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Trash, Recycling, & Linen Chutes: Components and Installation

CHUTES International4400 Austin LaneWhite Plains, MD 20695Tel: 301-753-4100Fax: 301-753-4108Toll-Free: 800-88-CHUTEEmail: [email protected]: www.chutes.com

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Trash, Recycling, & Linen Chutes: Components and Installation

CHUTES International4400 Austin LaneWhite Plains, MD 20695

Provides an overview of trash, recycling, and linen chutes and includes discussions on system components, accessory components, compactors and sorters, and meeting NFPA 82 codes. The program also guides you through a typical installation of a chute system.

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Purpose and Learning Objectives

Purpose: Provides an overview of trash, recycling, and linen chutes and includes discussions on system components, accessory components, compactors and sorters, and meeting NFPA 82 codes. The program also guides you through a typical installation of a chute system.

Learning Objectives:

At the end of this program, participants will be able to:

• identify the various components that comprise a chute system and describe how trash, recycling, and linen chute systems differ

• explain the ways in which chute systems must comply with NFPA 82 codes

• describe the steps involved in the installation of a typical trash, recycling, or linen chute, and

• discuss the types of optional accessory components available for trash, recycling, or linen chutes and their installation.






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Table of Contents

Trash, Recycling, & Linen Chute Components 7

Optional Accessory Components 18

Recycling & Compaction 25

Chute Installation 32

Installation of Accessory Components 47

FAQs 57

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Trash, Recycling, & Linen Chute Components






Intake Door: Trash & Recycling – Public Access

There are several types of intake doors, bottom hinged (hydraulic and pneumatic), with or without interlock. The standard 15" X 18" bottom hinged, hopper style door is mandated for public access trash chutes. When opened, the bottom hinged door allows for easy disposal of waste into the chute, while eliminating unnecessary spillage and overflow of litter onto the floor.

Where necessary, handicap accessible ADA push button, pneumatic, bottom hinged, hopper styledoors for typical trash chutes are available options for easy disposal of waste into the chute—allowing for ease of trash disposal without the need to manually open the door for waste disposal.

Interlock features allow for safe operation of the chute system by locking out all remaining intake doors when one door is in operation, protecting persons using the trash disposal system from falling debris from intakes above.






Intake Door: Linen Chute – Restricted Access

A standard 18" X 18" side hinged door is the industry standard for linen chutes and provides a greater accessible area to deposit bundles of soiled linen.

Intake Doors: Trash, Recycling and LinenBoth bottom hinged doors and side hinged doors are self-closing, noiseless, and self-latching. Both doors are UL labeled: a chute frame and door assembly with a 1½-hour fire rating and a temperature rise of 250°F maximum in 30 minutes.

MaintenanceThe only maintenance required for the intake doors is to keep them clean and free from structural damage that may be caused by misuse, carelessness, or vandalism, and to clean and lubricate door hinges. Pneumatic doors should never be wedged in the open position—this will cause the door to malfunction and operate improperly.






Duo & Trio Recycling Chutes

The duo or trio recycling chute should be made of minimum 16-gauge aluminized steel or stainless steel. The sections are factory assembled with all seams fully welded.

The 2- or 3-partitioned opening allows the user to directly deposit debris into the appropriate opening.

In a duo chute, there are two partitions, one for recycling and one for trash; in a trio chute, there are three partitions, two for recycling and one for trash.

Like with the regular trash chute, doors are UL labeled, hand operated, self-closing, self-latching, noiseless, bottom hinged, and all stainless steel. (May vary by manufacturer.)

Recycling Side

Trash Side






Vent

The purpose of a vent is to dissipate odors and hot gases in the event of a fire within the chute.

NFPA 82 codes require a full diameter vent, penetrating and extending 3' above the roof. The example to the right is a full diameter vent that comes complete with roof flashing, riser, and metal safety cap, and is of 12-gauge aluminum to better resist the external elements.






Discharge: Accordion Damper Type AC

The accordion discharge is recommended for use on trash and recycling chutes. The discharge is a UL labeled fire damper, held open by a 165°F fusible link and equipped with tension coils on either side of the damper to permit closing if the link melts. Monthly inspections of the discharge should be made to ensure that the links are intact and that no waste has collected in the horizontal tracks, which might interfere with its closing path.

