Key Project Terms: Temporary Chutes (Construction Equipment)

The following is a list of useful terms to use when researching additional Temporary Construction Chute information on each of the topics discussed:


A solid barrier shall extend from ground level to the deck of the overhead protection where a chute is located. This can be plexiglass for the top half.

Bumper or Curb

A bumper or curb at least 4”x 4” (102 by 102 mm) in section is required at each chute opening that is level with, or below, the floor or platform.

Cable or Chain Assembly

Chute sections may be equipped with an approved adjustable assembly used to link one section to the next. This assembly is the vital component of a chute, each supporting the weight of sections beneath it, the uppermost pairs supporting more weight than cable or chain assemblies lower on the chute.

Debris Container

This can be a dumpster, a hopper, a skip or an open top waste removal truck.

Door Section

An entry point for debris, openings shall not exceed 48 inches in height, measured along the wall of the chute. Openings shall be closed and secured when not in use and are only permitted on chutes angled more than 45 degrees.

Dust Management

Dust producing operations shall be wetted down to the extent necessary to control dust per NYC BC 3306.9.3, the DEP Air Pollution Control Code, and LL 38/15.


A project including a construction chute may involve the temporary encroachment onto roadways, sidewalks, curbs or utilities.

Gates (upper, lower and intermediate)

A gate shall be provided at the lower end of every chute to control the loading of material into trucks and to close the chute at all other times.

Impact Plate

Chutes shall be provided with a metal impact plate or other manufacturer approved reinforcement, for locations where material changes direction while falling.

Regular Section

A chute typically consists of telescoping tubular sections, where the upper section fits into the top of the next lower section to avoid potential snags and blockage.

Safety Signage

In areas where danger to the public exists, including the discharge ends of chutes, descriptive warning signs are required, per NYC BC 3307.4.2 and DOT.


Splashboards or baffles are required to prevent materials from rebounding into public areas.


Where a Site Safety Plan is needed for a major building, the staging of chute locations during construction and an approval letter from the RDP must be documented and kept on site.

Structural Supports

Structural Supports must be rigid and noncombustible to prevent extensive horizontal movement. This includes outriggers, winches, chains and/or cables.

Top Hopper Section

The top hopper is the uppermost section of a chute and is an entry point for debris. Typically, the hopper is scoop shaped to help channel debris into the chute.

Key Points & Project Terms Categories

  1. Alterations

  2. Building Systems Installation & Modifications

  3. Construction Equipment

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