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| Section | Objectives |
|---|---|
| Topic 1: Structural Inspection | - Mass timber structural elements - Structural loads and related code requirements - Connections and fastening systems |
| Topic 2: Fire Protection and Fire-Resistance | - Fire-resistance requirements - Noncombustible protection and protection of mass timber elements - Fire protection systems and related provisions |
| Topic 3: Tall Mass Timber Building Code Provisions | - International Building Code requirements for tall mass timber construction - Mass timber materials and construction requirements - Types IV-A, IV-B and IV-C construction |
| Topic 4: Special Inspection Requirements | - Inspector duties and responsibilities - Inspection of connections and protective materials - Special inspection procedures for tall mass timber buildings |
| Topic 5: Construction Fire Safety | - Protection of mass timber during construction - International Fire Code requirements - Construction-phase fire safety requirements |
| Topic 6: Code Compliance and Related Requirements | - Sound transmission requirements - Energy code requirements applicable to mass timber buildings - Documentation and verification of compliance |
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NEW QUESTION # 38
In mass timber construction of Type IV-B, each of the following is suitable for use as fireblocking except:
Answer: D
Explanation:
A 7/16-inch wood structural panel does not satisfy the prescribed minimum thickness for fireblocking.
Therefore, option C is the exception.
IBC Section 718.2.1 permits one thickness of 23/32-inch wood structural panel where the joints are properly backed. A 7/16-inch panel is substantially thinner and cannot be substituted without an approved alternative- material determination. The code also recognizes one-half-inch gypsum board and properly installed batts or blankets of mineral wool or other approved materials.
Mass timber complying with Section 2304.11 is also permitted as fireblocking. Its large cross section provides resistance to the movement of flame, hot gases, and smoke through a concealed space that is at least equivalent to the nominal lumber traditionally accepted for this purpose.
The inspector must distinguish fireblocking from a tested firestop system. Fireblocking divides or interrupts concealed combustible cavities; it does not automatically protect a penetration through a fire-resistance-rated wall or floor. Installation must completely fill or close the required space, remain securely supported, and comply with requirements for joints, edges, penetrations, and mineral-fiber compression.
References/Topics: 2021 IBC Section 718.2.1; Section 2304.11; approved fireblocking materials in mass timber construction.
NEW QUESTION # 39
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 # 40
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: C
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 # 41
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: B
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 # 42
Refer to the figure by clicking on the EXHIBIT button above.
In Type IV-B construction, based on a 900 sq. ft. floor area, a 30 ' room width, and a 12 in. x 18 in. beam as shown in the Figure, the maximum length of the unprotected portion of the mass timber ceiling (dimension X) is _____ feet.
Answer: D
Explanation:
Section 602.4.2.2.2 permits unprotected mass timber ceilings in Type IV-B construction to equal no more than 20 percent of the floor area , and the code expressly states that attached beams are included when determining that exposed ceiling area.
The floor area is 900 square feet:
20% ร 900 = 180 sq. ft. maximum exposed area .
The exposed 12-inch ร 18-inch beam extends across the 30-foot room. Its three exposed surfaces consist of the 12-inch-wide bottom and two 18-inch-deep sides:
30 ft ร (1 ft + 1.5 ft + 1.5 ft) = 120 sq. ft.
Because the attached beam counts against the ceiling exposure allowance, only:
180 # 120 = 60 sq. ft.
remains available for the exposed ceiling itself.
The exposed ceiling extends across the 30-foot room width, so:
30 ft ร X = 60 sq. ft.
Therefore:
X = 2 ft .
Option A is correct. Ignoring the beam surfaces would overstate the permitted ceiling exposure and would contradict the explicit IBC requirement that attached beams be included in the exposed ceiling calculation.
References/Topics: 2021 IBC Section 602.4.2.2.2, Exception 1.1; Type IV-B exposed ceiling and attached- beam area calculations.
NEW QUESTION # 43
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