IRC Building Code Questions with
correct Answers 2024
In Seismic Design Categories D0, D1, and D2, _____ stone masonry walls shall
not be used. - -Rubble
R404.1.1.1 Masonry foundation walls.
-In Seismic Design Categories Do, D1 and D2, foundations with stem walls
shall be provided with a minimum of one No. ___ bar within 12 inches of the
top of the wall and one No. ___ bar located 3 to 4 inches from the bottom of
the footing. - -#4
#4
R403.1.3.1 Foundations with stemwalls
-The grade away from foundation walls shall fall a minimum of ___ inches
within the first ____ feet. - -6 in.
10 ft.
(Read exception)
R401.3 Drainage
-In flood hazard areas, enclosed areas below the design flood elevation shall
be used sole for:
1._____
2._____
3._____ - -Parking of vehicles
Building access or
Storage
R322.3.5 Enclosed areas below design flood elevation.
-Address number shall be a minimum of ___ inches high with a minimum
stroke of ____inch. - -4 in.
1/2 in.
R319.1 Address numbers
-Protection of wood and wood based products from ___ shall be provided by
the use of naturally durable wood or wood that is preservative treated. - -
Decay
R317.1 Location required
, -Dwelling Units in two-family dwellings shall be separated from each other
by wall and/or floor assemblies having not less than ___-hour fire resistive
rating. - -1 hour
R302.3 Two family dwellings
-In areas where the probability of termite infestation is "very heavy", the
clearance between foam plastics installed above grade and exposed earth
shall be at least ____ inches. - -6 in.
R318.4 Foam plastic protection
-A thermal barrier is not required for foam plastic insulation in an attic that
is entered only for purposes of ____ or ____. - -Repairs or maintenance
R316.5.3 Attics
-Foam plastic shall be separated from the interior of a building by an
approved ____ ____ of minimum ____- inch gypsum wallboard. - -Thermal
barrier
1/2 in.
R316.4 Thermal barrier
-All exterior footings shall be placed at least ___ inches below the
undisturbed ground surface. - -12 in.
(Where applicable, the dept of footings shall also conform to R403.1.4.1 -
R403.1.4.2)
R403.1.4 Minimum length
-The top surface of footings shall be level. The bottom surface of footings
shall not have a slope exceeding ____ unit vertical in ____ units horizontal. - -
1:10
R403.1.5 Slope
-Wood sill plates shall be anchored to the foundation with anchor bolts
spaced a maximum of ____ feet on center. - -6 ft.
R403.1.6 Foundation anchorage
-Foundation anchor bolts shall be at least ___ inch in diameter and shall
extend a minimum of ___ inches into the concrete or grouted cells of
concrete masonry units. - -1/2 in.
7 in.
, R403.1.6 Foundation anchorage
-Isolated hollow masonry piers shall have a minimum nominal thickness of
____ inches. - -8 in.
R404.1.9 Isolated masonry piers.
-Hollow masonry piers shall be capped with ____ inches of solid masonry or
concrete or a masonry cap block. - -4 in.
As an alternative, the cavities of of the top course must be filled with
concrete or grout.
R404.1.9.1
-The studs used in wood foundation walls shall be ____-inch by ____-inch
members. - -2-inch by 6-inch
R404.2.2 Stud size
-Wood sill plates shall be a minimum of ____-inch by ____-inch nominal
lumber. - -2-inch by 4-inch
R404.3 Wood sill plates
-Perforated foundation drains shall be surrounded with an approved ____
____. - -Filter membrane
(or the filter membrane shall cover the washed gravel or crushed rock
covering the drain)
R405.1 Concrete or masonry foundations
-The minimum net area of ventilation openings shall be not less than ____
square foot for each ___ square feet of under-floor space. - -1 sq. ft. for each
150 sq. ft.
R408.1 Ventilation
-Ventilation openings in under-floor spaces are not required where the
ground is covered with a continuous ____ vapor retarder and the joints
overlap at least ____ inches. - -Class I
6
R408.3 Unvented crawl space
-The minimum required floor access opening to all under-floor spaces shall
be ____ inches by ____ inches. - -18 inches by 24 inches.
correct Answers 2024
In Seismic Design Categories D0, D1, and D2, _____ stone masonry walls shall
not be used. - -Rubble
R404.1.1.1 Masonry foundation walls.
