Chapter 7 Foundation Systems

Foundations – Purpose – Transfer loads of various types to the earth Foundations – Purpose – Transfer loads of various types to the earth. Basic requirements: - Safe against structural failure - Settle uniformly - Economically and technically feasible

Types – 2 Basic Categories A). Deep – Piles, caissons, mat floating – Types – 2 Basic Categories A) Deep – Piles, caissons, mat floating – (1) Used for tall buildings, bridges or for structures on incompetent soil B) Shallow – Spread or column footings, continuous footings, slabs on grade, low rise buildings, for structures on competent soil

Foundation Drawings A) Mostly orthographic drawings B) Lines, symbols

Plans A). Plan view with hidden lines for below ground B) Plans A) Plan view with hidden lines for below ground B) Details – Split bubble system

Other Considerations A). Inspections – Driven by agencies and. type of Other Considerations A) Inspections – Driven by agencies and type of project B) Installation of reinforcing steel C) Concrete – Placing, consolidating and curing D) Back Filling – Horizontal back pressure E) Errors and Omissions F) Takeoff – Labor, equipment, time, material