2025 IRC EXAM- CHAPTER 4 – FOUNDATIONS QUESTIONS WITH CORRECT ANSWERS 2025

2025 IRC EXAM- CHAPTER 4 – FOUNDATIONS
QUESTIONS WITH CORRECT ANSWERS 2025
InGtheGabsenceGofGaGcompleteGgeotechnicalGevaluationGtoGdetermineGtheGsoil'sGcharacteristics,GsandyGgra
velGmaterialGshallGbeGassumedGtoGhaveGaGpresumptiveGload-bearingGvalueGofG_________Gpsf.G-
GcorrectGanswer-3,000Gpsf




R401.4.1GSoilGtests.



InGtheGabsenceGofGaGcompleteGgeotechnicalGevaluationGtoGdetermineGtheGsoil'sGcharacteristics,Gsand,Gsilty
Gsand,GclayeyGsand,GsiltyGgravel,GandGclayeyGgravelGmaterialGshallGbeGassumedGtoGhaveGaGpresumptiveGload

-bearingGvalueGofG_________Gpsf.G-GcorrectGanswer-2,000Gpsf



R401.4.1GSoilGtests.



InGtheGabsenceGofGaGcompleteGgeotechnicalGevaluationGtoGdetermineGtheGsoil'sGcharacteristics,Gclay,Gsand
y,GsiltyGclay,GclayeyGsilt,Gsilt,GandGsandyGsiltclayGshallGbeGassumedGtoGhaveGaGpresumptiveGload-
bearingGvalueGofG_________Gpsf.G-GcorrectGanswer-1,500Gpsf



R401.4.1GSoilGtests.



InGtheGabsenceGofGaGcompleteGgeotechnicalGevaluationGtoGdetermineGtheGsoil'sGcharacteristics,Gcrystalline
GbedrockGshallGbeGassumedGtoGhaveGaGpresumptiveGload-bearingGvalueGofG_________Gpsf.G-

GcorrectGanswer-12,000




R401.4.1GSoilGtests.



InGtheGabsenceGofGaGcompleteGgeotechnicalGevaluationGtoGdetermineGtheGsoil'sGcharacteristics,Gsedimenta
ryGandGfoliatedGrockGshallGbeGassumedGtoGhaveGaGpresumptiveGload-bearingGvalueGofG_________Gpsf.G-
GcorrectGanswer-4,000




R401.4.1GSoilGtests.

, ConcreteGusedGinGaGbasementGslabGshallGhaveGaGminimumGstrengthGofG________GpsiGwhereGaGsevereGwea
theringGpotentialGexists.G-GcorrectGanswer-2,500Gpsi



R402.2GConcrete.



MinimumGcompressiveGstrengthGofGconcreteGwhetherGorGnotGitGisGexposedGtoGweatherGisG________Gpsi.G-
GcorrectGanswer-2,500Gpsi




R402.2GConcrete.



WhereGthereGisGevidenceGthatGtheGgroundwaterGtableGcanGriseGtoGwithinG________GinchesGofGtheGfinished
GfloorGatGtheGbuildingGperimeter,GtheGgradeGinGtheGunder-

floorGspaceGshallGbeGasGhighGasGtheGoutsideGfinishedGgradeGunlessGanGapprovedGdrainageGsystemGisGprovid
ed.G-GcorrectGanswer-6"



R408.6GUnder-floorGspace.



TheGminimumGWidthGandGThicknessGforGconcreteGfootingsGshallGnotGbeGlessGthanG________GinchesGinGWi
dthGandG__________GinchesGinGdepth.G-GcorrectGanswer-12

6



R403.1.1GMinimumGsize.



FootingGprojectionsGshallGnotGbeGlessGthanG_________GandGshallGnotGexceedGtheGthicknessGofGtheGfooting.
G-GcorrectGanswer-2Ginches




R403.1.1GMinimumGsize.



AllGexteriorGfootingsGshallGbeGplacedGatGleastG_________GinchesGbelowGtheGundisturbedGgroundGsurface.G-
GcorrectGanswer-12Ginches




R403.1.4GMinimumGdepth.