IS 4923 CertifiedIS 3601 CertifiedPrimary Steel ProducerIMS Certified

Architectural Applications of SRMB Realfabrica Hollow Sections

Architecture asks a structural section to do two jobs at once: carry load safely, and look right doing it. A hollow section used behind a glass facade, in an exposed staircase, or as a partition frame doesn't get hidden inside a wall the way a lot of structural steel does, so its finish, straightness, and dimensional accuracy matter just as much as its strength rating.

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IS 4923
SHS & RHS Standard
IS 3601
CHS Standard
3
Section Shapes
PAWS
Quality Technology
Why Specify

Why Architectural Projects Choose SRMB Realfabrica

Steelworkers tapping molten metal on the furnace floor
Primary Steel Producer
Classified by the Joint Plant Committee, Ministry of Steel — we produce the steel from iron ore, not just distribute it.
ISI certification mark
IS Code Certified
SHS & RHS to IS 4923, CHS to IS 3601, structural tube to IS 1161. Certified for structural and architectural use.
PAWS Technology — Physical property, Accurate length, Weld superior, Superior surface quality
PAWS Technology QC
Every batch tested on Digital UTM & Spectrometer — Physical, Accurate sizing, Weld quality, Surface checks.
Coil rolled into hollow sections, then inspected against a specification sheet
Product Traceable
Every length embossed with the SRMB brand mark and ISI logo — verifiable on site, every time.
Where It's Used

Architectural Applications

Hover over each application to see which section type, grade, and key considerations apply.

Glass curtain wall framed in square and rectangular hollow sectionsSHS · RHS
  • SHS & RHS for mullions and transoms — flat faces seat gaskets evenly
  • IS 4923 certified ±1% tolerance — consistent sightlines across full runs
  • Rectangular for vertical mullions; square for secondary transoms
  • Smooth black finish — ready for primer, paint, or powder coat
Glass Curtain Wall Frames
Hover
  • SHS & RHS for mullions and transoms — flat faces seat gaskets evenly
  • IS 4923 certified ±1% tolerance — consistent sightlines across full runs
  • Rectangular for vertical mullions; square for secondary transoms
  • Smooth black finish — ready for primer, paint, or powder coat
Interior partition framing built from hollow sectionsSHS · RHS
  • Flat faces allow glass, laminate, or plasterboard to fix directly
  • RHS for high-traffic corridors; SHS for lighter space-dividers
  • Consistent YST 210/240 grade — one mill certificate per order
  • Weld with MS electrodes, no preheating — keeps schedules on track
Partition Frames
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  • Flat faces allow glass, laminate, or plasterboard to fix directly
  • RHS for high-traffic corridors; SHS for lighter space-dividers
  • Consistent YST 210/240 grade — one mill certificate per order
  • Weld with MS electrodes, no preheating — keeps schedules on track
Triangulated space frame roof structure in hollow sectionsSHS · CHS
  • CHS resists multi-directional bending equally — ideal for node members
  • SHS for primary chord members — flat face simplifies node connections
  • Consistent wall thickness from CF ERW — critical for slender members
  • Bends and curves easily — enables sweeping atrium and canopy forms
Space Frames
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  • CHS resists multi-directional bending equally — ideal for node members
  • SHS for primary chord members — flat face simplifies node connections
  • Consistent wall thickness from CF ERW — critical for slender members
  • Bends and curves easily — enables sweeping atrium and canopy forms
Staircase and guard rail assembly in circular and square hollow sectionsCHS · SHS · RHS
  • CHS for handrails and posts — rounded profile, comfortable grip
  • SHS/RHS for stair stringers — flat faces simplify tread welding
  • IS 3601 grades WT 160 to WT 310 — match strength to the application
  • Seal cut ends with welded cap — prevents moisture ingress outdoors
Guard Rails & Staircases
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  • CHS for handrails and posts — rounded profile, comfortable grip
  • SHS/RHS for stair stringers — flat faces simplify tread welding
  • IS 3601 grades WT 160 to WT 310 — match strength to the application
  • Seal cut ends with welded cap — prevents moisture ingress outdoors

