How To Calculate Steel Quantity Per Unit Weight

In the world of construction, accurate calculations play a crucial role in ensuring the success and efficiency of any project. When it comes to steel structures, determining the precise steel quantity is of utmost importance. In this article, we will provide you with a comprehensive guide on calculating steel quantity, equipping you with the knowledge and expertise needed to excel in the construction industry.

 Understanding Steel Quantity Calculation

 Step 1: Analyzing Structural Drawings

The first step in calculating steel quantity is to thoroughly analyze the structural drawings. These drawings contain vital information about the dimensions, shapes, and placement of steel elements within the structure. By carefully examining the drawings, we can identify the different steel members, such as beams, columns, and reinforcements, and gather the necessary data for accurate calculations.

    Step 2: Determining Steel Weight

To calculate the steel quantity, we need to determine the weight of each steel member. The weight of steel can vary based on factors like the type of steel used, its dimensions, and the specific design requirements. By referring to engineering handbooks and steel manufacturer catalogs, we can obtain the weight per unit length for various steel sections commonly used in construction.

 We can calculate also by the general formula below,

                                                Where , W - Weight Of Steel/Unit

                                                               D - Diameter Of Bar in mm i.e 6mm, 8mm ,10 mm

                                                               L - Length Of Bar in mm

    Step 3: Estimating Steel Lengths

Once we have the weight per unit length, we can estimate the total lengths of steel members required for the project. This involves multiplying the weight per unit length by the respective quantities specified in the structural drawings. By summing up the lengths of all steel members, we arrive at the total steel length required for the construction.

    Step 4: Factoring in Overlaps and Laps

Steel reinforcements often require overlaps and laps to provide the necessary strength and stability to the structure. It is crucial to include these additional lengths when calculating the steel quantity accurately. By accounting for overlaps and laps, we can ensure that the construction meets the required standards and maintains structural integrity.

 Consider the following example to understand better,

• Calculation the weight of steel per unit which has a length 12 meter and Dimeter of 32mm

So by the following formula,

    By Given Data :-

                                 D = 32 mm

                                 L = 12 meter

So adding values in above formula we get,

W = 32x32x12

       162

 

                                                                           =  75.851 Kg/unit