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| Section | Objectives |
|---|---|
| Topic 1: Tall Mass Timber Building Code Provisions | - Structural and Connection Requirements
- Fire Safety and Fire Resistance
|
>> Trustworthy International Code Council 93-Tall-Mass-Timber-Buildings Exam Content <<
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NEW QUESTION # 55
Mass timber is allowed in which of the following International Building Code Construction Types?
Answer: C
Explanation:
Mass timber can be incorporated into all five principal IBC construction types, although the extent and permitted application vary substantially. Therefore, option D is the technically complete answer.
Types III, IV and V provide the broadest opportunities for mass timber structural systems. Type III permits combustible interior building elements, Type IV is specifically organized around mass timber or noncombustible structural elements, and Type V permits structural elements of any material allowed by the code. Type IV includes the tall mass timber classifications IV-A, IV-B and IV-C, together with Type IV-HT.
Types I and II are predominantly noncombustible construction, but they are not absolute prohibitions against every wood or mass timber application. IBC Section 603 identifies permitted combustible materials in Types I and II. In addition, Table 601, Note c, permits heavy timber complying with Section 2304.11 for roof construction-including applicable primary structural frame members-where the required fire-resistance rating is one hour or less.
Consequently, the answer does not mean that a Type I or Type II building may be framed entirely with exposed mass timber. It means that code-compliant mass timber elements can be used in defined applications within each construction type.
References/Topics: 2021 IBC Sections 602.1-602.5 and 603.1; Table 601, Note c; Section 2304.11.
NEW QUESTION # 56
The building owner shall be responsible for each of the following for fire safety during construction except:
Answer: A
Explanation:
Option C is not an IFC requirement. The 2021 IFC requires inspection records to be maintained on-site, but it does not require those records to be secured in a fire- and water-resistant safe.
Section 3303.2 requires the owner to designate a site safety director. Section 3303.3 then makes that director responsible for completing a daily fire safety inspection of the project site. Every day, building and outdoor construction areas must be evaluated against the prescribed fire-safety inspection items.
The results of each inspection must be documented and retained on-site until a certificate of occupancy has been issued . The records must also be immediately available at the site for presentation to the fire code official upon request. Options A, B, and D therefore accurately reflect the code requirements.
The daily inspection program covers practical hazards such as hot work, temporary heating, combustible debris, temporary electrical wiring, hazardous-material storage, fire apparatus access, hydrants, fire department connections, standpipe availability, and portable extinguishers.
For tall mass timber projects, this documentation is particularly important because substantial combustible construction may be present before permanent fire protection systems are complete.
References/Topics: 2021 IFC Sections 3303.2 and 3303.3; site safety director; daily fire-safety inspection and documentation.
NEW QUESTION # 57
The maximum allowable height for a Group I-4 building of Type IV-B construction provided with an automatic sprinkler system in accordance with Section 903.3.1.1 is _____ ft.
Answer: D
Explanation:
The applicable requirement is found in 2021 IBC Section 504.3 and Table 504.3. The table regulates building height in feet above grade plane by occupancy, construction type, and sprinkler condition. For a Group I-4 occupancy equipped throughout with a Section 903.3.1.1 sprinkler system, the applicable row is the sprinklered "S" row.
Reading across that row to Type IV-B construction gives a maximum building height of 120 feet. Therefore, option B is correct. The 180-foot value applies to Type IV-A construction for the same occupancy and sprinkler condition. The 85-foot value, which is not offered, applies to Type IV-C and Type IV-HT. The 270- foot value generally appears for certain lower-hazard occupancies-such as Groups A, B, E, F, M, S and U- when constructed as sprinklered Type IV-A, but it is not permitted for Group I-4.
This distinction reflects the additional life-safety considerations associated with custodial-care occupancies. A special inspector should verify that the approved construction documents identify both the correct occupancy classification and construction type because either classification directly changes the permitted height.
References/Topics: 2021 IBC Section 504.3; Table 504.3, Group I-4, sprinklered Type IV-B construction; Section 903.3.1.1.
NEW QUESTION # 58
Refer to the exhibit by clicking on the EXHIBIT button above.
If the glulam beam and CLT panels all require a fire-resistance rating of 2 hours, what is the required fire- resistance rating in hours for the structural connections between the glulam and CLT?
Answer: A
Explanation:
The structural connections must maintain a fire-resistance rating corresponding to the required rating of the structural elements they connect. Because both the glulam beam and CLT panels require a two-hour fire- resistance rating, their connections must also provide two hours of fire resistance. Therefore, option C is correct.
Concealing steel hardware inside a timber member does not eliminate the fire-resistance requirement. Steel rapidly conducts heat and can lose strength, while timber surrounding a concealed connector can char, split, or withdraw from fasteners. The connection must consequently be protected through sufficient wood cover, noncombustible protection, tested assemblies, or an approved engineering analysis demonstrating acceptable connection temperatures and capacity for the entire required duration.
A three-hour rating is not required merely as a generalized safety factor; the code requires correspondence with the connected elements unless the approved design establishes another condition. A one-hour connection would create a premature weak point in the load path, and a zero-hour rating would be unacceptable simply because the hardware is hidden.
References/Topics: 2021 IBC Section 2304.10.1; fire-resistance rating of mass timber connections; protected concealed steel hardware.
NEW QUESTION # 59
What fire-resistance rating is required for floors in Type IV-A, IV-B and IV-C construction?
Answer: D
Explanation:
IBC Table 601 requires floor construction and associated secondary structural members in Types IV-A, IV-B, and IV-C construction to have a two-hour fire-resistance rating. Therefore, option B is correct.
This requirement applies to the complete floor assembly, not only the timber panel. The required two-hour performance may be established through the calculated fire resistance of the mass timber, the contribution of approved noncombustible protection, or a permitted combination of both. Any topping, protective membrane, connection protection, and edge condition that forms part of the approved rated design must be installed accordingly.
The ratings for other building elements should not be transferred to the floor. A three-hour rating applies to the primary structural frame and bearing walls of Type IV-A, but its floor construction remains two hours.
Type IV-B and Type IV-C floors also require two hours, even though those construction types permit different degrees of exposed mass timber.
The special inspector must verify panel dimensions, approved layup, protection layers, joints, penetrations, connections, topping thickness, and other details that influence the floor's rated performance.
References/Topics: 2021 IBC Sections 601 and 602.4; Table 601, floor construction and associated secondary structural members.
NEW QUESTION # 60
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