Add drawing of AC Damper






Discharge: Rolling Incline Type A

The discharge door is held open by a 165°F fusible link. The door will roll shut if the link is melted. Monthly inspections of the discharge should be made to ensure that the link is intact and that no waste has collected in the horizontal tracks of the discharge, which might interfere with its rolling path.






Discharge: Hopper Type H

The hopper type discharge is UL labeled and used on linen chutes when a cart or bin is used as a receptacle, and the chute is passing through a wall. The discharge is top hinged and held open by chains with a 165°F fusible link. The hopper type discharge can also extend into the discharge room from the ceiling and is supported on a pedestal(s). The hopper discharge should be kept clean and free of damage caused from service impact and shall remain open at all times. It is not intended to be used as a shut-off door when carts are changed, etc.






Sprinkler System

As per NFPA 82, automatic sprinklers at the top intake, at alternate floor levels, and the bottom intake for trash, recycling, and linen chutes, are required. These heads are normally installed in the top corner of the intake throat to protect them from falling material. They are protected behind a sprinkler guard to prevent water from spraying out of the intake door and to prevent material that is charged into the throat from contacting the head.

These automatic sprinkler heads fuse at 165°F to open up and flood the chute. The automatic sprinkler heads furnished with the chute should be piped in accordance with NFPA standards. When the material handled by the chute is highly volatile, additional sprinkler heads should be installed at every floor level.






Flushing Spray Head

Most chutes are flushed periodically. A flushing spray head is furnished at the top of each chute as standard equipment. When supplied with water, the head radiates a flow of water to the inner chute wall. The water will tend to channel when first started, but will spread out. How often and how long the chute should be flushed depends upon many variables such as chute usage, size, condition, water temperature, and pressure. Flushing spray heads are used to remove lint from linen chutes to help eliminate fire hazards.






Trash & Recycling vs. Linen Chutes

Trash & Recycling Chute Linen ChuteChute Section Typical trash chute section for centralized

handling of general household or office waste. All materials are factory assembled with all seams fully welded and are prefabricated to shop drawing specifications. Expansion joints are provided permitting light variations in heights. Chutes should be a minimum of 16-gauge impact and corrosion resistant aluminized steel. Stainless steel is an option.

Standard linen chute section for centralized handling of soiled linens. All materials are factory assembled with all seams fully welded and prefabricated to shop drawing specifications. Expansion joints are provided permitting slight variations in heights. Chutes should be a minimum of standard 16-gauge impact and corrosion resistant aluminized steel. Stainless steel is an option.

Chute Door Standard hand operated intake, noiseless, self-closing, self-latching, UL labeled, bottom hinged, 1½-hour, 250°F temperature rise. Entire door (front, back, panels and skirt) of stainless steel finish with ADA compliant lever handle with lock and keys.

Standard hand operated intake, noiseless, self-closing, self-latching, UL labeled, side hinged, 1½-hour, 250°F temperature rise. Entire door (front, back, panels and skirt) of stainless steel finish with ADA compliant lever handle with lock and keys.

Chute Discharge Door

An accordion fire damper spring loaded discharge is held open by a 165°F fusible link assembly. This door is intended to provide smoke and fire protection to the chute riser and is not designed to perform as a shut-off gate.

For built-in wall discharge, a hopper type, self-closing, top hinged, hopper door is furnished with 165°F fusible link. A drain is provided with this type of door.

Chute Vent Top Full diameter vent of same gauge as chute extending minimum of 3' (per NFPA 82) above roof with metal safety cap.

Full diameter vent of same gauge as chute extending minimum of 3' (per NFPA 82) above roof with metal safety cap.






Optional Accessory Components






Disinfecting & Sanitizing Unit (D&S Unit)

A disinfecting and sanitizing unit is sometimes requested for trash, linen, and/or recycling chutes to control odor and bacteria. A unit such as this is generally composed of a reservoir tank and a proportioning valve and is located above the top intake of a chute. It injects a disinfecting solution into the water flow from the flushing spray head system.






Access Door

The access door, located above the top intake of the chute, allows access to the valves that operate the flushing spray head and/or sanitizing unit. A typical access door is 15" X 15", side hinged, constructed of stainless steel panels both front and back, self-closing, and self-latching, and must be labeled for a UL 1½-hour fire rating and a maximum temperature rise of 250ºF 30-minute label.






