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2024 International Building Code
Chapter 18: Soils And Foundations

Quiz: 2024 International Building Code Chapter 18: Soils And Foundations

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1. Which of the following load combinations shall be used with the allowable stress design for building and foundation systems, as specified in IBC Chapter 18?

Strength design load combinations specified in ASCE 7, Section 2.3
Allowable stress design load combinations specified in ASCE 7, Section 2.4 or alternative 1605.2
Ultimate strength design load combinations specified in ASCE 7, Section 2.5
Serviceability load combinations specified in ASCE 7, Section 2.2

2. Under what condition is the building official permitted to waive the requirement for a geotechnical investigation?

When the structure is a one-story residential building.
When the construction schedule does not allow for a full investigation.
When satisfactory data from adjacent areas demonstrates an investigation is not necessary for conditions in 1803.5.1 through 1803.5.6, 1803.5.10 and 1803.5.11.
When the estimated construction cost is below a certain threshold.

3. According to IBC, soil materials shall be classified in accordance with which ASTM standard?

ASTM D1557
ASTM D4318
ASTM D2487
ASTM D6913

4. Which of the following is NOT one of the four provisions that, if all met, cause a soil to be considered expansive, unless an expansion index test is conducted?

Plasticity index (PI) of 15 or greater.
More than 10 percent of the soil particles pass a No.200 sieve (75 µm).
More than 10 percent of the soil particles are less than 5 micrometers in size.
Moisture content of 20 percent or greater.

5. A geotechnical investigation is required to determine if groundwater is above or within what distance below the elevation of the lowest floor level, where such floor is located below the finished ground level adjacent to the foundation?

2 feet (610 mm)
3 feet (914 mm)
5 feet (1524 mm)
10 feet (3048 mm)

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