IS 10505

: 1983

Code of practice for construction of floors and roofs using precast concrete waffle units

CurrentSpecializedCode of PracticeBIMStructural Engineering · Planning, Housing and Pre-fabricated Construction
Download PDFBIS PortalGoogle

This code provides guidelines for the design, manufacture, and construction of floors and roofs using precast concrete waffle units. It covers materials, dimensions, design considerations for composite action, manufacturing processes like moulding and curing, and on-site erection procedures.

Code of practice for construction of floors and roofs using precast concrete waffle units

Quick Reference Values
Minimum grade of concrete for precast unitsM15
Minimum grade of concrete for in-situ structural concreteM15
Minimum thickness of structural in-situ topping30 mm
Standard width of the rib of waffle unit75 mm
Typical standard overall depth of waffle units100, 125, 150, 175, 200 mm
Permissible tolerance in length of waffle unit± 6 mm
Permissible tolerance in overall depth of waffle unit± 3 mm
Practical Notes
Strict adherence to dimensional tolerances in Table 1 is critical for proper fit-up during erection.
Ensure proper surface preparation of precast units before placing in-situ concrete to achieve monolithic composite action.
Careful handling and stacking of the precast units are essential to avoid damage before installation.