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| Section | Objectives |
|---|---|
| Topic 1: Tall Mass Timber Building Code Provisions | - Type IV Construction
- Special Inspection Requirements
|
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NEW QUESTION # 51
For CLT, which of the following standards is used for the determination of bond line shear test for adhesives?
Answer: C
Explanation:
ANSI/APA PRG 320 is the governing product standard for performance-rated cross-laminated timber, including adhesive qualification, bond integrity, manufacturing quality control, and required product identification. Accordingly, option D is correct.
Bond-line performance is critical because CLT panels depend on structural adhesive to transfer shear forces between laminations and maintain composite action. PRG 320 establishes qualification and quality-assurance requirements intended to verify that adhesive bonds remain structurally reliable and resist delamination or inadequate bond development. Testing and manufacturing controls under this standard address the completed CLT product rather than treating the adhesive as an isolated material.
AITC 113 concerns dimensional tolerances and related requirements for structural glued-laminated timber rather than CLT bond-line shear qualification. ASTM C557 addresses adhesives for ceramic tile and is unrelated to structural timber manufacture. ANSI 117 is not the governing CLT manufacturing standard.
During inspection, the special inspector ordinarily does not reproduce factory bond-line tests on-site. Instead, the inspector verifies the CLT manufacturer's identification, certification marks, panel grade, layup designation, and conformance with PRG 320 and the approved construction documents.
References/Topics: 2021 IBC Section 2303.1.4; ANSI/APA PRG 320; CLT adhesive-bond qualification and manufacturing quality assurance.
NEW QUESTION # 52
Which of the following best describes circumstances for which a separate inspection by a building official would be required for the fire protection of structural connections in buildings of Type IV-B construction?
Answer: B
Explanation:
A separate inspection by the building official is required where the fire resistance of a structural connection in Type IV-A, IV-B, or IV-C construction is provided by wood cover calculated in accordance with Section
2304.10.1. Therefore, option C is correct.
The required inspection occurs after the calculated wood cover has been installed but before additional coverings or finishes conceal the connection. This sequencing allows the building official to verify the actual cover thickness, geometry, continuity, fit, fastening, and correspondence with the approved fire-resistance design.
The requirement is distinct from routine Chapter 17 special inspection. Although a qualified special inspector may observe connection installation and mass timber erection, Section 110.3.5 expressly identifies a required building-department inspection for this calculated wood-cover condition. The inspection cannot be bypassed merely because the connection was observed during structural installation.
A rated joint system under Section 715 is governed by its tested or listed assembly requirements but is not the circumstance identified by this specific inspection provision. The other options do not state the code trigger.
Inspectors should therefore coordinate notification before the connection is enclosed because subsequent destructive exposure may otherwise be necessary.
References/Topics: 2021 IBC Sections 110.3.5 and 2304.10.1; inspection of calculated wood cover protecting mass timber connections.
NEW QUESTION # 53
The building owner shall be responsible for each of the following for fire safety during construction except:
Answer: D
Explanation:
The IFC does not require daily inspection documentation to be stored in a fire- and water-resistant safe.
Therefore, option C is the exception.
The owner or the owner's authorized agent must establish and maintain the required construction-site fire- prevention program and designate a site safety director. The site safety director is responsible for completing a daily fire-safety inspection covering the building and exterior project areas. The results must be documented, retained on-site until the certificate of occupancy is issued, and made immediately available to the fire code official upon request. Options A, B, and D accurately reflect these administrative requirements.
The purpose is not merely record retention. Daily inspections are intended to identify conditions such as obstructed fire apparatus access, blocked hydrants or fire department connections, exposed temporary wiring, improper hazardous-material storage, uncontrolled combustible debris, unavailable extinguishers, impaired standpipes, and deficient hot-work controls.
A special inspector is not automatically the site safety director. However, observations involving installed passive protection or unsafe construction conditions should be communicated through the approved reporting process. The owner remains accountable for implementing the site safety plan and maintaining the required documentation.
References/Topics: 2021 IFC Sections 3303.1 through 3303.3; site safety director and daily fire-safety inspection records.
NEW QUESTION # 54
Periodic special inspection of sealants or adhesives shall be conducted where sealants or adhesives are part of a mass timber building element as designated in the approved construction documents.
All of the following statements are correct in reference to sealants or adhesives in mass timber buildings except:
Answer: B
Explanation:
Option C is the incorrect statement. The sealing inspection requirements in IBC Section 1705.20 do not automatically apply to every item classified as a "joint" under Section 202. They apply specifically where a sealant or adhesive required by Section 703.7 is installed on mass timber building elements identified in the approved construction documents.
Section 703.7 addresses abutting edges and intersections of fire-resistance-rated mass timber elements and intersections between mass timber and other materials where both elements require a fire-resistance rating.
These conditions require periodic special inspection because continuity of the air seal affects the fire performance assumed for the timber assembly.
Option A is correct: qualifying sealants must comply with ASTM C920. Option B is also correct: adhesives used for this purpose must comply with ASTM D3498. Option D reflects the required inspection of sealant applications at the prescribed abutting edges and intersections, although the technically precise term is "mass timber building elements." Fire-resistant joint systems are governed separately by IBC Section 715 and may require inspection under Section 1705.18. The two inspection categories must not be treated as interchangeable.
References/Topics: 2021 IBC Sections 703.7, 715, 1705.18 and 1705.20; ASTM C920; ASTM D3498.
NEW QUESTION # 55
In Type IV-C construction, a connection between two members of the primary structural frame supporting a floor is required to be protected to achieve a minimum fire-resistance rating of:
Answer: B
Explanation:
The required minimum fire-resistance rating is two hours , making option C correct. Table 601 assigns a two- hour fire-resistance rating to the primary structural frame in Type IV-C construction. The structural connection between members of that rated frame cannot become a premature failure point in the load path.
IBC Section 2304.10.1 specifically addresses structural connections in Types IV-A, IV-B, and IV-C mass timber construction. Connection protection must provide the fire-resistance performance required for the connected building element. This can be accomplished through protected connection configurations, approved fire testing, or engineering analysis satisfying the applicable code criteria.
The connection includes more than the visible steel plate or bolt. Fasteners, connectors, concealed steel, bearing zones, and portions of the timber participating structurally in the connection must collectively maintain the required performance. A one-hour or 1ยฝ-hour connection would undermine a structural frame required to remain functional for two hours. Three hours is the primary-frame rating associated with Type IV- A, not the Type IV-C condition specified here.
The inspector should verify protection thickness, wood cover, gypsum layers, hardware embedment, edge conditions, and approved connection geometry before concealment.
References/Topics: 2021 IBC Table 601; Section 2304.10.1; fire-resistant structural connections in Types IV- A, IV-B, and IV-C.
NEW QUESTION # 56
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