CHECK FOR COMPRESSIVE STRESS AT JACK POCKETS
JACK POCKET
305 MM
760 MM HYDRAULIC JACKS (3 NOS.)
JACKING LOAD PER HYDRAULIC JACK NO. OF HYDRAULIC JACKS PER POCKET TOTAL LOAD AT EACH JACK POCKET
= = =
50 3 150
T Nos. T
SURFACE AREA OF JACK POCKET COMPRESSIVE STRESS AT EACH JACK POCKET
= =
231800 6.342
SQMM N/SQMM
GRADE OF CONCRETE FOR RCC BOX PERMISSIBLE COMPRESSIVE STRESS
= =
40 13.6
N/SQMM N/SQMM
SINCE COMPRESSIVE STRESS GENERATED AT JACK POCKET IS LESS THAN PERMISSIBLE COMPRESSIVE STRESS,THEREFORE THE CONCRETE CAN SAFELY WITHSTAND THE JACKING LOAD