Maximum Spacing Between columns

 

SIZE OF COLUMN BEAM

Column

NBC 105:2077

Requirements of this section shall apply to columns resisting earthquake-induced effects, in which the factored axial compressive stress due to gravity and earthquake effects exceeds 0.08fck.

•  The minimum dimension of a column shall not be less than 20 db, where db is diameter of the largest diameter of longitudinal reinforcement bar in the beam passing through or anchoring into the column at the joint.
• The minimum dimension of column shall be 300 mm.
•  Columns shall preferably have width-to-depth ratio of more than 0.45.

 

 

                                      Fig: Requirement for minimum size of column member

IS 13920:1993

These requirements apply to frame members which have a factored axial stress in excess of 0.1 fck under the effect of earthquake forces. 

• The minimum dimension of the member shall not be less than 200 mm. However, in frames which have beams with centre to centre span exceeding 5 m or columns of unsupported length exceeding 4 m, the shortest dimension of the column shall not be less than 300 mm.
• The ratio of the shortest cross sectional dimension to the perpendicular dimension shall preferably not be less than 0.4.

Beams

NBC 105:2077

Requirements of this section shall apply to beams resisting earthquake-induced effects, in which the factored axial compressive stress does not exceed 0.08fck. Beams,

•  Beams shall preferably have width-to-depth ratio of more than 0.3
• Beams shall not have width less than 200 mm
•  Beams shall not have depth D more than 1/4th of clear span.
•  Width of beam bw shall not exceed the width of supporting member

 

IS 13920:1993

These requirements apply to frame members resisting earthquake induced forces and designed to resist flexure. These members shall satisfy the following requirements.

• The factored axial stress on the member under earthquake loading shall not exceed 0.1 fck.
• The member shall preferably have a width-to-depth ratio of more than 0.3.
• The width of the member shall not be less than 200 mm.
•    The depth D of the member shall preferably be not more than l/4 of the clear span.

MAXIMUM DISTANCE BETWEEN TWO COLUMN IN THE BUILDING

Column: A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member.

There are no any particular rule for determining the spacing between the two columns. It all depends upon the type of structure and Architecture and Structural Engineer’s considerations. Architecture are always consider larger spacing in building to be used for different purpose while structure engineer  are to be always try to make the structure safe economy and ensure the integrity of the structure and prefer the grid system of column.

 

There are 2 major factor for determining the spacing of column

•        Type of structure

In general residential building there are no heavy load in the structure so the distance between column may be increases considering structural safety while increasing the distance between two column the size of column and depth of beam also increased it may lead the increase the cost of structure.

Generally 3-4m in ordinary building and in large building it may be up to 6-9m column spacing are used. Maximum 5m to 7.5 m and minimum 2.5m kept the distance between the two columns.

• .       Architecture and structure engineer consideration

Architecture are always consider larger spacing in building to be used for different purpose while structure engineer  are to be always try to make the structure safe economy and ensure the integrity of the structure and prefer the grid system of column