IBC Risk Management & Mitigation 2 — Questions and Answers
Question 1: Under IBC Chapter 16, which Risk Category applies to buildings that pose a substantial hazard to human life in the event of failure, such as elementary schools with an occupant load exceeding 250?
- Risk Category I
- Risk Category II
- Risk Category III (Correct answer)
- Risk Category IV
Correct answer: Risk Category III
IBC Table 1604.5 assigns Risk Category III to buildings whose failure would pose a substantial hazard to human life, including schools with occupant loads over 250.
Question 2: Which IBC provision requires buildings to be designed to resist progressive collapse by providing minimum levels of structural integrity?
- Section 1604.2 (Correct answer)
- Section 1613.1
- Section 1615.1
- Section 1620.3
Correct answer: Section 1604.2
IBC Section 1604.2 requires that structural systems provide general structural integrity to resist progressive collapse.
Question 3: A building located in a flood hazard area must comply with IBC Section 1612. What is the primary reference standard adopted by IBC for flood-resistant construction?
- ASCE 24 (Correct answer)
- ASCE 7
- FEMA 550
- NFPA 13
Correct answer: ASCE 24
IBC Section 1612 references ASCE 24 (Flood Resistant Design and Construction) as the standard for flood hazard areas.
Question 4: When assessing wind risk, the IBC uses Exposure Categories to account for surface roughness. Which Exposure Category describes open terrain with scattered obstructions having heights generally less than 30 feet?
- Exposure A
- Exposure B
- Exposure C (Correct answer)
- Exposure D
Correct answer: Exposure C
Exposure Category C per ASCE 7 (adopted by IBC) describes open terrain with scattered obstructions under 30 feet in height.
Question 5: IBC Section 1803 requires geotechnical investigations under certain conditions. Which condition typically triggers a mandatory soils investigation for risk mitigation?
- Any single-family dwelling on a flat lot
- Construction on fill that is more than 12 inches deep in any location (Correct answer)
- Any building over 3,000 sq ft
- All new construction regardless of site conditions
Correct answer: Construction on fill that is more than 12 inches deep in any location
IBC Section 1803.5.1 requires investigation when buildings are proposed on fill material that is more than 12 inches deep.
Question 6: For seismic risk mitigation, the IBC defines Seismic Design Categories (SDC) A through F. Which SDC represents the highest level of seismic hazard and requires the most stringent design requirements?
- SDC B
- SDC C
- SDC D
- SDC F (Correct answer)
Correct answer: SDC F
Seismic Design Category F (per IBC Section 1613 and ASCE 7) represents the highest seismic hazard and applies to Risk Category IV buildings in areas of highest ground motion.
Question 7: Under IBC Chapter 9, which fire protection system is specifically designed to mitigate risk by detecting and suppressing fires automatically in their early stages?
- Standpipe system
- Fire alarm system
- Automatic sprinkler system (Correct answer)
- Smoke control system
Correct answer: Automatic sprinkler system
Automatic sprinkler systems (referenced in IBC Chapter 9 and NFPA 13) both detect and suppress fires automatically, providing active risk mitigation.
IBC Risk Management & Mitigation 2
Under IBC Chapter 16, which Risk Category applies to buildings that pose a substantial hazard to human life in the event of failure, such as elementary schools with an occupant load exceeding 250?