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| Section | Objectives |
|---|---|
| Topic 1: Special Inspection Requirements | - Inspector duties and responsibilities - Inspection of connections and protective materials - Special inspection procedures for tall mass timber buildings |
| Topic 2: Construction Fire Safety | - Construction-phase fire safety requirements - Protection of mass timber during construction - International Fire Code requirements |
| Topic 3: Structural Inspection | - Mass timber structural elements - Connections and fastening systems - Structural loads and related code requirements |
| Topic 4: Tall Mass Timber Building Code Provisions | - International Building Code requirements for tall mass timber construction - Types IV-A, IV-B and IV-C construction - Mass timber materials and construction requirements |
| Topic 5: Code Compliance and Related Requirements | - Documentation and verification of compliance - Sound transmission requirements - Energy code requirements applicable to mass timber buildings |
| Topic 6: Fire Protection and Fire-Resistance | - Fire protection systems and related provisions - Noncombustible protection and protection of mass timber elements - Fire-resistance requirements |
>> International Code Council 93-Tall-Mass-Timber-Buildings Latest Test Camp <<
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NEW QUESTION # 26
Fire-resistance ratings of members and assemblies can be established by all of the following except:
Answer: C
Explanation:
ASTM E84 is not a test for establishing the fire-resistance rating of a structural member or building assembly.
Therefore, option B is the exception.
The 2021 IBC establishes fire-resistance ratings primarily through testing conducted in accordance with ASTM E119 or UL 263. Those tests evaluate whether an element or assembly can maintain structural performance, limit flame passage, and control temperature rise for a specified duration under standardized fire exposure. ASTM E84 instead evaluates surface-burning characteristics, principally flame-spread and smoke- developed indices. An E84 classification cannot establish that a wall, floor, beam, column, or connection possesses a one-, two-, or three-hour fire-resistance rating.
The IBC also recognizes approved prescriptive designs under Section 721, calculated fire resistance under Section 722, and designs documented in approved sources or supported by permitted analytical methods.
Those are valid methods represented by options A, C, and D.
For inspection purposes, the approved construction documents must identify the method used to establish the rating. The inspector must then verify that the installed materials, dimensions, loading assumptions, protective layers, fasteners, joints, and connection details match the tested, calculated, or prescriptive design.
References/Topics: 2021 IBC Sections 703.2, 703.2.1, 721 and 722; ASTM E119 and UL 263 fire-resistance testing.
NEW QUESTION # 27
Which of the following is true regarding Type IV-B unprotected portions of mass timber ceilings and walls?
Answer: B
Explanation:
Type IV-B construction is fundamentally protected mass timber construction, but the 2021 IBC permits specifically limited areas of interior mass timber to remain exposed. Section 602.4.2.2.2 establishes two independent exposure limits. Unprotected portions of mass timber ceilings, including attached beams, are limited to 20 percent of the floor area of the dwelling unit or fire area. Unprotected portions of mass timber walls, including attached columns, are limited to 40 percent of that floor area . Accordingly, option C correctly states the permitted percentages.
These percentages do not operate in isolation. Exposed areas must also comply with Section 602.4.2.2.4, which establishes separation requirements between unprotected mass timber surfaces. Where both walls and ceilings are exposed within the same dwelling unit or fire area, Section 602.4.2.2.3 requires use of the mixed- unprotected-area equation rather than independently maximizing both percentages.
Option A describes neither Type IV-B nor its controlled-exposure concept. Option B incorrectly characterizes Type IV-B as requiring complete encapsulation. Option D reverses the ceiling and wall percentages.
References/Topics: 2021 IBC Sections 602.4.2.2.2, 602.4.2.2.3 and 602.4.2.2.4; Type IV-B permitted exposed mass timber.
NEW QUESTION # 28
In mass timber construction of Type IV-C, the fire-resistance ratings of bearing walls are permitted to be reduced by _____ where supporting a roof only.
Answer: B
Explanation:
The permitted reduction is one hour. Table 601 assigns a two-hour base fire-resistance rating to exterior and interior bearing walls in Type IV-C construction. Footnote "a" to the table permits the ratings of the primary structural frame and bearing walls to be reduced by one hour where those elements support a roof only.
Accordingly, a Type IV-C bearing wall that supports only roof construction may be assigned a one-hour rating after application of the permitted reduction. The allowance recognizes that the element is not carrying occupied floor levels above and therefore presents a lower consequence of progressive structural failure than a wall supporting one or more floors.
The reduction is not automatic merely because a bearing wall is located at the upper story. The approved structural documents must establish that the wall supports only the roof and does not carry floor loads, transfer loads, elevated mechanical platforms, occupied rooftop structures, or other construction that invalidates the condition.
Options A and B are not reductions specified by Table 601. Option D would eliminate the entire two-hour rating and is not permitted. The inspector should verify the applicable rating and the precise load path before accepting reduced fire protection at the top story.
References/Topics: 2021 IBC Table 601, Footnote "a"; Type IV-C bearing walls and roof-support rating reduction.
NEW QUESTION # 29
The fire-resistance of a protected mass timber assembly is equivalent to the fire resistance time of the:
Answer: D
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 # 30
Periodic special inspection of sealants or adhesives as specified by the International Building Code Section
703.7 shall be conducted at which of the following locations?
Answer: C
Explanation:
IBC Section 703.7 requires sealant or adhesive to resist air passage at the abutting edges and intersections of mass timber building elements where those elements are required to be fire-resistance rated. Section 1705.20 then requires periodic special inspection where those prescribed sealants or adhesives are installed. Option C repeats that first required location accurately.
Option D is defective because the code requires sealing at an intersection between mass timber and another material only where both intersecting building elements are required to be fire-resistance rated. The phrase
"one or the other" materially weakens the condition. Option A is also too broad. A code-defined joint is not automatically subject to Section 703.7; fire-resistant joint systems are separately regulated by Section 715 and, where applicable, Section 1705.18.
Option B describes the exception in reverse. Sealant or adhesive need not be added under Section 703.7 where it is not a required component of the tested fire-resistance-rated assembly. When it is part of the listed or tested assembly, it must be installed accordingly, but that statement does not identify the primary location requested.
References/Topics: 2021 IBC Sections 703.7 and 1705.20; sealing of adjacent rated mass timber elements; periodic inspection.
NEW QUESTION # 31
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