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Waste Disposal System in High Rise Buildings

Waste Disposal System in High Rise Buildings

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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. 
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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. 

CHUTE LOADING DOORS

  • 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.

    CHUTE DISCHARGE DOORS

    • 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.

    AUTOMATIC SPRINKLER PROTECTION

    • 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.
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    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.

    CONCLUSION

    • 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. 



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    Construction Detail of Chutes

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