterally to distribute the foundation load over a wide enough area that the allowable bearing capacity of the supporting soil is not exceeded. BASIC TYPES OF FOUNDATION YOUNG, ADRIAN LAWRENCE D. BUILDING TECHNOLOGY 1 – 7-00-8-00 AM

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