IRC Building Code Questions & Answers
1.In Seismic Design Categories D0, D1, and D2, stone masonry walls
shall not be used.
Answer Rubble
R404.1.1.1 Masonry foundation walls.
2.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.
Answer #4
#4
R403.1.3.1 Foundations with stem-walls
3.The grade away from foundation walls shall fall a minimum of inches
within the first feet.
Answer 6 in.
10 ft.
(Read exception)
R401.3 Drainage
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,4.In flood hazard areas, enclosed areas below the design flood elevation
shall be used sole for
1.
2.
3.
Answer Parking of
vehicles Building access
or
Storage
R322.3.5 Enclosed areas below design flood elevation.
5.Address number shall be a minimum of inches high with a
minimum stroke of inch.
Answer 4 in.
1/2 in.
R319.1 Address numbers
6.Protection of wood and wood based products from shall be provided
by the use of naturally durable wood or wood that is preservative treated.
Answer Decay
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,R317.1 Location required
7.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.
Answer 1 hour
R302.3 Two family dwellings
8.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.
Answer 6 in.
R318.4 Foam plastic protection
9.A thermal barrier is not required for foam plastic insulation in an attic
that is entered only for purposes of or .
Answer Repairs or maintenance
R316.5.3 Attics
10.Foam plastic shall be separated from the interior of a building by an ap-
proved of minimum - inch gypsum wallboard.
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, Answer Thermal barrier 1/2 in.
R316.4 Thermal barrier
11.All exterior footings shall be placed at least inches below the undis-
turbed ground surface.
Answer 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
12.The top surface of footings shall be level. The bottom surface of footings
shall not have a slope exceeding unit vertical in units horizontal.
Answer – 1:10
R403.1.5 Slope
13.Wood sill plates shall be anchored to the foundation with anchor
bolts spaced a maximum of feet on center.
Answer 6 ft.
R403.1.6 Foundation anchorage
14.Foundation anchor bolts shall be at least inch in diameter and shall
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1.In Seismic Design Categories D0, D1, and D2, stone masonry walls
shall not be used.
Answer Rubble
R404.1.1.1 Masonry foundation walls.
2.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.
Answer #4
#4
R403.1.3.1 Foundations with stem-walls
3.The grade away from foundation walls shall fall a minimum of inches
within the first feet.
Answer 6 in.
10 ft.
(Read exception)
R401.3 Drainage
1/
44
,4.In flood hazard areas, enclosed areas below the design flood elevation
shall be used sole for
1.
2.
3.
Answer Parking of
vehicles Building access
or
Storage
R322.3.5 Enclosed areas below design flood elevation.
5.Address number shall be a minimum of inches high with a
minimum stroke of inch.
Answer 4 in.
1/2 in.
R319.1 Address numbers
6.Protection of wood and wood based products from shall be provided
by the use of naturally durable wood or wood that is preservative treated.
Answer Decay
2/
44
,R317.1 Location required
7.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.
Answer 1 hour
R302.3 Two family dwellings
8.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.
Answer 6 in.
R318.4 Foam plastic protection
9.A thermal barrier is not required for foam plastic insulation in an attic
that is entered only for purposes of or .
Answer Repairs or maintenance
R316.5.3 Attics
10.Foam plastic shall be separated from the interior of a building by an ap-
proved of minimum - inch gypsum wallboard.
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44
, Answer Thermal barrier 1/2 in.
R316.4 Thermal barrier
11.All exterior footings shall be placed at least inches below the undis-
turbed ground surface.
Answer 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
12.The top surface of footings shall be level. The bottom surface of footings
shall not have a slope exceeding unit vertical in units horizontal.
Answer – 1:10
R403.1.5 Slope
13.Wood sill plates shall be anchored to the foundation with anchor
bolts spaced a maximum of feet on center.
Answer 6 ft.
R403.1.6 Foundation anchorage
14.Foundation anchor bolts shall be at least inch in diameter and shall
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