Steel column size for 2 storey, 3 storey & multistorey building. The size of steel columns for a building can vary significantly depending on several factors, including the design loads, building code requirements, and structural engineering calculations. Here are some general guidelines for typical building scenarios:

1. Two-Storey Building: For a two-storey building, the size of steel columns is typically determined by the structural engineering calculation based on factors such as the type of loads (dead loads, live loads, wind loads, etc.), building dimensions, and materials used. Common column sizes may range from 6×6 inches to 10×10 inches or larger, but it ultimately depends on the specific project’s requirements.

2. Three-Storey Building: In a three-storey building, the size of steel columns may need to be larger to support the additional height and potential loads. Typical sizes could range from 8×8 inches to 12×12 inches or more, again depending on engineering calculations and local building codes.

3. Multistorey Building: For multistorey buildings, the column size becomes even more critical due to the increased height and load-bearing requirements. The size of steel columns in a multistorey building can vary significantly and may range from 10×10 inches to 24×24 inches or larger, depending on factors like building design, location, seismic considerations, and more.

There is different shape and size of hot rolled Steel section such as H beam (universal column), I beam (universal beam), angles, channels and etc are used in construction project such as field of agriculture construction, industrial construction, multi storey building, different factories and residential project such as 2 storey, 3 storey and 5 storey building. Today is the demand of steel structure in the field of construction projects that replace the depending on reinforced cement concrete, their higher strength, less time consuming, make it ideal for residential project in short duration.

Universal column are also known as Steel column or UC’s or H beam due to their shape. Steel columns are very versatile and can be used in various structural Steel construction project. It is consist of two horizontal plates known as flanges connected by vertical component known as web. Generally depth of Universal column is equal as their width which makes them suitable for column application where strength needs to be similar in both of direction. Which is the most often used section for structural Steel purpose.

Steel column also known as Lintel, Girders, RSJ beam, Rolled steel sections, H beam, H- iron, W beam, steel column and UC’s. It is essential for any major support or structural integrity in building construction. Typical Universal column have less depth than universal beam, making them ideal for use in residential projects, agricultural and Industrial and other projects where height is limited.

Steel column or universal column are extremely effective for use as structural Steel. they provide the maximum amount of strength for the volume of Steel used in making them the most efficient method of carrying bending and shear loads. In this artical you know about Steel column size for 2 storey, 3 storey & multistorey building according to Thumb Rule and experience basis.

Steel column size depend on various factors, how high is the column?, what is the dead and live load, grade of Steel used, span between the two column, size of beam and others factors. Generally 150UC (6×6), 200UC (8×8), 250UC (10×10), 300UC (12×12), 350UC (14×14) and 400UC (16×16) steel column are used in construction industries. Generally Steel column size represented as depth × wide × weight per unit length, measured in mm or inch such as size of steel column 150UC represented as 152 × 152 × 23 or 6″×6″, where 152mm is depth of steel column, 152mm is their width and 23 represent weight per unit length or kg/m.

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**Steel column size for 2 storey, 3 storey & multistorey building**

A steel column size depending on the area of floor it is supporting, this area is calculated by dividing the distance between the column and all the adjacent column. And also this area is added from floor to floor for multi-storey. A 150UC or 6″×6″ size steel column can support 750 sq ft or 70 square meter of area and span upto 8m or 25 feet. A 200UC or 8″×8″ size steel column can support 3000 sq ft or 280 square meter of area and span upto 16m or 50 feet. A 300UC or 12″×12″ size steel column can support 6000 sq ft or 555 square meter of area and span upto 20m or 75 feet for light load structure. Each additional 2 inches can add 1500 square feet of supported area. A 350UC or 14″×14″ size steel column can support 7500 sq ft or 700 square meter of area and span upto 25m or 85 feet for light load structure. A 400UC or 16″×16″ size steel column can support 9000 sq ft or 840 square meter of area and span upto 30m or 100 feet for light load structure.

For example, a two storey building made of for steel column which are equal distance of 25′ × 25′ bays. The column at the centre of plan can support an area 25′ × 25′ × 2 storey = 1250 sq ft or 116 m2, so a 200UC or 8″×8″ steel column would be large enough.

**Steel Column size for 1 storey (G+0) building**

For this general thumb rule, we will assume a structure of G+0/ 1 storey residential building, using standard walls, on light load condition, size of a steel column or universal column or H beam or UC’s or H- iron or rolled steel section should be 150UC or 6″×6″, which can support 750 sq ft or 70 square meter of area and span upto 8m or 25 feet.

**Steel Column size for 2 storey (G+1) building**

For this general thumb rule, we will assume a structure of G+1/ 2 storey residential building, using standard walls, on light load condition, size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section should be 200UC or 8″×8″, which can support 3000 sq ft or 280 square meter of area and span upto 16m or 50 feet.

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**Steel Column size for 3 storey (G+2) building**

For this general thumb rule, we will assume a structure of G+2/ 3 storey residential building, using standard walls, on light load condition, size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section should should be 200UC or 8″×8″, which can support 3000 sq ft or 280 square meter of area and span upto 16m or 50 feet. Thus a steel column size 200UC or 8″×8″ is ideal for 1 storey, 2 storey and 3 storey building on light load condition that coverying upto 3000 sq ft or 280 m2 area and which can span upto 16m or 50 feet.

For this general thumb rule, using standard walls, on light load condition, A 250UC or 10″×10″ size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section are used upto 4/ (G+3) and 5/ (G+4) storey building which can support 4500 sq ft or 420 square meter of area and span upto 20m or 65 feet for light load structure.

For this general thumb rule, using standard walls, on light load condition, A 300UC or 12″×12″ size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section are used upto 6/ (G+5), 7/ (G+6) and 8/ (G+7) multistorey building which can support 6000 sq ft or 555 square meter of area and span upto 20m or 75 feet for light load structure.

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For this general thumb rule, using standard walls, on light load condition, A 350UC or 14″×14″ size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section are used upto 9/ (G+8), 10/ (G+9) and 11/ (G+10) multi storey building which can support 7500 sq ft or 700 square meter of area and span upto 25m or 85 feet for light load structure.

For this general thumb rule, using standard walls, on light load condition, A 400UC or 16″×16″ size of a steel column or universal column or H beam or UC’s or H-iron or rolled steel section are used upto 12/ (G+11), 13/ (G+12), 14/ (G+13) and 15/ (G+14) multi storey building which can support 9000 sq ft or 840 square meter of area and span upto 30m or 100 feet for light load structure.

**Disclaimer**: All the given Steel column size are based on thumb rule and it can be used for general knowledge purpose, do not use it for professional because actual size of steel column based on steel design structure.