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Rangka Atap Baja Ringan
STRUCTURE & PHYSICSintermediate
Definition
Light gauge steel roof frame — a structural system using cold-formed steel sections (U-channel and C-channel, typically 1.2–2.0 mm thick) for roof purlins, trusses, and bracing. Rangka atap baja ringan is faster to erect than timber, non-combustible, and allows open planning beneath roofs. It has become standard in Indonesian residential and commercial construction since the 1990s.
Example
A modern Indonesian house uses a rangka atap baja ringan composed of galvanised U-section purlins spanning between besi-hollow columns — the lightweight frame supporting genteng metal or galvalum roofing with minimal interior obstruction and minimal structural load on the walls below.