Why Standard Sizes Matter
Standard size H-beams and I-beams allow engineers to select sections directly from published tables of dimensions, mass and section properties. Standardization speeds up design, keeps fabrication simple, and makes procurement reliable because every size has a defined weight per meter and a stable supply base.
H-Beam and I-Beam Profiles
H-beams have wide parallel flanges and suit columns and beams where stiffness in two directions is needed. I-beams have narrower tapered flanges and are economical for beams spanning between supports. Both profiles are available in standard carbon steel sizes for building work.
Material Grades
ASTM A36 is the general structural carbon steel for welded, bolted and riveted construction, with a minimum yield strength of 250 MPa in the standard thickness range. Q235B to GB/T 700 offers equivalent strength with the quality level B for impact performance, and both grades are readily weldable.
Standard Size Range
Standard sections range from light beams around 100 mm in height to heavy columns above 400 mm, covering the sizes used in most building frames. Each size is supplied with the theoretical mass per meter, and lengths are typically 6 m, 9 m or 12 m with cutting available.
Applications in Building
Columns and beams of steel-framed buildings.
Portal frames, roof trusses and mezzanine floors.
Industrial workshops, warehouses and logistics centers.
Platforms, gantries and equipment supports.
Frequently Asked Questions
Q: What is the advantage of standard size beams?
Standard sizes are defined in published tables, which simplifies design, fabrication and ordering and keeps delivery reliable.
Q: What is the difference between A36 and Q235B?
Both are general structural carbon steels with similar strength; A36 follows ASTM A36 while Q235B follows GB/T 700.
Q: Which lengths are available?
Standard lengths are 6 m, 9 m and 12 m, and custom lengths can be cut to the project schedule.
Q: Can the beams be galvanized?
Yes, hot-dip galvanizing is available for outdoor and corrosive environments.
Q: Are test certificates provided?
Yes, mill test certificates with chemical composition and mechanical properties are supplied with each order.