I have house plan for 22.5* 40. Max room size is 11*11. All room corners has
columns. My mistri has 30 years of
onsite experience in residential construction.
I told him to use m15 in column footing and m20 in columns above plinth
level. He said for above mentioned grades we need vibrator and concrete mixer
which is not economical option for smaller plots having maximum span less than
16 feet. He told me to use 1:2.5:4 through out the columns upto 2 storey
building as we needed to mix concrete by hand and if bajri is more then concrete
will not get smooth.
1:2.5:4, or 1:3:3
or 1:3:4 is prevailing commonly in our area when I asked some other mistris.
He will be using mixer and vibrator for rcc slab only
What to do sir?