The unit weight of steel (we also call it density) is approximately:

**78.5 kN/m3**

**7850 kg/m3**

**490 lbs/ft3**

**13231 lbs/yd3**

Skip to content
# Weight Calculation of Square Steel Bars (Solid + Hollow)

## Square Steel Bars

## Data Required for Steel Weight Calculation

## What is Unit Weight of Steel?

## What is Volume of Steel Bar?

## How to Calculate the Weight of Steel?

### Solid Square Steel Bar

#### What if the length of the bar is more or less than 1 m?

### Hollow Square Steel Bar

December 3, 2022

Weight Calculation of Square Steel Bars

Square steel bar, which has a grainy texture and radius level corners, is a very robust and adaptable building material. Carbon steel square bar stock is one of the most often used industrial and construction materials in the world due to its durability, adaptability, and affordability. Square steel bar exists in the form of various shape such as pipes and tubes.

Square steel bar

Hollow square bar

The material of square steel bars is usually mild steel with yield strength of 250 MPa.

Square tubes and square steel pipes are used for a variety of civil engineering projects, including the construction of buildings and the assembly of various types of machinery in factories. They are also used in the welding of various pieces of equipment.

In this topic, we look at the method for calculation of weight of square steel bars: both the solid and hollow steel bars.

To calculate the weight of steel, we need to things:

The unit weight

The volume of steel

The unit weight of a material is:

*the weight per unit volume of a material*.

The unit weight of steel (we also call it density) is approximately:

**78.5 kN/m3**

**7850 kg/m3**

**490 lbs/ft3**

**13231 lbs/yd3**

The volume equals:

**Area * length**

Since the bar is square, the area is (side)2

Steel weight calculation is done by with the help of steel weight formula.

The general formula is:

**Weight of square bar = Unit Weight (density) x Volume**

Calculate weight of a 50 mm square Steel bar with a length of 1 meter:

Square steel bars feature equal-length edges and square-shaped areas. If a steel square’s edge length is 50 mm on one side and all other sides are 50 mm, the steel bar is square and has an identical edge length on all sides.

Side length = 50 mm

Side length = 50 mm / 1000 = 0.05 m (converting from mm to m)

Cross-sectional area = (side length)2 = 0.05 * 0.05 = 0.0025 m2

**Weight of square bar = Unit Weight of steel x Volume**

Unit Weight of steel = 7850 kg/m3

The volume equals:

**Area * length**

Weight of square bar = 7850 * 0.0025 * 1 m =

**W = 19.625 kg/m**

This means that each 1 m of this square bar has a weight of 19.625 kg.

The weight will be equal to the weight/m * total length

If the length is 3.5 m,

The weight of the bar = 19.625 * 3.5 = **68.69** kg

What differs in this case is the volume; specifically the area will be changed.

Calculate weight of a 50 mm hollow square Steel bar with a length of 1 meter; the thickness is 10 mm:

Square steel bars feature equal-length edges and square-shaped areas. If a steel square’s edge length is 50 mm on one side and all other sides are 50 mm, the steel bar is square and has an identical edge length on all sides.

Side length = 50 mm

Side length = 50 mm / 1000 = 0.05 m (converting from mm to m)

Thickness = 10 mm = 0.01 m

**Cross-sectional area = (side length)2 – (side length – 2*thickness)2**

Cross-sectional area = 0.05 * 0.05 – (0.05 – 0.02) * (0.05 – 0.02) = 0.0016 m2

**Weight of square bar = Unit Weight of steel x Volume**

Weight of square bar = 7850 * 0.0016 * 1 m = 12.56 kg/m

*Weight Calculation of Square Steel Bars*

Read Also:

WEIGHT CALCULATION OF STEEL BARS (FORMULA AND EXAMPLES)

The post Weight Calculation of Square Steel Bars (Solid + Hollow) appeared first on Civil Engineering Forum.