BS 8290-2:1991

Committees responsible
Foreword
Specification
Section 1. General
1 Scope
2 Definitions
3 Product information and marking
Section 2. Structural members and grids
4 Material
5 Tolerances
6 Protective finishes
7 Structural performance
Section 3. Infill units
8 Materials
9 Tolerances
Appendices
A Method of measurement of structural performance of
   supporting grid
B Method of measurement of dimensional accuracy,
   squareness and flatness of ceiling infill units
Tables
1 Steel sections: maximum permitted tolerances
2 Maximum deflection of structural components
3 Infill units: maximum permitted tolerances from
   manufacturer's stated dimensions
4 Mineral fibre infill units: maximum permitted
   tolerances from manufacturer's state dimensions
5 Permissible deviations from flatness for steel tiles
   and panels formed by means other than pressing
6 Permissible deviations from flatness for steel and
   aluminium linear strip infill units
Figures
1 Section squareness
2 Mineral fibre infill units: edge details
3 Frame for structural performance test

Specifies materials, tolerances and requirements for performance of components and complete assemblies of dry construction ceilings with suspension systems of lightweight steel or aluminium alloy sections and specified infill units. Gives method of measurement of dimensional accuracy, squareness and flatness of ceiling infill units; also method of measurement of structural performance of supporting grid.