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.
Handrailszwithzazperimeterz greaterz thanz6z 1/4z incheszrequirez az__________z ___________z __________
___________z onzbothzsidesz ifzthezprofile.z-zcorrectzanswer-graspablez fingerz recessz area
Woodz requiredztoz bez pressurez treatedz wherez itziszrestingzonzconcretezthatz iszinzdirectz contactz withzth
e
ground.zSillzplates,z framing,z andzcolumnszrestingzonzslabszorzfoundationzwalls.z-zcorrectz answer-
R317.1zProtectionzofzWoodz AgainstzDecayz -zLocationzRequired
Woodz requiredztoz bez pressurez treatedz ifzwithinzthesezdistancesz inzcrawlz spacesztoz thezexposedz ground
:
- Woodz joists/bottomzofzwoodzstructuralzfloor:z ________z inches
- Woodz girder:z _________zinches
- Woodz columns:z________z inchesz-zcorrectz answer-18
12
8
R317.1z-zProtectionzofzWoodz Againstz Decayz -zLocationzrequired
Termitez protectionzforz woodzshallzbez _________z_________z ,zandzfield-
cutzends,znotches,zandzdrilledzholeszshallzbez __________z inzthezfieldzifzrequired.z-
z correctz answer-
pressureztreated
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.
Handrailszwithzazperimeterz greaterz thanz6z 1/4z incheszrequirez az__________z ___________z __________
___________z onzbothzsidesz ifzthezprofile.z-zcorrectzanswer-graspablez fingerz recessz area
Woodz requiredztoz bez pressurez treatedz wherez itziszrestingzonzconcretezthatz iszinzdirectz contactz withzth
e
ground.zSillzplates,z framing,z andzcolumnszrestingzonzslabszorzfoundationzwalls.z-zcorrectz answer-
R317.1zProtectionzofzWoodz AgainstzDecayz -zLocationzRequired
Woodz requiredztoz bez pressurez treatedz ifzwithinzthesezdistancesz inzcrawlz spacesztoz thezexposedz ground
:
- Woodz joists/bottomzofzwoodzstructuralzfloor:z ________z inches
- Woodz girder:z _________zinches
- Woodz columns:z________z inchesz-zcorrectz answer-18
12
8
R317.1z-zProtectionzofzWoodz Againstz Decayz -zLocationzrequired
Termitez protectionzforz woodzshallzbez _________z_________z ,zandzfield-
cutzends,znotches,zandzdrilledzholeszshallzbez __________z inzthezfieldzifzrequired.z-
z correctz answer-
pressureztreated
retreated
