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Light Gauge Steel (LGS) construction (light steel framing) is a building construction system where all the structural building elements are prefabricated from galvanized steel. LGS is a typically thin sheet (generally 0.5mm to 1.5mm thick) of high-grade steel that is roll formed into various shapes and sizes for construction.
Roll forming produces light but very high tensile steel studs and the steel surface is galvanized (Zinc coated) to seal it from the corrosive action of its environment. These factors result in a material that is solid, rigid, strong, durable, and easier to build with. Studs are joined together to form frames, and joists that are used for walls or floors.
Roof truss framing can also be produced with this system and together with all other bracing components, a complete structure can be produced with this technology.
Height restrictions apply depending on the thickness and the form of the profiles of steel used. Electrical and plumbing considerations are essentially encompassed within the framework of the cladding.
| No. | Material of the wall from interior to exterior |
| 1 | double gypsum board |
| 2 | steel keel filled with foamed gypsum or rockwool |
| 3 | 12mm thickness OSB board |
| 4 | waterproof cloth |
| 5 | a few font keel filled with B level fire polyurethane |
| 6 | single white breathing paper |
| 7 | wood keel |
| 8 | outer decortative board |
| No. | Material of the roofing from interior to exterior |
| 1. | 12mm thickness OSB board |
| 2. | steel keel board filled with rockwool |
| 3. | waterproof cloth |
| 4. | a few font keel filled with B level fire polyurethane |
| 5. | single white breathing paper |
| 6. | counter battens |
| 7. | slate batten |
| 8. | tile |