Electric Interlocks

Electric interlock doors are designed to lock out all other intake doors on a chute when one door is opened. When one door is opened, all other chute doors will remain locked, indicated by a light showing a chute is in use.

Maintenance personnel, by means of a switch at the power supply control box, have the ability to lock out the interlock system when servicing the equipment. This will lock out all doors when the discharge container is out of position or while maintenance is being performed in the discharge area.

The interlock system is pre-wired and is designed to be plugged into a 120V receptacle and stepped down to 24VDC via transformer located in the power supply box.






Pneumatic Doors (Standard & Pneumatic Interlock)

Pneumatic standard and pneumatic interlock intake doors are designed for ease of operation. Pneumatic doors are usually controlled by a push button, which will automatically open the intake door for 7–10 seconds to allow for the disposal of trash into the chute system.

An optional pneumatic interlock feature will function similarly to the electric interlock. When the chute is in use, all other chute doors will remain locked out, which will be signified by a red indicator on the top panel. A standard pneumatic systemallows all doors to operate simultaneously. This system can also lock out all intake doors for maintenance of equipment from the discharge room.

Pneumatic doors are operated by an air compressor, regulator, and dump valve, located in the discharge area. The pneumatic doors can be locked out by shutting off the dump valve, releasing the air in the system, and locking the system out for routine maintenance. A pneumatic system is pre-wired with ⅛" supply hoses and is designed to be plugged into a 1.5HP oil-free air compressor. The regulator is recommended to be set between 90–100PSI for continuous operation.






Heat Detection Sensor

A heat sensor option can be installed on both electric and pneumatic interlock systems. This safety feature will shut the chute system down in the event of a fire emergency. The heat sensor on the electrical interlock will shut down the power source at the control box, which will prohibit intake doors from being opened.

The heat sensor on the pneumatic interlock will automatically dump all air from the chute system, disabling chute intake door operation. The chute manufacturer provides a hook-up connection only for integration into the building alarm system by others.






General Considerations

Linen and many types of rubbish are highly combustible. It is against NFPA 82 code to store trash, recycling, or linen in the chute. The discharge must remain open at all times and be equipped with a device that will automatically close the chute in the event of a fire in the collection room. The collection room must have a hose or hand fire extinguisher, as well as an automatic sprinkler system. Please refer to the manufacturer’s installation instructions prior to installing or operating any chute system.






Recycling & Compaction






Apartment Compactors

Compactors can deliver exceptional quality and power while running quietly. They are designed for high-rise applications and are ideal choices for hotels, hospitals, and apartment and office buildings. The example shown here is for use with compaction cans.

Common standard features on compactors include the following:

• Remote Power Unit • UL Listed Electrical

Components • 5HP Motor 208/230 3PH • Photo Electric Eye with Time

Delay • Automatic Cycle • Mushroom Stop Button • On/Off Key Switch

• Interlocked Side Access Door with Automatic Shut-Off

• Night Shut-Down • Programmable Logic Control

(PLC) • Ratchet Turnbuckle Hook-Up • Soft Shift Single Solenoid

Valve

• Replaceable Low Friction Noise Reducing Wear Pads

• Hinged Steel Wiper Blade • On Light • “Container Full” Light • Oil Pressure Gauge • Excessive Run Timer






Typical Compactor Room

Minimum room requirement size forcompactor, connectedcompaction can and oneextra can in the room is14' x 12½' with properchute location. For shortbody compactor room,minimum size is 12' x 12½'.

Varies in size by chute diameter.






Bagger Compactor

Bagger compactors can also deliver exceptional quality and power while running quietly. They are also designed for high-rise applications and are ideal choices for hotels, hospitals, and apartment and office buildings where the compactor is located in the basement with no easy access for cans. The example shown here is for use with tubular compactor bags.

Common standard features for bagger compactors include the following:• Remote Power Unit • 7½HP Motor 208/230 3PH • Full Bag Shut-Off Switch• Ram Retract Push Button• Bag Hold-Down Arm• Photo Electric Eye with Time

Delay

• Automatic Cycle • Mushroom Stop Button • On/Off Key Switch • Interlocked Side Access Door

with Automatic Shut-Off • Night Shut-Down • Programmable Logic Control

(PLC)

• Soft Shift Single Solenoid Valve

• Oil Pressure Gauge • Excessive Run Timer• “Bag Full” Indicator Light• “Excessive Run Time”

Indicator Light






Typical Bagger Room

Minimum room size requirement for compactor and additional 5' roll off tray is 15' x 10' with properchute location.

