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2024 International Building Code (IBC)
Chapter 18 Soils And Foundations

Quiz: 2024 International Building Code (IBC) Chapter 18 Soils And Foundations

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1. According to Section 1802.1, which load combinations must be used with the allowable bearing pressures provided in Chapter 18?

ASCE 7, Section 2.3
ASCE 7, Section 2.4 or Section 1605.2
Only Section 1605.1
Strength design load combinations only

2. Under what condition may a building official waive the requirement for a geotechnical investigation?

For any building under 2,000 square feet
When the soil is assumed to be Class 5
Where satisfactory data from adjacent areas is available
If the structure is a Group R-3 occupancy

3. In the classification of soil materials for a geotechnical investigation, which ASTM standard must be used?

ASTM D1557
ASTM D2487
ASTM D422
ASTM C90

4. A soil is considered expansive if it has a plasticity index (PI) of:

10 or greater
15 or greater
20 or greater
25 or greater

5. An investigation of groundwater conditions is required if the floor is below ground level and the groundwater is within how many feet below the lowest floor elevation?

2 feet
3 feet
5 feet
10 feet

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