CFI Building Construction Classifications 2 — Questions and Answers
Question 1: Which IBC construction type requires all structural elements to be of noncombustible materials but permits a lower fire-resistance rating than Type I?
- Type II (Correct answer)
- Type III
- Type IV
- Type V
Correct answer: Type II
Type II construction uses noncombustible materials throughout but with reduced fire-resistance ratings compared to Type I.
Question 2: In a Type III (ordinary) construction building, the interior structural members may be made of:
- Any approved material, including combustible (Correct answer)
- Only noncombustible steel
- Only reinforced concrete
- Only masonry
Correct answer: Any approved material, including combustible
Type III construction requires noncombustible exterior walls but permits interior structural members to be of any approved material, including wood.
Question 3: Heavy timber (Type IV) construction requires columns to have a minimum dimension of:
- 8 inches (Correct answer)
- 4 inches
- 6 inches
- 12 inches
Correct answer: 8 inches
IBC Type IV heavy timber construction mandates solid or laminated columns with a minimum 8-inch nominal dimension.
Question 4: A fire inspector identifies a warehouse with unprotected steel roof trusses and masonry exterior walls. This is BEST classified as:
- Type II-B (Correct answer)
- Type I-A
- Type IV-HT
- Type V-B
Correct answer: Type II-B
Unprotected noncombustible construction with masonry walls corresponds to Type II-B, the least fire-resistant noncombustible type.
Question 5: Which construction type is associated with the term 'mill construction' historically used in textile factories?
- Type IV (Correct answer)
- Type I
- Type II
- Type III
Correct answer: Type IV
Type IV (heavy timber) construction is historically called mill construction due to its widespread use in 19th-century industrial mills.
Question 6: Under the IBC, Type I-A construction requires exterior bearing walls to have a fire-resistance rating of at least:
- 3 hours (Correct answer)
- 1 hour
- 2 hours
- 4 hours
Correct answer: 3 hours
IBC Table 601 requires Type I-A exterior bearing walls to have a minimum 3-hour fire-resistance rating.
Question 7: A building's construction type classification is PRIMARILY used by the fire inspector to assess:
- Expected fire behavior and structural stability under fire (Correct answer)
- Occupancy load calculations
- Means of egress capacity
- Sprinkler head spacing requirements
Correct answer: Expected fire behavior and structural stability under fire
Construction type directly determines how a building will behave structurally during a fire, guiding fire suppression tactics and life-safety decisions.
CFI Building Construction Classifications 2
Which IBC construction type requires all structural elements to be of noncombustible materials but permits a lower fire-resistance rating than Type I?