Four Categories. Every Project Covered.
Whether you are building a visible facade frame or a hidden roof truss, SRMB Realfabrica hollow sections are specified across these four application areas. Click through for detailed use cases.




Why Application Fit Matters as Much as Specification
Two hollow sections can share the same IS code and still perform differently on site if the shape, size, or grade does not suit the load pattern of the structure. A section chosen for a railing does not need the same thickness as one chosen for a roof truss, and a circular profile that resists torsion well in a staircase stringer is not automatically the right pick for a glass facade frame that needs flat, weldable faces.
SRMB Realfabrica manufactures all three structural shapes — square, rectangular, and circular — under one roof at SRMB Srijan's integrated steel plant in Durgapur, West Bengal. Because the hot rolled coil for every shape is rolled from our own billet under a Primary Steel Producer classification from the Joint Plant Committee, Ministry of Steel, the chemistry and mechanical properties stay consistent whichever shape a project calls for.
That consistency, checked batch by batch through our PAWS Technology framework (Physical uniformity, Accurate sizing, Weld quality, and Surface strength), is what lets architects, contractors, and engineers move between applications on the same project without switching suppliers or requalifying material.
Choosing the Right Shape for Your Application
This is a starting guide, not a substitute for a structural engineer's load calculation. For most applications, project teams use a combination of shapes on the same structure.
| If Your Project Needs | Shape Best Suited | Why |
|---|---|---|
| Even load resistance in every direction (columns, storage racks) | Square Hollow Section | Symmetrical profile carries axial load evenly, whichever direction it arrives from |
| Extra strength along one axis (beams, trusses, roof purlins) | Rectangular Hollow Section | Unequal sides give higher bending resistance along the longer axis |
| High torsional resistance or a curved, visible profile (railings, space frames, poles) | Circular Hollow Section | Closed round profile resists twisting and wind load, and welds cleanly for exposed work |
Why Project Teams Choose Us Across Every Application
Primary Steel Producer
Classified by the Joint Plant Committee, Ministry of Steel, meaning we roll our own billet into every application's hollow sections rather than buying finished coil externally.
One Supplier, Every Shape
Square, rectangular, and circular sections are all manufactured at the same integrated plant, so a project moving from structural framing to architectural railing does not need a second vendor.
IS Code Conformity
Across IS 1161, IS 4923, and IS 3601, so specification stays consistent whether the application is a factory shed or a stadium roof.
PAWS Technology QC
Physical uniformity, Accurate sizing, Weld quality, Surface strength — checked with digital Universal Testing Machines and spectrometers on every batch.
IMS Certification
Covering ISO 9001:2015 (Quality), ISO 14001:2015 (Environment), and ISO 45001:2018 (Occupational Health and Safety).
Traceable Product
Every length embossed with the SRMB brand mark and ISI logo specification number, so what is installed on site can be verified against what was ordered.
Common Questions About Hollow Section Applications
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