Sectional area of metal material and the theoretical calculation of the weight of the Summary
Steel cross-section area calculation formula
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Steel tape
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Sectional area (F) Formula
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Code Description
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Square steel
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F=a2
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ａSide length
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Round angle square steel
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F=a2-0.858 4r2
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a for the side length, r for the fillet radius
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Steel, flat steel, strip steel
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F=a×d
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a for the edge width, d is the thickness
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Rounded flat
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F=ad-0.858 4r2
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a for the edge width, d is the thickness, r is radius
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Round bar, round steel ，wire rods
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F=0.7854d2
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d for the diameter
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6 angle
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F=0.866a2=2.598s2
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a for-to-edge distance, s for the side length
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Octagonal Steel
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F=0.8284a2=4.828 4s2
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Steel Pipe
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F=3.1416d(D-d)
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D for the outer diameter, d for the thickness
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Equilateral angle steel
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F=d(2b-d)+0.2146(r2-2r12)
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d for the edge thickness, b for the edge width, r for the inner radius, r1 for the client side of fillet radius
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Scalene angle steel
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F=d(B+b-d)+0.2146(r2-2r12)
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d for the B side for a long thick edge width, b for the short side of width, r for the inner radius, r1 for the client side of fillet radius
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I-steel
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F=hd+2t(b-d)+0.58(r2-r12)
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h for the height, b for the leg width, d for thick waist, t for the average thick legs, r for the inner radius, r1 for edge radius
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Channel
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F=hd+2t(b-d)+0.34(r2-r12)
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Simple calculation of the theoretical weight of steel type
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Steel tape
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theoretical weight (W) calculation formula
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Round angle square steel
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W=0.00785×width×thick
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Square steel
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W = 0.00785 × side length of square
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Round steel, Wire rod, steel wire
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W = 0.00617 × the square of the diameter
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Hexagonal steel
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W = 0.0068 × square of the distance-to-edge
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Eight steel
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W = 0.0065 × square of the distance-to-edge
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Steel pipe
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W = 0.02466 × wall thickness × (OD - Wall Thickness)
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Equilateral angle steel
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W = 0.00785 × edge thickness × (2 times the width edge - edge thickness)
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Scalene angle steel
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W = 0.00785 × edge thick × (long-edge + short side width - edge thickness)
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I-steel
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W = 0.00785 × waist thick × [high + f (leg width - waist thick)]
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Channel
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W = 0.00785 × waist thick × [high + e (leg width - waist thick)]
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[Source：Original]
[Author：web]
[Date：09-02-06]
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