IS 1893 roofing structural standards

The Flexible Diaphragm: Seismic Shear Resistance and Lateral Load Distribution in Timber and Steel-Framed Shingle Roofs

• September 21, 2026
• admin

In structural earthquake engineering, the roof is not merely an overhead weather shield—it acts as the uppermost horizontal structural diaphragm of the building. When tectonic ground motions occur, an earthquake does not shake the roof directly. Instead, seismic accelerations travel upward through foundation footings, reinforced concrete columns, and shear walls. The inertia of the roof …