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ICC 93 Tall Mass Timber Buildings Exam QUESTIONS
AND VERIFIED ANSWERS WITH RATIONALES JUST
RELEASED
ICC 93 Tall Mass Timber Buildings Exam - Practice Questions
Question 1
The 2021 IBC introduced three new construction types to accommodate tall mass timber buildings.
What are these three new classifications?
A) Type III-A, III-B, and III-C
B) Type IV-A, IV-B, and IV-C
C) Type V-A, V-B, and V-C
D) Type II-A, II-B, and II-C
Correct Answer: B
Rationale: The 2021 IBC added Type IV-A, IV-B, and IV-C as new mass timber construction classifications,
alongside the existing Type IV-HT (Heavy Timber).
Question 2
Under the 2021 IBC, which Type IV classification permits the greatest building height for mass timber
structures?
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A) Type IV-HT (Heavy Timber)
B) Type IV-A
C) Type IV-B
D) Type IV-C
Correct Answer: B
Rationale: Type IV-A permits the highest building height, allowing structures up to 270 feet
(approximately 18 stories). Type IV-B allows 180 feet (12 stories), and Type IV-C and Type IV-HT allow 85
feet (up to 9 stories for IV-C, 6 stories depending on specific limits).
Question 3
A developer wants to build a 12-story office building (Group B occupancy) using mass timber. Which
construction type is most appropriate under the 2021 IBC?
A) Type IV-C
B) Type IV-B
C) Type IV-A
D) Type IV-HT (Heavy Timber)
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Correct Answer: C
Rationale: Type IV-A permits up to 18 stories for Group B occupancies, while Type IV-B and IV-C have
lower height limits. Type IV-HT is not permitted for 12-story buildings.
Question 4
Which IBC chapter provides the tables and footnotes governing allowable heights and areas for Type IV
mass timber construction?
A) Chapter 5 (Allowable Heights and Areas)
B) Chapter 6 (Types of Construction)
C) Chapter 7 (Fire and Smoke Protection Features)
D) Chapter 16 (Structural Design)
Correct Answer: A
Rationale: IBC Chapter 5 establishes the allowable heights and areas for all construction types, including
the new Type IV mass timber classifications.
Question 5
The ICC 93 exam requires candidates to have which prerequisite certification before testing for the Tall
Mass Timber Buildings Special Inspector certification?
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A) Certified Building Official
B) Fire Inspector I
C) ICC Special Inspector (General) certification
D) Plan Review certification
Correct Answer: C
Rationale: The ICC Special Inspector (General) certification is a prerequisite for the Tall Mass Timber
(TMT) Special Inspector certification.
Question 6
What is a key characteristic of Cross-Laminated Timber (CLT) that distinguishes it from Glulam?
A) Glulam has cross-oriented layers, while CLT has parallel layers
B) CLT has cross-oriented layers, while Glulam has parallel layers
C) Glulam is always thicker than CLT
D) CLT cannot be used for beams or columns
Correct Answer: B
Rationale: CLT is defined by its cross-oriented layers, which provide panel stability, while Glulam's
parallel grain orientation makes it ideal for beams and columns where primary stresses are along one
direction.
ICC 93 Tall Mass Timber Buildings Exam QUESTIONS
AND VERIFIED ANSWERS WITH RATIONALES JUST
RELEASED
ICC 93 Tall Mass Timber Buildings Exam - Practice Questions
Question 1
The 2021 IBC introduced three new construction types to accommodate tall mass timber buildings.
What are these three new classifications?
A) Type III-A, III-B, and III-C
B) Type IV-A, IV-B, and IV-C
C) Type V-A, V-B, and V-C
D) Type II-A, II-B, and II-C
Correct Answer: B
Rationale: The 2021 IBC added Type IV-A, IV-B, and IV-C as new mass timber construction classifications,
alongside the existing Type IV-HT (Heavy Timber).
Question 2
Under the 2021 IBC, which Type IV classification permits the greatest building height for mass timber
structures?
, Page 2 of 144
A) Type IV-HT (Heavy Timber)
B) Type IV-A
C) Type IV-B
D) Type IV-C
Correct Answer: B
Rationale: Type IV-A permits the highest building height, allowing structures up to 270 feet
(approximately 18 stories). Type IV-B allows 180 feet (12 stories), and Type IV-C and Type IV-HT allow 85
feet (up to 9 stories for IV-C, 6 stories depending on specific limits).
Question 3
A developer wants to build a 12-story office building (Group B occupancy) using mass timber. Which
construction type is most appropriate under the 2021 IBC?
A) Type IV-C
B) Type IV-B
C) Type IV-A
D) Type IV-HT (Heavy Timber)
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Correct Answer: C
Rationale: Type IV-A permits up to 18 stories for Group B occupancies, while Type IV-B and IV-C have
lower height limits. Type IV-HT is not permitted for 12-story buildings.
Question 4
Which IBC chapter provides the tables and footnotes governing allowable heights and areas for Type IV
mass timber construction?
A) Chapter 5 (Allowable Heights and Areas)
B) Chapter 6 (Types of Construction)
C) Chapter 7 (Fire and Smoke Protection Features)
D) Chapter 16 (Structural Design)
Correct Answer: A
Rationale: IBC Chapter 5 establishes the allowable heights and areas for all construction types, including
the new Type IV mass timber classifications.
Question 5
The ICC 93 exam requires candidates to have which prerequisite certification before testing for the Tall
Mass Timber Buildings Special Inspector certification?
, Page 4 of 144
A) Certified Building Official
B) Fire Inspector I
C) ICC Special Inspector (General) certification
D) Plan Review certification
Correct Answer: C
Rationale: The ICC Special Inspector (General) certification is a prerequisite for the Tall Mass Timber
(TMT) Special Inspector certification.
Question 6
What is a key characteristic of Cross-Laminated Timber (CLT) that distinguishes it from Glulam?
A) Glulam has cross-oriented layers, while CLT has parallel layers
B) CLT has cross-oriented layers, while Glulam has parallel layers
C) Glulam is always thicker than CLT
D) CLT cannot be used for beams or columns
Correct Answer: B
Rationale: CLT is defined by its cross-oriented layers, which provide panel stability, while Glulam's
parallel grain orientation makes it ideal for beams and columns where primary stresses are along one
direction.
