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Garbage Disposal System in High Rise Buildings

Introduction:-

Arrangements for central trash collection by means of an enclosed vertical passageway in a building, used for transferring trash by gravity to a room at the bottom or to a compactor is called GRAVITY WASTE CHUTE.
Metal Gravity Waste chutes are a minimum of 24” diameter and can be made of stainless steel, galvanized steel, or Aluminium-coated steel.

Garbage Chute

The interior surface of the chute should be preferably smooth free from projections.
The chute also needs to be vented at the top with the opening preferably being the same cross-sectional area as the chute.
Vertical waste chutes above the storage or compacting room shall be enclosed within a continuous fire-rated enclosure.
The walls of the enclosure shall have a fire-resistance rating of not less than 2 hours if the building is more than four stories and 1 hour if the building is less than four stories.
Each section is insulated to reduce noise.

All Chute loading doors shall be provided with a self-closing and fire-resistant door of rating not less than an hour.
Design and installation shall be such that no part of the frame or door projects in the interior of the chute.
Chute loading doors shall be provided exclusively in rooms designed for accessing the chutes and shall be protected by:

– Enclosing the area with fire barrier without windows that has a 1-hour fire-resistance rating

– Protecting the area with an automatic fire extinguishing system.

The bottom of a waste chute shall be protected by an approved automatic/self-closing door with an adequate fire-resistance rating of 1-1.5 hours
The Waste chute shall terminate or discharge directly into a room having a minimum fire-resistance rating not less than that for the chute.
Openings of the chutes in the room should be through appropriately designed chute discharge doors.
Trash gravity chutes should not discharge directly into an incinerator.

The Metal gravity chutes are required to be protected internally by automatic sprinklers.
Sprinkler shall be installed at regular intervals at alternate floor levels for more than two-storied buildings with a mandatory sprinkler fitted at the lowest level.

AUTOMATIC SPRINKLER PROTECTION

Sprinklers should be recessed out of the chute area through which the material travels.
Sprinklers are also to be installed in the chute discharge room.
Sprinklers may be directly loaded through the domestic water supply line.

Proper construction and maintenance of chutes and discharge rooms provide improved protection to building tenants from the effects of smoke and fire.
It also acts as a fire buffer in helping prevent fire to spread.
It needs regular cleaning and inspection to be in peak operating condition.

Construction Detail of Chutes