StructureCalcsISHB 450
Heavy-Weight Beam (ISHB) · IS 808 · India
ISHB 450 is an Indian heavy-weight beam 450.0 mm deep with a 250.0 mm wide flange, weighing 87.2 kg/m. The dimensions below are the published IS 808 values; the drawing is generated from them.
ISHB heavy beams double as columns in Indian practice — wider flanges than the ISMB series at similar depths.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 450.0 mm | 17.72 in |
| Flange width, bf | 250.0 mm | 9.84 in |
| Flange thickness, tf | 13.7 mm | 0.539 in |
| Web thickness, tw | 9.8 mm | 0.386 in |
| Mass per metre | 87.2 kg/m | 58.6 lb/ft |
| Area, A | 11,100 mm² | 17.21 in² |
| Second moment, Ix | 392,000,000 mm⁴ | 941.8 in⁴ |
| Second moment, Iy | 30,000,000 mm⁴ | 72.1 in⁴ |
Derived section properties
Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For ISHB 450 the computed area agrees with the published value to better than 0.01% and Ix to 0.08%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zex | 1,740,791 mm³ |
| Elastic modulus, Zey | 243,772 mm³ |
| Plastic modulus, Zpx | 1,952,653 mm³ |
| Plastic modulus, Zpy | 398,696 mm³ |
| Radius of gyration, rx | 187.8 mm |
| Radius of gyration, ry | 52.4 mm |
Ze is the elastic modulus and Zp the plastic modulus, following IS 800 notation.
Neighbouring sizes
Where these numbers come from
Published IS 808 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API