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Structural Steel Shapes are usually ordered as specification ASTM-A36.

This Standard of the American Society for Testing and Materials is issued under the designation A-36.

All size available as hot dipped galvanized

Conforms to A-992, A-36 and A-572-GR50.
Standard lengths 40', 50', 60'
Unit of Measure

Specifications

Material

Steel

Shapeform

Flange Beams

Nominal Size

21 x 12 1/4 inches

Working Decimal Equivalent

21.000 x 12.25 inches533.4 x 311.15 mm

Weight lbs/ft

111 lbs/ft165.186204 kg/m

Depth of Section - A

21.51 inches546.354 mm

Flange Width - B

12.340 inches313.436 mm

Average Flange Thickness - C

0.875 inches22.225 mm

Web Thickness - D

0.550 inches13.97 mm

Weight per 40 ft. Length

4440 lbs2011.32 kg

Weight per 50 ft. Length

5550 lbs2514.15 kg

Weight per 60 ft. Length

6660 lbs3016.98 kg

Standard Length

40 ft50 ft60 ft

Typical Mechanical Properties

Tensile Strength

56000 to 80000 psi

Min. Yield Strength

50000 psi

Max. Carbon Content

0.26

ASTM Specification

ASTM A-36 ASTM A-572