CDS Building Codes & Standards 2 — Questions and Answers
Question 1: Under IBC Chapter 33, what is the minimum height requirement for a debris chute opening at the point of loading to prevent worker injury?
- 4 feet above the working surface (Correct answer)
- 6 feet above the working surface
- 8 feet above the working surface
- 10 feet above the working surface
Correct answer: 4 feet above the working surface
IBC Chapter 33 requires debris chute openings to be at least 4 feet above the working surface to reduce fall risk.
Question 2: Which ANSI/ASSE standard specifically addresses fall protection requirements for demolition contractors?
- ANSI A10.6 (Correct answer)
- ANSI A10.1
- ANSI Z359.1
- ANSI A10.22
Correct answer: ANSI A10.6
ANSI A10.6 is the safety standard for demolition operations and covers fall protection requirements specific to demolition contractors.
Question 3: According to NFPA 241, a fire watch must be maintained for how long after hot work is completed in a demolition zone?
- 30 minutes
- 1 hour (Correct answer)
- 2 hours
- 4 hours
Correct answer: 1 hour
NFPA 241 requires a minimum 1-hour fire watch after hot work to detect smoldering fires that may ignite delayed combustion.
Question 4: When demolishing a load-bearing masonry wall, OSHA 29 CFR 1926.854 requires that floors be shored if the span exceeds what dimension?
- 10 feet
- 15 feet (Correct answer)
- 20 feet
- 25 feet
Correct answer: 15 feet
OSHA 1926.854 requires floor shoring when unsupported span exceeds 15 feet during masonry wall removal to prevent progressive collapse.
Question 5: The IBC defines a 'dangerous building' for demolition purposes primarily based on which criterion?
- Age of the structure exceeds 50 years
- Structural elements unable to support intended loads (Correct answer)
- Presence of lead paint or asbestos
- Vacancy period exceeding 12 months
Correct answer: Structural elements unable to support intended loads
IBC classifies a building as dangerous when its structural members can no longer safely support the loads they were designed to carry.
Question 6: Which building code section governs the demolition of structures adjacent to public rights-of-way and requires protective sidewalk sheds?
- IBC Section 3306 (Correct answer)
- IBC Section 3301
- IBC Section 3309
- IBC Section 3304
Correct answer: IBC Section 3306
IBC Section 3306 specifically addresses protection of pedestrians in public rights-of-way and mandates sidewalk shed requirements.
Question 7: Under ASTM E2026, the seismic hazard level that triggers mandatory pre-demolition structural assessment is categorized as:
- Seismic Design Category A
- Seismic Design Category B
- Seismic Design Category C
- Seismic Design Category D or higher (Correct answer)
Correct answer: Seismic Design Category D or higher
ASTM E2026 guidelines require enhanced pre-demolition assessment when a site falls in Seismic Design Category D or higher due to elevated ground motion risks.
CDS Building Codes & Standards 2
Under IBC Chapter 33, what is the minimum height requirement for a debris chute opening at the point of loading to prevent worker injury?