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

101 lbs/ft150.304564 kg/m

Depth of Section - A

21.36 inches542.544 mm

Flange Width - B

12.290 inches312.166 mm

Average Flange Thickness - C

0.800 inches20.32 mm

Web Thickness - D

0.500 inches12.7 mm

Weight per 40 ft. Length

4040 lbs1830.12 kg

Weight per 50 ft. Length

5050 lbs2287.65 kg

Weight per 60 ft. Length

6060 lbs2745.18 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