Varies in size by chute diameter.






Recycling Sorters

Recycling sorters work with the internal trash chute in multi-story buildings. A recycling sorter such as the one shown here provides an easy method for sorting recyclables out of the waste stream. The system can be either used in new construction projects or installed as a retrofit to an existing trash chute system.

The recycling sorter, available in both tri- or bi-sorting capacities, is located under the trash chute. Using a control panel located at each trash chute door, the user selects the appropriate waste stream. Based on this selection, the sorter system automatically positions one or more deflector plates, which direct the waste into either the compactor (trash) or the specified recycling container (plastic/paper/glass).






Sample Features / Dimensions of Recycling Sorter

• Systems with One or Two Recycling Positions

• Heavy-Gauge Steel • Standard Electric Components• Toters to Receive Recyclables• Interfaces with Chute Door Lockout

System

• Quick System Response Time When Changing Waste Streams

• Control Station Located at Each Trash Door

• Full Function Control Station Located at Sorter

• Recycling Container “Full” Indicator

• Thick Steel Body with ½" Aluminum Diverter Plate

• Electrical System 110V, Single Phase

• Linear Actuator and Control Circuit• Modular Design• On/Off Key Switch• Manual System Controls






Chute Installation






Pre-Installation

• Before the start of the job, make sure that the installation crew foreman reviews and understands the chute shop drawings.

• Confirm that the slab penetrations are properly sized (chute diameter plus 4"), and that all openings are aligned plumb per the detailed shop drawing and are clear of obstructions. Confirm that floor heights and other applicable dimensions are in accordance with the approved shop drawings.

• Upon receipt of the chute, examine all goods carefully and match the individual pieces to the shop drawing and shipping memo, confirming job dimensions and quantities.

• Assemble tools and materials required for the installation.

• All materials should be prefabricated to dimensions shown on the shop drawings. No field cutting or fitting is required. Slip joints permit slight variations in height.

• Manufacturers offer fully assembled doors and frames that should be mounted into the chute intake throat with sheet metal screws. Installation may be in masonry or drywall type walls. Door closer tensions are generally pre-adjusted. Stainless steel protective covering should not be removed until after plastering and painting are completed.






Sample Installation of Chute Sections

• Distribute chute sections to the appropriate floors. All sections should be numbered and should agree with the as-built shop drawing.

• Start installation at the first floor above the discharge level.

• Center the floor frame over the slab opening and make sure the door opening is facing in the proper direction. (If isolator pads are called for, they will be pre-installed on the floor frames.)

Floor.

Floor Frame.

Floor Opening.







• Ensure that a minimum of 2" of bearing surface is supporting each frame leg.

• Lower the intake section down through the floor frame and slab opening.

• Ensure that all clips are properly engaged on the floor frame.







• Insert the beaded section into the intake section, using a flathead screwdriver to guide the section, if needed. Ensure that the bead is firmly seated against the top of the intake section.

• Proceed up to the next floor above and repeat the same steps, inserting the bottom of the next intake section into the top of the beaded section below.

• Repeat the above steps until the topmost intake section is installed.







• Install the wash-down section, if required, by inserting the beaded end into the top of the last intake section, keeping the “wash-down unit” to the front of the chute, in line with the intake doors.

• Add beaded vent sections, bead down, to the top of the wash-down section, until vent risers penetrate the top of the roof slab. Vent sections only (those sections above the last top intake) may be screwed together at the joints with self-tapping sheet metal screws.

• Inspect the sprinklers and wash-down unit to ensure they are ready for connection. The automatic sprinkler heads should be installed and piped in accordance with NFPA standards.






Sample Installation of Roof Vent and Flashing

• Install roof flashing over the vent section protruding through the roof slab, and seat roof flashing firmly on the roof: flat, pitched, or curb, per job site conditions.

• Roof flashing is to be attached and sealed to the roof.

• Install the roof riser section with the vent cap over the roof flashing, ensuring that the bottom of the roof section is firmly seated against the bead of the roof flashing. Secure the roof section to the roof flashing with self-tapping sheet metal screws.

