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| Section | Objectives |
|---|---|
| Topic 1: Code Compliance and Related Requirements | - Energy code requirements applicable to mass timber buildings - Documentation and verification of compliance - Sound transmission requirements |
| Topic 2: Tall Mass Timber Building Code Provisions | - Types IV-A, IV-B and IV-C construction - Mass timber materials and construction requirements - International Building Code requirements for tall mass timber construction |
| Topic 3: Construction Fire Safety | - International Fire Code requirements - Protection of mass timber during construction - Construction-phase fire safety requirements |
| Topic 4: Fire Protection and Fire-Resistance | - Fire protection systems and related provisions - Noncombustible protection and protection of mass timber elements - Fire-resistance requirements |
| Topic 5: Structural Inspection | - Structural loads and related code requirements - Connections and fastening systems - Mass timber structural elements |
| Topic 6: Special Inspection Requirements | - Special inspection procedures for tall mass timber buildings - Inspector duties and responsibilities - Inspection of connections and protective materials |
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NEW QUESTION # 43
When Type X gypsum board is used as noncombustible protection over mass timber on the building ' s exterior walls, which of the following fasteners are permitted?
Answer: D
Explanation:
Option A reproduces one of the two permitted exterior gypsum-board fastening methods in 2021 IBC Section
722.7.2.2. Type X gypsum board used as noncombustible protection on the exterior side of mass timber walls may be attached using galvanized nails of minimum 12 gage with a 7/16-inch head and sufficient length to penetrate the mass timber at least 1 inch .
The code also permits ASTM C1002 Type S, W, or G screws, but those screws must likewise penetrate the mass timber a minimum of 1 inch . Options C and D are therefore incorrect because they specify only 3/4- inch and 7/8-inch penetration, respectively. Option B is incorrect because it substitutes 16-gage nails for the minimum 12-gage requirement.
Section 722.7.2.2 additionally requires exterior Type X gypsum-board layers to be fastened 12 inches on center each way and 6 inches on center at joints or ends. Panel-edge fasteners must be located at least 1 inch and not more than 2 inches from the edge.
These fastening details are part of the conditions necessary to claim the protection contribution in Table
722.7.1(2).
References/Topics: 2021 IBC Sections 722.7.1 and 722.7.2.2; exterior Type X gypsum-board protection.
NEW QUESTION # 44
The fire-resistance of a protected mass timber assembly is equivalent to the fire resistance time of the:
Answer: A
Explanation:
IBC Section 722.7 establishes the governing calculation principle for protected mass timber. The required fire resistance consists of the inherent fire resistance of the unprotected mass timber element plus the protection time contributed by the noncombustible protection . Therefore, option D is correct.
This approach recognizes two sequential protective mechanisms. First, the noncombustible covering delays heating and charring of the timber. After the credited protection period, the remaining mass timber cross section provides structural fire resistance through predictable charring behavior and residual section capacity.
Section 722.7.1 further requires the contribution of the covering material to comply with the prescribed protection times or to be established under Section 703.6.
Option A ignores the contribution of the protective membrane. Option B ignores the inherent structural fire resistance of the timber. Option C incorrectly substitutes a finish rating for the code-recognized protection contribution. A finish rating is a separate temperature-based performance concept and is not automatically additive as the protection time used by Section 722.7.
References/Topics: 2021 IBC Sections 602.4, 703.6, 722.7 and 722.7.1; calculation of protected mass timber fire resistance.
NEW QUESTION # 45
Given: Sealants or adhesives need not be provided where they are not a required component of a tested fire resistance rated assembly.
If a sealant is required, it must meet the requirement of ASTM:
Answer: C
Explanation:
A sealant required to resist air passage between qualifying mass timber elements must comply with ASTM C920. Therefore, option C is correct. ASTM C920 is the recognized specification for elastomeric joint sealants and establishes requirements for properties such as movement capability, adhesion, cohesion, hardness, weathering, and durability.
IBC Section 703.7 differentiates between the two materials: sealants must meet ASTM C920, while adhesives must meet ASTM D3498. Option D therefore applies to an adhesive rather than a sealant. ASTM E119 is the standard fire test used to establish the fire-resistance rating of structural members and assemblies; it does not serve as the product specification for the sealant. ASTM E114 is not the applicable standard under this provision.
The stated exception is important. Section 703.7 does not require an additional sealant or adhesive where it is not a required component of the tested fire-resistance-rated assembly. Where the approved assembly or code provision does require it, however, the specified product, location, joint preparation, backing material, depth, width, and tooling must match the approved construction documents.
References/Topics: 2021 IBC Section 703.7; ASTM C920 sealants; ASTM D3498 adhesives; tested fire- resistance-rated assemblies.
NEW QUESTION # 46
Regarding water supply for the protection of buildings under construction, when combustible building materials of the building under construction are delivered to a site, the minimum fire flow provided shall be
_____ gpm.
Answer: C
Explanation:
The minimum required fire flow is 500 gallons per minute. Therefore, option C is correct.
Under 2021 IFC Section 3313.2, an approved water supply must be available when combustible building materials for the building under construction are delivered to the project site. The hydrant supplying the required flow must be located within the prescribed distance of the combustible materials as measured along an approved fire apparatus access route. Where one hydrant cannot provide coverage to all combustible material locations, additional hydrants are required.
The 500-gpm requirement is the initial minimum associated with the delivery of combustible building materials. It should not be confused with the potentially greater fire-flow requirements applicable after vertical construction of a Type III, IV, or V building begins. Depending on fire separation distance and the building's calculated final fire-flow demand, a larger supply may be required under subsequent provisions.
Options A and B provide inadequate suppression capacity. Option D is not the baseline amount prescribed for the condition stated in the question. Inspectors and site safety personnel should verify that the water source is operational and accessible before substantial quantities of mass timber arrive on-site.
References/Topics: 2021 IFC Sections 3313.1 and 3313.2; construction-site water supply and combustible building materials.
NEW QUESTION # 47
In Type IV-C construction, the fire-resistance rating provided by protection over a connection can be determined by which of the following?
Answer: D
Explanation:
Option B is correct because the required protection time placed over a mass timber structural connection may be established through a code-recognized fire-resistance evaluation of that protective construction under standard fire exposure.
IBC Section 2304.10.1 regulates connections in Types IV-A, IV-B, and IV-C. The code allows connection fire performance to be demonstrated through testing where the connection is incorporated into the fire- resistance test or through an approved engineering analysis. AWC further clarifies that the protection applied over the connection must provide the necessary protection time and that its performance may be established using the methods recognized by IBC Section 703.3, including testing and engineering analysis based on ASTM E119 or UL 263 performance.
Option A is too narrow: testing an isolated fastener does not establish the fire protection of the entire connection. Options C and D also use the wrong temperature location. Where an engineering-analysis route is used, the temperature criterion applies to the connection itself , including connectors, fasteners, and portions of wood incorporated into the structural connection-not simply to the protected structural element or supported member.
References/Topics: 2021 IBC Section 2304.10.1; Section 703.3; AWC guidance on fire resistance of mass timber connections.
NEW QUESTION # 48
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