The design of columns should be made with regard to the total forces operating on the structure. In order to avoid errors, there are some important thumb rules which should be followed by every Civil engineer and Architect. The following three thumb rules should be followed: Columns Sizes Columns Spaces Columns Alignments

1. Important rules for making any column layout
The design of columns should be made with regard to the total forces operating on the
structure. In order to avoid errors, there are some important thumb rules which should
be followed by every Civil engineer and Architect.
The following three thumb rules should be followed:
1. Columns Sizes
2. Columns Spaces
3. Columns Alignments
Minimum Size of RCC columns: The size of the columns is based on the total loads
operating on the columns which range from axial loads and lateral loads. Large beam
spans cause bending moment in the beams as well as in columns which are drawn by
the stresses in the beams.
To apply this general thumb rule, presume a structure of G+1 floors high, with standard
6″ walls. Least size of an RCC column should not be under 9" x 12" (225mm x 300mm)
with 4 bars of 12 MM Fe415 Steel.
The dimension of the column should be 9″ x 12″ (225 mm x 300mm) with 6 bars of 12
MM Fe500 steel. It is recommended to utilize M20 grade concrete for the structure (ratio
1 part Cement : 1.5 parts Sand : 3 parts Aggregate with 0.5 parts water by volume). It is
also suggested to utilize 8 MM stirrups at a span of 150 MM center to center all through
the length of column.
~~~~~~~~~~~~~~~~~~~~~~~
Published By
Pandu
www. qtoconstruction.com
~~~~~~~~~~~~~~~~~~~~~~~~