IS 7215:1974 is the Indian Standard (BIS) for structural use of cold-formed light gauge steel members. This code specifies the requirements for the structural design of members cold-formed from light gauge steel. It is based on the Allowable Stress Design (ASD) philosophy and introduces the critical concept of 'effective width' to account for local buckling in thin-walled sections.
Provides guidelines for the design and construction of structures using cold-formed light gauge steel members.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Design Philosophy | Allowable Stress Design (ASD) | Limit State Design (LSD/LRFD) is primary; ASD is provided as an alternative. | AISI S100-16 |
| Permissible Bending Stress (Tension/Compression) | 0.60 * fy (where fy is yield stress) | Design strength (φb * Mn) must exceed required factored moment (Mu). φb is typically 0.90-0.95. | AISI S100-16 |
| Factor of Safety (Bending, against yielding) | 1.67 (implied as 1 / 0.60) | Not directly comparable; uses a resistance factor (φb) of 0.90 for bending in LRFD. | AISI S100-16 |
| Permissible Average Shear Stress (Web) | 0.40 * fy (for h/t ≤ 547/√fy) | Nominal shear strength (Vn) is calculated based on shear buckling equations; it is not a simple stress limit. | AISI S100-16 |
| Distortional Buckling Check | Not required / Not covered. | Mandatory check for flanged sections with edge stiffeners. | AISI S100-16 |
| Typical Material Yield Strength | 250 MPa (based on IS 1079) | 345 MPa (50 ksi) and 380 MPa (55 ksi) are commonly used. | AISI S100-16 |
| Design of Connections | Provides basic provisions for welded and bolted connections. | Provides extensive, research-based provisions for screws, bolts, welds, and other fasteners, including pullover and pullout checks. | AISI S100-16 |