Florida General Contractor Florida General Contractor Soils and Foundation Systems

Question 1

Which material typically has the highest allowable bearing capacity for foundation design?

Accepted Answer

Bedrock

Answer

Bedrock has the highest bearing capacity of any material, often exceeding 10,000 psf, making it the most suitable for heavy foundation loads.

Question 2

What is the standard unit used to express soil bearing capacity in the United States?

Accepted Answer

Pounds per square foot (psf)

Answer

Soil bearing capacity is expressed in pounds per square foot (psf) or tons per square foot (tsf) because it measures load distributed over an area.

Question 3

Why are Florida building footings NOT required to be placed at a minimum frost-protection depth?

Accepted Answer

Florida's climate does not produce freezing ground temperatures

Answer

Florida has no frost line because ground temperatures do not drop low enough to freeze soil, so frost depth requirements that apply in northern states are not applicable.

Question 4

Which field test is most commonly used to verify the in-place density of compacted fill during construction?

Accepted Answer

Nuclear density gauge test

Answer

The nuclear density gauge test measures in-place moisture and density of compacted fill quickly and non-destructively, making it the standard QC tool on job sites.

Question 5

What is the primary reason geotechnical soil borings are performed before a construction project?

Accepted Answer

To determine soil layers, bearing capacity, and groundwater conditions for foundation design

Answer

Soil borings provide engineers with data on soil stratification, bearing capacity, and groundwater depth, which are essential for designing an appropriate and safe foundation system.

Florida General Contractor Practice Test

Florida General Contractor Practice Test

Florida General Contractor Florida General Contractor Soils and Foundation Systems