This standard provides guidance on the construction of timber ceilings, including suspended and directly fixed types. It covers the selection of materials like timber and fasteners, design aspects such as joist spacing and support, construction methods for the framework and boarding, and finishing treatments.
Code of practice for construction of timber ceilings
Quick Reference Values
Maximum permissible moisture content in timber15%
Typical spacing of ceiling joists400 to 600 mm
Minimum thickness of timber boarding12 mm
Minimum end bearing for joists75 mm
Practical Notes
Ensure timber is properly seasoned as per IS 1141 to a moisture content below 15% to prevent future warping and shrinkage.
Pay close attention to the connection of hangers and framework to the primary roof or floor structure for safety and stability.
For aesthetic appeal, plan the board layout and jointing pattern before starting installation.