What is the minimum recommended size for a refuse chute?

The internal dimensions of the chute should not be less than 30 cm (Clause 4.3).

Is a ventilation pipe required for a refuse chute?

Yes, a vent pipe of at least 75 mm diameter must be installed, extending at least 1 m above the roof (Clause 4.5).

What are the requirements for the refuse collection chamber at the bottom?

It should have a minimum floor area of 5.5 m², a minimum height of 2.4 m, be well-ventilated, and have a floor sloping towards a drain (Clause 7).

What kind of finish is required for the internal surface of the chute?

The internal surface must be smooth, durable, non-corrosive, and impervious to provide a self-cleansing surface (Clause 5.1.1).

IS 6924

: 1973

Code of Practice for the Construction of Refuse Chutes in Multi storeyed Buildings

CurrentSpecializedCode of PracticeBIMMEP · Public Health Engineering

Download PDF BIS Portal Google

This standard provides guidelines for the design and construction of refuse chutes in multi-storey buildings to facilitate a hygienic and efficient method of refuse collection. It covers aspects like materials, dimensions, design of chutes, hoppers, ventilation, and collection chambers.

Code of Practice for the Construction of Refuse Chutes in Multi storeyed Buildings

Quick Reference Values

Minimum internal dimension of chute30 cm

Minimum diameter of vent pipe75 mm

Maximum size of hopper opening25 cm in any direction

Minimum floor area of collection chamber5.5 m²

Minimum height of collection chamber2.4 m

Slope of chute (if not vertical)not less than 45° to the horizontal

Practical Notes

Acoustic insulation is critical as noise from falling refuse can be a major issue for adjacent apartments or rooms. The chute should not be placed next to bedroom walls.

Proper fire separation is crucial. Hopper doors must be self-closing and fire-rated. Sprinklers are recommended at the top and bottom of the chute.

Regular cleaning and maintenance are essential to prevent blockages, odours, and pest infestation. A water connection at the top for flushing is highly recommended as per the code.