Jeff Wilson Everyday DIY Blog

Let's talk DIY

This is the place to rant, rave, brag, belly-ache, crack a joke, procrastinate, and delve into the metaphysical aspects of the DIY mindset. We’re off the map, on a tangent, and frequently off topic. This is the stuff we don’t show on TV.

Gas and Vacuum Systems for Laboratory and Healthcare Facilities

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This topic includes information related to gas and vacuum systems that are installed in laboratory and healthcare facilities during construction. Gas and vacuum systems deliver compressed air, gas and processed water to point of use locations within a facility. They also serve to remove or dispose of general wastewater, chemical waste and vapors.

Wet-Pipe Sprinkler Systems

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Wet-pipe sprinkler systems are the most common fire suppression systems.  In a wet-pipe system, either the water supplied by the municipality or the water supplied from a fire pumping station provides constant pressure for the system.  When a sprinkler in this system is activated through melting of its fusible link, water is immediately discharged onto the fire.  Water will flow until the fire is extinguished and until the fire marshal shuts off the water supply.

Fire-Extinguishing Systems

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Fire is a chemical chain reaction. Molecules of a flammable material contain stored energy. When they are heated to a certain point, they react with oxygen, releasing that energy in the form of heat. This heat energy then causes other nearby flammable molecules to react with oxygen, continuing the cycle. Fire needs the heat, oxygen, and a fuel of flammable material to continue burning. Fire-extinguishing systems work by separating one or more of the key elements from the equation. Fire is impossible without oxygen. Likewise, if there is no heat, fire cannot spread. And, obviously, if there is no fuel, there is nothing to burn.

 

Dumbwaiters

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Dumbwaiters are a practical, time-saving appliance and are used in today’s residential and commercial buildings to facilitate the transportation of goods from one floor to another. Goods may include firewood, food, laundry, documents, equipment, books and mail, among others. The first known use of a dumbwaiter dates back to the Roman Empire; dumbwaiters were still in common use and assisting servants at Thomas Jefferson’s home in Monticello, Virginia.

Elevator Controls

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As the use of elevators has grown and their performance has been improved to provide safer, more dependable, and more efficient travel for passengers in multi-story buildings, so too have elevator controls been improved. The operation of the modern-day elevator is very complex, involving strict safety requirements. As a part of an elevator's equipment, the controls must accommodate several types of passenger requirements: VIP service (firefighters and medical personnel), restricted access, non-stop service, and peak demand needs. Elevator controls also need to feature modes of operation for fire response and maintenance.

Wheelchair Lifts

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Wheelchair lifts, also referred to as platform lifts, are vertical elevating systems with a platform designed to transport a single passenger between floor levels. Some manufacturers provide units that can travel up to a maximum of 14 feet, but shorter vertical distances (less than one floor) are typical. Wheelchair lifts are typically provided as a prefabricated, self-contained system that can be located indoors or outdoors. They can be installed in an enclosed vertical shaft to provide weather protection, if necessary, or they can be left unenclosed. Like traditional passenger elevators, the wheelchair lift system must meet all the requirements of the ADA.

Trash Chutes

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Trash chutes evolved as a sanitary and economical means of collecting the refuse generated by building occupants in mid-rise and high-rise buildings. The word chute is derived from the French word meaning to fall or drop. Chutes are tubes through which objects slide from a higher to a lower level by means of gravity. There are linen chutes used by hospitals and hotels; construction trash chutes used to handle construction debris in multi-story construction sites; and trash chutes used in multi-story condominiums, apartments, and dormitories. In a trash chute application, the bottom of the chute below the discharge door is a steel container typically located in the trash room. The steel container can be a fully automatic, hydraulically operated compactor or a small, simple cubic yard steel container. Recent developments by many manufacturers have made possible a collection system that allows for the automatic separation and collection of recyclable materials.