Detail “A”






Typical Roof Vent and Flashing Configurations

PITCHED ROOF FLASHING. PITCHED ROOF CURB.






Typical Roof Vent and Flashing Configurations

FLAT ROOF FLASHING. FLAT ROOF CURB.






Sample Installation of Linen Chute Discharge

• Ensure that the height of the discharge door to finished floor level is per approved shop drawing to avoid subsequent problems with installation of carts or compactors.

• Align clips on the discharge with clips on the bottom of the chute section in the discharge room.

• Install the bolts, nuts, and washers, and tighten securely.






Sample Installation of Trash Chute Discharge

• Ensure that the discharge is held open by the 165°F fusible link attachment shown in this example.

• Install the floor retainer flange to the ceiling of the discharge room, around the chute.

• Fire caulk the perimeter of the floor retainer flange around the chute and ceiling, if required.

Accordion blades held open with 165°F fusible link assembly

Chute riser with clips welded for bolting to discharge damper

Spring strap Locking latch






Sample Installation of Chute Intake Doors

• Ensure that the face of the intake door is square and plumb to the control line of the proposed face wall (as provided by GC).

• Insert the intake doors into the chute intake, and square face to intake. Secure the door with zap screws in pre-punched slots on the door frame. Re-measure to ensure the face of the door is flush with the wall line (as provided by GC).

• Affix all stainless steel trim pieces to intake doors. Leave protective stainless steel film on pieces until completion of drywall and painting.






Sample Installation of Chute Intake Doors

• After completing the installation, check all doors for correct operation and functionality, ensuring that all packing covering the intake doors and handles is still intact to prevent damage to the door during drywall construction.






Sample Installation of Linen Chute Discharge Doors

• For linen hopper type discharge doors, installation is the same, except that an additional pedestal support should be bolted to the bottom of the discharge hopper, adjusted to hopper height, and lagged to the floor. A 2" drain should be hooked up by others.






Final Inspection

• Check to ensure that all slip joints and attachment clips are tight and secure.

• Check to ensure all doors and chute sections are plumb and aligned.

• Anchor all frames to the floor to ensure the chute remains plumb and level.






Installation of Accessory Components







• The D&S unit must be connected to the flushing head.

• The disinfectant is regulated through a proportioning valve in conjunction with the siphoning action.

• The D&S unit should be located above the top intake throat. An access door should be installed to allow access for maintenance and servicing of the unit.






Electric “Plug & Play” Interlocks

• Upon completion of the chute section installation, install interlock equipped doors in the same manner as standard intake doors.

• Each interlock door will be supplied with a quick-connect wiring harness (⅜" flex conduit) connected to the rear of the intake door component box. Start at the top intake floor and carefully feed the wiring harness down the chute shaft, outside the chute.

• The electrical interlock component box cover must be removed from each door prior to making connections. Ensure that the component box cover is replaced after connections are made and all stainless steel trim has been installed.

• Attach each “male” plug in the quick-connect to the appropriate “female” quick-connect located inside the component box.

• Repeat above steps for each intake, working from the top down to the discharge room.

• The master power supply will be mounted in the discharge area in a desired location. Secure the wiring harness from the intake above the discharge room and make the appropriate quick connection, located in the power supply box.






Electric “Plug & Play” Interlocks

• Plug the 24V transformer into a 120V receptacle. The system is now ready for operation.

• Proper care should be exercised during the construction phase:• Ensure all doors are locked.• Ensure all wiring harnesses are protected from the masonry or drywall construction

phase.• Ensure that the main wiring harness is protected until it has been permanently

connected to the power supply box.

• Before preparing the electrical interlock system for normal operation:• Check all wiring harnesses to ensure proper connection. • Inspect all components at each intake for contamination, rust, loose wires, and

damage, and install face plates.

• Electrical interlock doors will not open unless energized. Interlock door trim must be removed and electric interlock cylinder raised manually to open the doors, until the electrical interlock system is functional.






Pneumatic Interlocks

• Upon completion of the chute section installation, install pneumatic equipped doors in the same manner as standard intake doors.

• Each pneumatic door will be supplied with a tubing harness (¾" flex conduit) connected to the rear of the intake door component box. Start at the top intake floor and carefully feed the tubing harness down the chute shaft, outside the chute.

• Tubing connections shall be made at each door per supplied pneumatic schematic, showing the correct configuration. Some manufacturers offer color-coded tubing for ease of installation.

