Activity 3.2.8 - Foundation Types
[pic]
|Activity 3.2.8 Foundation Types and Considerations |
Introduction
Someone once said, “It is not the beauty of a building you should look at; it is the construction of the foundation that will stand the test of time.” Although a building is architecturally beautiful and structurally sound, if the foundation cannot safely support it, the building is doomed to failure. An engineer takes many factors into consideration when designing a foundation system. The type of foundation specified for a building depends on the loading, the size and shape of the building, environmental conditions, the soil conditions, and the cost of construction. In this activity you will learn about many different types of foundations and when each is used. You will also investigate soil and environmental conditions for a site to provide information necessary to the design of a foundation.
Equipment
Paper
Pencil
Procedure
Research the following foundation types and draw sketches of each one. Describe the conditions under which each might be used.
|Typical Foundation |Diagram/Sketch |
|Systems/Usage | |
| |[pic] |
|Continuous (Strip) Footing with| |
|Stem Wall | |
| | |
|Usage: Light frame | |
|construction Under foundation | |
|walls | |
| |[pic] |
|Spread Footing with Pier | |
| | |
| | |
|Usage: Usually used in low-rise| |
|buildings | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
|Slab-on-Grade with Thickened | |
|Slab | |
| | |
|Usage: Residential or light | |
|commercial construction, | |
|Shallow frost depth or when | |
|frost protection is used | |
| | |
|Mat (Floating) Foundation | |
| | |
| | |
|Usage: Heavy loads on weak | |
|soil | |
| | |
| |[pic] |
|Pile and Pile Cap | |
| | |
| | |
|Usage: Weak shallow soil with | |
|deep satisfactory soils | |
| |[pic] |
|Cast-in-Situ Pile and Grade | |
|Beam | |
| | |
| | |
|Usage: Weak shallow soil with | |
|satisfactory soils at | |
|intermediate depth | |
Visit the FEMA Map Service Center at . Create a FIRMETTE for the Keystone Library Renovation site (Choose FIRMette under What are you looking for?). Then answer the following questions.
Is the Keystone Library Renovation site in an A Zone or V Zone?
[pic]
How does this affect the building design?
Conclusion
1. How do weight and applications of loads affect the design of a structure?
You have to design the structure to support the weights and loads that the structure will have to support so then the structure will not collapse on itself.
What factors determine whether soil is suitable to support a structure?
Soil bearing pressure, frost depth, flood elevation, and drainage
What considerations influence the depth and height of the foundation?
Frost depth and flood elevation
4. What are the typical modes of failure of a concrete footing?
Bending failure, shear failure, and Punch Throughs.[pic]
-----------------------
THICKENED SLAB
WALL
SLAB-ON-GRADE
MAT FOUNDATION
CONCRETE PIER
................
................
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