Are the general material tests for fire-clay included in this part?

No, general requirements such as glazing quality, water absorption, and crazing are covered in IS 771 (Part 1).

What is the acceptable dimensional tolerance for these trays?

Generally, ±4 percent is allowed for dimensions 100 mm and above.

What differentiates fire-clay from vitreous china?

Fire-clay is thicker, stronger, and typically used for larger, heavier sanitary wares compared to vitreous china, though it has slightly higher water absorption.

IS 771

: 2000

Glazed Fire-clay Sanitary Appliances, Part V: Specific Requirements of Shower Trays

CurrentSpecializedSpecificationBIMMEP · Sanitary Appliances and Water Fittings

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This standard specifies the dimensions, manufacturing requirements, and tolerances specifically for glazed fire-clay shower trays. It is utilized by architects and MEP engineers for specifying heavy-duty sanitary appliances in building construction.

Glazed Fire-clay Sanitary Appliances, Part V: Specific Requirements of Shower Trays

Quick Reference Values

Tolerance on dimensions 100 mm and above±4 percent

Minimum thickness of fire-clay appliance12 mm

Typical waste hole diameter65 mm

Practical Notes

Glazed fire-clay shower trays are significantly heavier than modern acrylic or fiberglass equivalents; ensure adequate floor structural support.

Always coordinate the shower tray's specified waste hole diameter with the plumbing trap and drainage layout early in the design phase.

General material testing requirements like water absorption and crazing are not in this part, but refer back to IS 771 Part 1.