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| Section | Objectives |
|---|---|
| Topic 1: Construction Fire Safety | - International Fire Code requirements - Construction-phase fire safety requirements - Protection of mass timber during construction |
| Topic 2: Structural Inspection | - Connections and fastening systems - Mass timber structural elements - Structural loads and related code requirements |
| Topic 3: Code Compliance and Related Requirements | - Sound transmission requirements - Energy code requirements applicable to mass timber buildings - Documentation and verification of compliance |
| Topic 4: Fire Protection and Fire-Resistance | - Fire-resistance requirements - Fire protection systems and related provisions - Noncombustible protection and protection of mass timber elements |
| Topic 5: Special Inspection Requirements | - Special inspection procedures for tall mass timber buildings - Inspection of connections and protective materials - Inspector duties and responsibilities |
| Topic 6: 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 |
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NEW QUESTION # 17
Refer to the exhibit by clicking on the EXHIBIT button above.
Given: The connections between the glulam beam and CLT panels all require a fire-resistance rating of 2 hours, and wood cover is designed per AWC Technical Report 10 to provide the entire 2 hours of protection.
The bearing area between the CLT and glulam is the minimum required.
What are the minimum dimensions, in inches, for the wood block shown in red?
Answer: A
Explanation:
Under the illustrated connection detail, the minimum wood-block dimensions are 3 inches by 3 inches.
Therefore, option C is correct.
The block is part of the sacrificial wood-cover system used to protect the connection for the full two-hour fire- resistance period. It must provide sufficient timber beyond the protected connection region to account for calculated charring and the increased exposure that can develop at the interface between abutting wood members. Because the problem states that the CLT-to-glulam bearing area is already the minimum required, the primary members do not provide surplus material that can be credited as additional protection at that edge.
AWC connection-fire-design guidance requires the protective geometry to remain effective after the calculated char front advances. Char contraction can open a gap at abutting edges and expose material deeper in the connection than would occur on an uninterrupted planar surface. The 3-inch-by-3-inch block maintains the required protective envelope for the stated two-hour condition.
This dimension is specific to the illustrated configuration and assumptions; it is not a universal minimum for every mass timber connection. The inspector must verify the approved detail rather than substitute nominal blocking based solely on field availability.
References/Topics: AWC Technical Report 10; AWC Fire Design Specification provisions for wood-cover protection and char contraction at abutting members.
NEW QUESTION # 18
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: B
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 # 19
Refer to the exhibit by clicking on the EXHIBIT button above.
In the detail shown, if the connections between the glulam beam and CLT panels all require a fire-resistance rating of one (1) hour and the wood cover is designed per AWC Technical Report 10 to provide the entire 1 hour of protection, what is the minimum thickness and number of layers required for the locations shown in red?
Answer: C
Explanation:
Two layers of 5/8-inch Type X gypsum wallboard are required for the condition shown, so option D is correct. The relevant AWC TR10 connection-protection methodology distinguishes between outer gypsum layers and the base layer immediately adjacent to the connection .
For 5/8-inch Type X gypsum board, an outer layer contributes 40 minutes. However, when gypsum board is being relied upon as the complete thermal-separation protection for a connection, TR10 reduces the contribution of the final/base layer to 50 percent. Therefore, the base layer contributes 20 minutes , while the second, exterior layer contributes 40 minutes . The total is:
20 minutes + 40 minutes = 60 minutes .
That satisfies the one-hour required protection period.
This is why simply looking at the normal 40-minute contribution of one 5/8-inch Type X layer would be incorrect for this connection condition. TR10 expressly uses the reduced base-layer contribution when gypsum constitutes the connection protection. The same methodology shows that four 5/8-inch Type X layers are needed for 120 minutes: 20 + 40 + 40 + 40 = 140 minutes, satisfying two hours.
References/Topics: AWC Technical Report No. 10, Sections 4.4.2 and connection-protection examples. TR10 states that outer 5/8-inch Type X layers provide 40 minutes each while the base layer provides 20 minutes.
NEW QUESTION # 20
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 # 21
In Type IV-C construction, the fire-resistance rating provided by protection over a connection can be determined by which of the following?
Answer: A
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 # 22
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