-In Seismic Design Categories Do, D1 and D2, foundations with stem walls
shall be provided with a minimum of one No. ___ bar within 12 inches of the
top of the wall and one No. ___ bar located 3 to 4 inches from the bottom of
the footing. - -#4
#4
R403.1.3.1 Foundations with stemwalls
-The grade away from foundation walls shall fall a minimum of ___ inches
within the first ____ feet. - -6 in.
10 ft.
(Read exception)
R401.3 Drainage
-In flood hazard areas, enclosed areas below the design flood elevation shall
be used sole for:
1._____
2._____
3._____ - -Parking of vehicles
Building access or
Storage
R322.3.5 Enclosed areas below design flood elevation.
-Address number shall be a minimum of ___ inches high with a minimum
stroke of ____inch. - -4 in.
1/2 in.
R319.1 Address numbers
-Protection of wood and wood based products from ___ shall be provided by
the use of naturally durable wood or wood that is preservative treated. - -
Decay
R317.1 Location required
, -Dwelling Units in two-family dwellings shall be separated from each other
by wall and/or floor assemblies having not less than ___-hour fire resistive
rating. - -1 hour
R302.3 Two family dwellings
-In areas where the probability of termite infestation is "very heavy", the
clearance between foam plastics installed above grade and exposed earth
shall be at least ____ inches. - -6 in.
R318.4 Foam plastic protection
-A thermal barrier is not required for foam plastic insulation in an attic that
is entered only for purposes of ____ or ____. - -Repairs or maintenance
R316.5.3 Attics
-Foam plastic shall be separated from the interior of a building by an
approved ____ ____ of minimum ____- inch gypsum wallboard. - -Thermal
barrier
1/2 in.
R316.4 Thermal barrier
-All exterior footings shall be placed at least ___ inches below the
undisturbed ground surface. - -12 in.
(Where applicable, the dept of footings shall also conform to R403.1.4.1 -
R403.1.4.2)
R403.1.4 Minimum length
-The top surface of footings shall be level. The bottom surface of footings
shall not have a slope exceeding ____ unit vertical in ____ units horizontal. - -
1:10
R403.1.5 Slope
-Wood sill plates shall be anchored to the foundation with anchor bolts
spaced a maximum of ____ feet on center. - -6 ft.
R403.1.6 Foundation anchorage
-Foundation anchor bolts shall be at least ___ inch in diameter and shall
extend a minimum of ___ inches into the concrete or grouted cells of
concrete masonry units. - -1/2 in.
7 in.
, R403.1.6 Foundation anchorage
-Isolated hollow masonry piers shall have a minimum nominal thickness of
____ inches. - -8 in.
R404.1.9 Isolated masonry piers.
-Hollow masonry piers shall be capped with ____ inches of solid masonry or
concrete or a masonry cap block. - -4 in.
As an alternative, the cavities of of the top course must be filled with
concrete or grout.
R404.1.9.1
-The studs used in wood foundation walls shall be ____-inch by ____-inch
members. - -2-inch by 6-inch
R404.2.2 Stud size
-Wood sill plates shall be a minimum of ____-inch by ____-inch nominal
lumber. - -2-inch by 4-inch
R404.3 Wood sill plates
-Perforated foundation drains shall be surrounded with an approved ____
____. - -Filter membrane
(or the filter membrane shall cover the washed gravel or crushed rock
covering the drain)
R405.1 Concrete or masonry foundations
-The minimum net area of ventilation openings shall be not less than ____
square foot for each ___ square feet of under-floor space. - -1 sq. ft. for each
150 sq. ft.
R408.1 Ventilation
-Ventilation openings in under-floor spaces are not required where the
ground is covered with a continuous ____ vapor retarder and the joints
overlap at least ____ inches. - -Class I
6
R408.3 Unvented crawl space
-The minimum required floor access opening to all under-floor spaces shall
be ____ inches by ____ inches. - -18 inches by 24 inches.