Shape Selection Guide

Architectural ApplicationRecommended ShapeTypical GradeWhy
Glass curtain wall framesSquare or Rectangular (IS 4923)YST 210 / YST 240Flat faces seat glazing gaskets and pressure plates evenly
Partition framesSquare or Rectangular (IS 4923)YST 210 / YST 240Flat faces suit direct cladding fixing; lightweight for repositioning
Space framesCircular, with Square for chords (IS 3601 / IS 4923)WT 160 to WT 310 / YST 210 / YST 240Circular resists multi-directional buckling at connecting nodes
Guard rails and staircasesCircular for rails, Square/Rectangular for stringersWT 160 to WT 310Rounded profile for grip and dent resistance on handrails

This table is a starting reference. Final shape, size, thickness, and grade should always be confirmed against your structural engineer's load calculation, and our technical team is available to help match a specification to your drawings.

Steelworkers tapping molten metal on the furnace floor at the SRMB plant

Why Choose SRMB Realfabrica for Architectural Projects

One supplier for every shape
SHS, RHS, and CHS manufactured at the same integrated plant in Durgapur.
Primary Steel Producer
Classified by the Joint Plant Committee — coil rolled from our own billet, not bought externally.
IS Code Conformity
SHS & RHS to IS 4923, CHS to IS 3601, structural tube to IS 1161.
PAWS Technology QC
Digital UTM & spectrometer testing every batch for dimensional accuracy.
IMS Certified
ISO 9001:2015 · ISO 14001:2015 · ISO 45001:2018.
Traceable on Site
Every length embossed with SRMB brand mark and ISI logo — verifiable at any point.

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Frequently Asked Questions

Square and rectangular hollow sections are generally preferred for glass curtain wall mullions and transoms, since their flat faces give glazing contractors a true, even surface to seat gaskets and pressure plates against along the full facade run.

Circular hollow section is the standard choice for guard rails and handrails, because its rounded profile is comfortable to grip and resists denting better than a flat faced section under repeated contact.

Yes. Square and rectangular hollow sections are widely used for partition framing, since their flat faces allow cladding materials like glass, laminate, or plasterboard to be fixed directly to the frame.

Circular hollow sections resist bending and buckling equally in every direction, which suits space frame members that carry load arriving from multiple, constantly shifting angles through a triangulated lattice.

Staircase stringers typically use square or rectangular hollow sections for their flat welding faces, while circular sections are used for handrails. Exact size depends on span and load, confirmed against a structural engineer's calculation.

Yes. Sections leave the plant with a smooth black finish and no oiling or varnishing, making them ready for site applied paint, powder coating, or polish typically specified for exposed architectural steel.

SRMB Realfabrica circular hollow sections are manufactured under IS 3601 across WT 160, WT 210, WT 240, and WT 310 tube designations, allowing fabricators to match strength grade to the specific railing application.

Yes, for anything exposed to weather. Sealing cut ends with a welded end cap keeps moisture out of the section over its service life and removes the sharp edge an open, unsealed end otherwise presents.

Yes. Because hollow sections resist bending moments well on both axes, they bend and curve more easily than open sections of similar weight, which supports the curved rooflines and facades common in modern architectural design.

Square and rectangular architectural hollow sections conform to IS 4923, circular sections conform to IS 3601, and general structural tube also references IS 1161.

Yes. The same IS certified, Primary Steel Producer manufactured sections are used for hidden structural framing and exposed architectural work, with shape and finish selected to suit whichever application applies.

Choose square or rectangular sections where flat mounting faces are needed, such as glazing or cladding fixing, and circular sections where a rounded, gripable, or multi-directional load bearing profile is needed, such as railings or space frames.

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