2026 IRC EXAM CHAPTER 3 QUESTIONS
WITH CORRECT ANSWERS
Light switch is required at the top and bottom of interior stairs that have at least ____________ risers.
- correct answer-6
R303.7 Interior stairway illumination.
Smoke alarms must be minimum __________ feet from heat registers or paddle fans. - correct answer-
3
Exterior stairways shall be provided with an artificial light source located at the _________ _________
__. - correct answer-top landing
R303.8 Exterior stairway illumination.
A top landing is not required where a stairway of not more than ____________ risers is located on the
exterior side of the door, provided that the door does not swing over the stairway. - correct answer-2
R311.3.2 Floor elevations at other exterior doors.
Ceiling height for showers, tubs, and other bathroom and toilet room fixtures shall be minimum _____
______. - correct answer-80 inches (6'-8")
R305.1 Minimum height
Showers must be at least ___________ inches in each direction. - correct answer-30
R307.1 Space required.
_____________ inches minimum width of shower door. - correct answer-22
, _____________ inches minimum clearance in front of sinks and toilets. - correct answer-21
R307.1 Space required.
_____________ inches minimum width from center of a toilet to a wall or another fixture. -
correct answer-15
R307.1 Space required.
Handrailsc withc ac perimeterc greaterc thanc6c 1/4c inchescrequirec ac__________c ___________c __________
___________c oncbothc sidesc ifcthec profile.c -c correctc answer-graspablec fingerc recessc area
Woodc requiredc toc bec pressurec treatedc wherec itc isc restingc oncconcretec thatc isc inc directc contactc withc th
e
ground.c Sillc plates,c framing,c andc columnscrestingconcslabsc orc foundationc walls.c -ccorrectc answer-
R317.1cProtectioncofc Woodc Againstc Decayc -cLocationcRequired
Woodc requiredc toc bec pressurec treatedc ifcwithinc thesec distancesc inccrawlc spacesc toc thecexposedc ground
:
- Woodc joists/bottomcofcwoodc structuralc floor:c ________c inches
- Woodc girder:c _________c inches
- Woodc columns:c ________c inchesc -ccorrectc answer-18
12
8
R317.1c -cProtectioncofc Woodc Againstc Decayc -cLocationcrequired
Termitec protectionc forc woodcshallc bec _________c _________c ,c andc field-
cutc ends,c notches,c andc drilledc holesc shallc bec __________c incthec fieldc ifc required.c-
c correctc answer-
pressurec treated
retreated
WITH CORRECT ANSWERS
Light switch is required at the top and bottom of interior stairs that have at least ____________ risers.
- correct answer-6
R303.7 Interior stairway illumination.
Smoke alarms must be minimum __________ feet from heat registers or paddle fans. - correct answer-
3
Exterior stairways shall be provided with an artificial light source located at the _________ _________
__. - correct answer-top landing
R303.8 Exterior stairway illumination.
A top landing is not required where a stairway of not more than ____________ risers is located on the
exterior side of the door, provided that the door does not swing over the stairway. - correct answer-2
R311.3.2 Floor elevations at other exterior doors.
Ceiling height for showers, tubs, and other bathroom and toilet room fixtures shall be minimum _____
______. - correct answer-80 inches (6'-8")
R305.1 Minimum height
Showers must be at least ___________ inches in each direction. - correct answer-30
R307.1 Space required.
_____________ inches minimum width of shower door. - correct answer-22
, _____________ inches minimum clearance in front of sinks and toilets. - correct answer-21
R307.1 Space required.
_____________ inches minimum width from center of a toilet to a wall or another fixture. -
correct answer-15
R307.1 Space required.
Handrailsc withc ac perimeterc greaterc thanc6c 1/4c inchescrequirec ac__________c ___________c __________
___________c oncbothc sidesc ifcthec profile.c -c correctc answer-graspablec fingerc recessc area
Woodc requiredc toc bec pressurec treatedc wherec itc isc restingc oncconcretec thatc isc inc directc contactc withc th
e
ground.c Sillc plates,c framing,c andc columnscrestingconcslabsc orc foundationc walls.c -ccorrectc answer-
R317.1cProtectioncofc Woodc Againstc Decayc -cLocationcRequired
Woodc requiredc toc bec pressurec treatedc ifcwithinc thesec distancesc inccrawlc spacesc toc thecexposedc ground
:
- Woodc joists/bottomcofcwoodc structuralc floor:c ________c inches
- Woodc girder:c _________c inches
- Woodc columns:c ________c inchesc -ccorrectc answer-18
12
8
R317.1c -cProtectioncofc Woodc Againstc Decayc -cLocationcrequired
Termitec protectionc forc woodcshallc bec _________c _________c ,c andc field-
cutc ends,c notches,c andc drilledc holesc shallc bec __________c incthec fieldc ifc required.c-
c correctc answer-
pressurec treated
retreated
