ASTM A36/A572GR50/A992 Wide Flange Beams W8X18 W8X21 W8X24

A36 structural steel h beam size comparison
W8X18: Section height is about 203mm, flange width is about 102mm, web thickness is about 6.4mm, and flange thickness is about 10.2mm.
W8X21: Section height is about 210mm, flange width is about 134mm, web thickness is about 6.4mm, and flange thickness is about 10.2mm.
W8X24: Section height is about 201mm, flange width is about 165mm, web thickness is about 6.2mm, and flange thickness is about 10.2mm.

A36 structural h beam theoretical weight comparison
W8X18: The theoretical weight per meter is about 18 pounds (about 8.16kg/m).
W8X21: The theoretical weight per meter is about 21 pounds (about 9.53kg/m).
W8X24: The theoretical weight per meter is about 24 pounds (about 10.89kg/m).

Comparison of mechanical properties of A36 h section beam
The materials of the three are all A36 h beam steel structure. A36 steel h beam is one of the most common low-carbon steels in the United States, with a tensile strength of 400 to 550MPa and a compressive strength of about 250MPa.

Due to the different cross-sectional sizes, the parameters such as the moment of inertia and section modulus of W8X24 h section steel are relatively large. When subjected to loads such as bending and shear, the bearing capacity is relatively stronger and the ability to resist deformation is also better. The bearing capacity of W8X18 h shaped steel is relatively weak, and W8X21 is between the two.

Comparison of application scenarios of A36 h beam structure
W8X18: Suitable for some occasions where the bearing capacity is not high, the space is limited, and the self-weight of the structure needs to be reduced, such as the secondary beams of some light buildings, the supporting structure of small equipment, etc.
W8X21: Commonly used for beams, columns and other components in general building structures, which can meet common building load requirements and achieve a good balance between economy and structural performance.
W8X24: More suitable for building structures with higher requirements for bearing capacity, such as the main load-bearing beams of large commercial buildings and industrial plants, and some bridge structures with strict requirements on structural stiffness.