• Quick-connects located inside of each component box on top of the door will allow tubing cable to be connected to each door (i.e. door two tubing cable will drop down and connect to door one).

• A tubing harness attached to door one will be routed to the discharge area and connected to the regulator and air compressor control supply unit. This will energize the pneumatic system.

• Air compressor, regulator, and shut-off valve will be located in the discharge area in a desired location. The shut-off valve will enable all air to be manually dumped from the system for routine maintenance and service or in the event of an emergency.






Pneumatic Interlocks

• Once each pneumatic door has been connected, plug the air compressor into a 120V receptacle and check the system for correct connections prior to powering up the pneumatic doors.

• Proper care should be exercised during the construction phase:• Ensure all doors are locked.• Ensure all tubing harnesses are protected from the

masonry or drywall construction phase.• Ensure that the main supply harness is protected

until it has been permanently connected to the regulator and air compressor supply unit.

• Before preparing the pneumatic interlock system for normal operation:• Check all pneumatic connections per the supplied schematic.• Inspect all components at each intake for contamination, rust and damage and

install face plates.• It is recommended that signage be posted in the disposal area to notify persons of

moving parts while utilizing automatic doors.






Heat & Smoke Detection System

• The electrical interlocking system will lock all intake doors, shutting down the system when the heat at the sensor location reaches a set temperature of 165°F. The heat sensor is located outside the discharge.

• The pneumatic interlocking system will automatically dump all air from the chute system. The heat sensor is located at the discharge.

• A conduit and sensor box is supplied and connected to the power supply control box provided with each chute installation system.






Sound Dampening & Isolation System

Generally, there are two options available:

• Floor frames are supplied with isolator pads, when required, which are pre-installed at the factory.

• The second option is factory applied sound deadening material.

Sound Dampened Chute.






Floor Retainer Flanges at Individual Floors

• Mount underneath the floor slabs or ceilings to hold the insulation (mineral fiberfill or fire-safing).

• These floor retainer flanges should be secured to the floor slab/ceiling.






FAQs






Question 1

Do trash and linen chutes have to vent through the roof?

Trash and linen chutes are required to full vent 3' above the roof penetration as mandated by NFPA 82 Chapter 5*. Variances from this requirement are possible with the approval from the local authority having jurisdiction.

*NFPA 82 Standard on Incinerators and Waste and Linen Handling Systems and Equipment • 5.2.2.4 Chute Venting.• 5.2.2.4.1 A waste or linen chute shall extend (full size) at least 0.92 m (3 ft.) above the

roof of a building of Type II-000, Type III, Type IV, or Type V construction. (See NFPA 5000, Building Construction and Safety Code.)

• 5.2.2.4.2 The chute shall be permitted to extend less than 0.92 m (3 ft.) above the roof of a building of Type I, Type II-222, or Type II-111 construction subject to the approval of the authority having jurisdiction. (See NFPA 5000.)

• 5.2.2.4.3 The chute shall be open to the atmosphere, with the opening being the same cross-sectional area as the chute.






Question 2

Are trash and linen chutes required to be straight and plumb, and can trash and linen chutes offset?

NFPA 82 Chapter 5 permits discharge offsets (any offset that is between the last intake and the discharge) to offset not greater than 15 degrees and vent offsets (above the top intake) not greater than 45 degrees. Discharge offsets are not permitted to be on consecutive floors, and the chute must return to straight and plumb between offsets. Note: Any deviations from this requirement must have the approval from the local authority having jurisdiction.






Question 3

What is the smallest size trash and linen chute that can be specified for my project?

NFPA 82 Chapter 5 states that the minimum size required is 24" diameter or 22½" square constructed of 16 U.S. gauge minimum thickness of stainless, galvanized, or aluminum coated steel. Note: Any deviations from this requirement must have the approval from the local authority having jurisdiction.

Please remember the exam password VENT. You will be required to enter it in order to proceed with the online examination.






Question 4

What is the industry standard diameter for a trash chute, and can I minimize the chance of trash chute jams?

The industry standard trash chute is 24" diameter with 15" x 18" bottom hinged intake doors.

In recent years, larger packing boxes (such as super-sized pizza, television boxes, etc.) have become the number one cause of chute jams. The user attempts to fold up the packaging and tosses it in the trash chute, where it unfolds and gets stuck, causing a chute jam.

