Quick methods for determining the weight of a steel bar (imperial units) (2024)

In our shops the need often arises to estimate the weight of steel, whether this is part of the bidding, to estimate how much steel may be needed for a given part length, or to decide how heavy the bar is in which we load. machines for safety reasons. Counting rods in a bundle and multiplying by weight per rod provides a quick "reality check" as to whether or not the weight of the tag is correct and how much weight is left in the rack.

Steel weighs 0.2833 pounds per cubic inch. To calculate the weight of a steel bar, we need to calculate its volume in cubic centimeters.

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To calculate the volume, we must first calculate the area in square centimeters of the section and then multiply it by the length.

Square or flat bar

To find the area of ​​a square or flat bar, multiply its width by its thickness. Then multiply that by the length (in inches) to calculate the volume, and then multiply the volume by 0.2833 pounds per square foot. cubic inches.

Example: 1 inch square steel bar with a length of 12 feet (144 inches).
1 inch × 1 inch × 144 inches = 144 cubic inches; times 0.2833 pounds per cubic inch = 40.97 pounds

Example: ½ inch × 2 inches flat, 10 feet (120 inches) long.
½ inch × 2 inches × 120 inches = 120 cubic inches; times 0.2833 pounds per cubic inch = 33.99 pounds

Ronde bar

To find the area of ​​a round bar, square the diameter and multiply by 0.7854. Multiply this by the length to calculate the volume.

Example: 1 inch round by 12 foot long steel bar.
1 inch × 1 inch × 0.7854 = 0.7854 square inch × 144 inches = 113.09 cubic inches; × 0.2833 pounds per cubic inch = 32.04 pounds per bar

Weight of bars remaining in a bundle: If there are 75.1-inch round bars 12 feet long in a bundle, the weight of the remaining steel is 75 bars times 32.04 pounds each. bar = 2,403 pounds

Example: ¾ inch round and 4 foot (48 inch) long steel bar.
0,750 inch x 0,750 inch x 0,7854 x 48 inch = 21,21 kubieke inch; × 0,2833 pond per kubieke inch = 6,00 pond

Hex-balk

To calculate the area of ​​a hexagon, first square the distance from flat to flat and then multiply it by 0.866. Then multiply by the length in inches to get the volume. Then multiply by 0.2833 pounds per cubic centimeter to get the kilograms.

Example: 1-inch hex steel bar, 12 feet (144 inches) long.
1 inch × 1 inch × 0,866 × 144 inch × 0,2833 pond per kubieke inch = 35,33 pond

Example 1.5-inch hex rod 3-inch long blank for chucker.
1,5 inch × 1,5 inch × 0,866 × 3 inch × 0,2833 pond per kubieke inch = 1,93 pond per