M5, M10,used for P.C.C and now a days M15 grade of concrete
has been widely used for PCC.
Where as M20,M25 used for footings,columns,beams&slabs.
From M30 grade of concrete onwards it is Design Mix
a)If column dimensions are 250*400mm , what will be
cutting length for 8mm stirrups and how to calculate it? b)
If beam dimensions are 200*400mm , beam coveris 25mm , slab
cover is 20mm , what will be the cutting length for
stirrups? c)Column dimensions are 250*400mm , reinf. is
12nos. bar of 16mm dia , stirrups provided are two legged,
what will be the length of each ring?