93-Tall-Mass-Timber-Buildings 試験問題を無料オンラインアクセス

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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.

• A.2
• B.6
• C.8
• D.4

The maximum allowable height for a Group I-4 building of Type IV-B construction provided with an automatic sprinkler system in accordance with Section 903.3.1.1 is _____ ft.

• A.120
• B.180
• C.270
• D.60

According to UL Fire Resistance Directory, a "finish rating" is the time:

• A.it takes the surface of wood nearest the fire but beneath the protective cover to reach a temperature rise of 325°F
• B.it takes the surface of wood nearest the fire but beneath the protective cover to reach a temperature rise of 250°F
• C.assigned for noncombustible protection in IBC Table 722.7.1(2)
• D.assigned for gypsum board membranes in IBC Table 722.6.2(1)

Both surfaces of a two-hour-rated mass timber wall that serves as a required separation between a Group R and Group I-2 occupancy in a Type IV-C building must be protected by at least which of the following?

• A.Materials providing at least 1 hour of fire resistance
• B.Two layers of 5/8-inch Type X gypsum board or equivalent
• C.No requirement as long as the wall is 2-hour rated
• D.One half inch gypsum board or a noncombustible equivalent

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.

• A.1-hour
• B.45-minutes
• C.30-minutes
• D.2-hours