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.
Handrailsxwithxaxperimeterx greaterx thanx6x 1/4x inchesxrequirex ax__________x___________x _________
____________x onxbothxsidesx ifxthexprofile.x-xcorrectx answer-
graspablex fingerxrecessxarea
Woodx requiredxtox bex pressurex treatedxwherex itxisxrestingxonxconcretex thatx isxinxdirectx contactx withxt
he
ground.xSillxplates,x framing,x andxcolumnsxrestingxonxslabsxorxfoundationxwalls.x-xcorrectx answer-
R317.1xProtectionxofxWoodx AgainstxDecayx -xLocationxRequired
Woodx requiredxtox bex pressurex treatedx ifxwithinxthesexdistancesx inxcrawlx spacesxtox thexexposedx groun
d:
- Woodx joists/bottomxofxwoodxstructuralxfloor:x ________x inches
- Woodx girder:x_________xinches
- Woodx columns:x________x inchesx-xcorrectx answer-18
12
8
R317.1x-xProtectionxofxWoodx Againstx Decayx -xLocationxrequired
Termitex protectionxforx woodxshallxbex _________x_________x ,xandxfield-
cutxends,xnotches,xandxdrilledxholesxshallxbex __________x inxthexfieldxifxrequired.x-
x correctx answer-
pressurextreated
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.
Handrailsxwithxaxperimeterx greaterx thanx6x 1/4x inchesxrequirex ax__________x___________x _________
____________x onxbothxsidesx ifxthexprofile.x-xcorrectx answer-
graspablex fingerxrecessxarea
Woodx requiredxtox bex pressurex treatedxwherex itxisxrestingxonxconcretex thatx isxinxdirectx contactx withxt
he
ground.xSillxplates,x framing,x andxcolumnsxrestingxonxslabsxorxfoundationxwalls.x-xcorrectx answer-
R317.1xProtectionxofxWoodx AgainstxDecayx -xLocationxRequired
Woodx requiredxtox bex pressurex treatedx ifxwithinxthesexdistancesx inxcrawlx spacesxtox thexexposedx groun
d:
- Woodx joists/bottomxofxwoodxstructuralxfloor:x ________x inches
- Woodx girder:x_________xinches
- Woodx columns:x________x inchesx-xcorrectx answer-18
12
8
R317.1x-xProtectionxofxWoodx Againstx Decayx -xLocationxrequired
Termitex protectionxforx woodxshallxbex _________x_________x ,xandxfield-
cutxends,xnotches,xandxdrilledxholesxshallxbex __________x inxthexfieldxifxrequired.x-
x correctx answer-
pressurextreated
retreated