Because of this, it is strongly recommend to use a 28" or 30" diameter trash chute with the standard 15" x 18" bottom hinged intake door to lessen the chances of chute jamming. While larger trash chutes can have larger sized intake doors, sticking with the 15" x 18" discourages the forcing of larger items into the chute.






Question 5

What is the required fire resistance rating of the trash and linen chute enclosure walls?

All walls of the trash and linen chute enclosure shall have a fire resistance rating of two hours for buildings with four or more stories in height. Not less than 1-hour fire resistance rating for buildings less than four stories in height. All intake doors for 2-hour rated enclosures must have a fire resistance rating of 1½-hours and a 1-hour fire resistance rating for a 1-hour rate enclosure per NFPA 82 Chapter 5. Note: No exceptions are granted for these requirements.






Question 6

What is the minimum size needed for the trash room on the intake floors?

These small trash rooms are called vestibule trash rooms, and the minimum size permitted by NFPA 82 Chapter 5 shall not be less than that required to maintain a minimum 6" clearance from the back side of the closed corridor door to the intake opening door. The corridor door must be self-closing and have a minimum fire resistance rating of ¾-hour in a 1-hour fire rated partition. The next size trash room on an intake floor must have a 5' ADA turn-around radius enclosed in a room with a fire rating of not less than the chute enclosure with a ¾-hour fire rated, self-closing corridor door.






Question 7

Please explain the UL labeled 1½-hour, maximum 30-minute, 250°F temperature rise test on the intake doors. And is a door with a UL labeled 650°F better constructed?

The testing is performed with a flame source directed to the inside and outside panel of the intake door. For a period of 30 minutes, the temperature on the panels cannot rise more than 250°F. An intake door with the UL labeled 650°F testing is poorly constructed because in 30 minutes, the temperature rose 400° higher than the 250° rated intake door.






Question 8

What is the difference between a public access chute and a restricted access chute?

A general/public access chute is a trash chute that is used by the residents and/or the public. These types of chutes are only permitted to have bottom hinged intake doors of limited sizing based on the diameter or cross-sectional area of a square chute. The intake door area cannot be greater than one-third of the cross-sectional area of a square chute, and 44 percent of the area of a round chute.

A limited/restricted access chute is generally a linen chute that is behind a locked door and is only used by staff or designated personnel. These types of chutes are permitted to have side hinged intake doors with the sizing not to exceed the cross-sectional area of the chute.






Question 9

What’s the difference between a fully welded section and a spiral section?

The fully welded section is a solid piece of 16-gauge material which is rolled and its seam fully welded to ensure no area for snagging debris or linen. It also ensures a completely sealed section, eliminating chances of the section “opening” while inside the chute shaft wall.

A spiral cut section, which is crimped at the seams, easily creates a surface area with protrusions that can, and will, catch falling debris and linen. The crimping increases the chance of seam separation and the section coming apart within the shaft wall. Rusting also is an inherent problem with this type of section, and a greater chance of water leakage during chute wash-downs and washings. Finally, as no machines are strong/large enough, most spiral sections are made of a thinner grade material (18-gauge rather than the NFPA’s minimum required 16-gauge thickness).






Question 10

In the event of a power failure, will pneumatic intake doors allow the user to access the trash chute?

No, without electricity the air compressor will cease to supply the air that operates these doors. However, if no other back-up power source is on site, then a simple supply cylinder of nitrogen or compressed air can be easily attached to the air lines to make the pneumatic intake doors function until the power is restored. These cylinders can be purchased from your local air-gas supplier and stored in minimal space until needed.






Question 11

Can bottom hinged doors be used on a linen/laundry chute?

It is not recommended. Side hinged intake doors are specified for laundry chutes for two reasons:1. The side hinged intake door will open to 180° and offers a much larger opening to

insert large bundles of linen. 2. The second reason is that manufacturers will not warranty a bottom hinged door used

in this type of application because the door only opens to 60° from plumb and cannot handle the stress and strain of oversized bundles of linen.

In the event of a side hinged door, do keep in mind that there must be restricted access to the intake door(s). See Question #8.Note: A bottom hinged door is required in all public access chute applications to meet NFPA 82 requirements; the only thing being deposited in these chutes should be a 13-gallon kitchen trash bag or smaller.






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