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.
Handrailsvwithvavperimeterv greaterv thanv6v 1/4v inchesvrequirev av__________v___________v _________
____________v onvbothvsidesv ifvthevprofile.v-vcorrectv answer-
graspablev fingervrecessvarea
Woodv requiredvtov bev pressurev treatedvwherev itvisvrestingvonvconcretev thatv isvinvdirectv contactv withvt
he
ground.vSillvplates,v framing,v andvcolumnsvrestingvonvslabsvorvfoundationvwalls.v-vcorrectv answer-
R317.1vProtectionvofvWoodv AgainstvDecayv -vLocationvRequired
Woodv requiredvtov bev pressurev treatedv ifvwithinvthesevdistancesv invcrawlv spacesvtov thevexposedv groun
d:
- Woodv joists/bottomvofvwoodvstructuralvfloor:v ________v inches
- Woodv girder:v_________vinches
- Woodv columns:v________v inchesv-vcorrectv answer-18
12
8
R317.1v-vProtectionvofvWoodv Againstv Decayv -vLocationvrequired
Termitev protectionvforv woodvshallvbev _________v_________v ,vandvfield-
cutvends,vnotches,vandvdrilledvholesvshallvbev __________v invthevfieldvifvrequired.v-
v correctv answer-
pressurevtreated
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.
Handrailsvwithvavperimeterv greaterv thanv6v 1/4v inchesvrequirev av__________v___________v _________
____________v onvbothvsidesv ifvthevprofile.v-vcorrectv answer-
graspablev fingervrecessvarea
Woodv requiredvtov bev pressurev treatedvwherev itvisvrestingvonvconcretev thatv isvinvdirectv contactv withvt
he
ground.vSillvplates,v framing,v andvcolumnsvrestingvonvslabsvorvfoundationvwalls.v-vcorrectv answer-
R317.1vProtectionvofvWoodv AgainstvDecayv -vLocationvRequired
Woodv requiredvtov bev pressurev treatedv ifvwithinvthesevdistancesv invcrawlv spacesvtov thevexposedv groun
d:
- Woodv joists/bottomvofvwoodvstructuralvfloor:v ________v inches
- Woodv girder:v_________vinches
- Woodv columns:v________v inchesv-vcorrectv answer-18
12
8
R317.1v-vProtectionvofvWoodv Againstv Decayv -vLocationvrequired
Termitev protectionvforv woodvshallvbev _________v_________v ,vandvfield-
cutvends,vnotches,vandvdrilledvholesvshallvbev __________v invthevfieldvifvrequired.v-
v correctv answer-
pressurevtreated
retreated
