Platform Lifts And Residential Elevators

Vertical platform lifts are safe, economical, and space conserving ways to overcome architectural barriers up to 12 ft high. These lifts are an alternative to an elevator for limited rises. They are manufactured with a stationary enclosure, including gates and doors, as needed

FIgure 47-4 Inclined platform lift.

for each application, as compared to the stair-mounted lifts described below. These units do not require a hoist-way or runway. Enclosures may be made of steel panels or clear or tinted acrylic panels, which allow the user to have a view from the lift during operation. They can be enclosed overhead when used outdoors. Designs can be customized to fit special decorative requirements. Most platform lifts are not allowed as a means of egress, although the ADA does provide exceptions.

One way to get a person who uses a wheelchair from one floor to another is to install a platform lift on a stair. Winding drum platform lift designs can only traverse straight runs of stairs. Inclined platform lifts (Fig. 47-4) with a rack and pinion drive are able to make turns on stairs, so they can accommodate landings and longer floor-to-floor distances. The rack and pinion driven unit protrudes less than 32 cm (121 in.) from the wall when folded. Pressing a button unfolds the platform lift. The safety barrier arm goes up to the vertical position and the access ramp folds down to allow the

Tina had worked for architects for quite a few years before going off on her own. She remembered the days just after the ADA took effect and before manufacturers had developed appropriate solutions to wheelchair access problems in small businesses. In particular, Tina remembered the time her boss had asked her to do some research on elevators. His client was hoping to expand her restaurant from one floor to two, and they needed to figure out how to make the second floor accessible. Tina's research revealed that the cost of installing an elevator in the restaurant and the space that it would take up would both be prohibitive.

Her next task was to help her boss prepare an ap-

peal to the state's Architectural Access Board, which would rule on whether the upstairs dining areas would have to meet accessibility requirements. The board ruled that the upstairs spaces were required to be wheelchair accessible. As a result, the client decided not to expand the restaurant to a second floor.

Fortunately, this problem now has a solution. A limited use/limited application (LU/LA) elevator could be installed without a separate elevator room or overhead drive equipment, with only a small pit below. If LU/LA elevators had existed back then, Tina and her boss would have been able to proceed with the design of the restaurant, and their client could have expanded her business.

user to enter the lift. Upon reaching the destination level, the safety barrier arm rises to a vertical position and the access ramp lowers to allow the user to exit the lift. Pressure sensitive features stop the unit if it encounters an obstruction. Platforms are available up to 81 by 122 cm (32 by 48 in.), which accommodates a great variety of wheelchairs.

Since the enactment of the ADA, there has been a need for another type of vertical transportation, the limited use/limited application (LU/LA) elevator. In general, LU/LA elevators were created to fill the void between the commercial elevator and the vertical platform or wheelchair lift. Typical applications include schools, libraries, small businesses, churches, and multifamily housing. They are available with cabs measuring 91 by 152 cm (36 by 60 in.), 107 by 137 cm (42 by 54 in.), and 107 by 152 cm (42 by 60 in.) cabs. Phones and control panels that are ADA-compliant are available accessories. An LU/LA elevator uses a roped hydraulic drive system, which does require additional space for a machine room. The pit depth varies from 33 to 97 cm (13-38 in.).

Residential elevators (Fig. 47-5) are available with laminate or wood cab interiors. The doors, which can be designed to look like residential wood doors, have concealed safety locks. Cabs can have a single opening or two openings opposite each other or at right angles. Separate machine space is required. Small private-residence elevators are also used as wheelchair lifts. Because they require overhead equipment space, standard traction elevators are uncommon in private residences. Similarly, hydraulic elevators must have a plunger bore hole below.

A special section of the American Society of Mechanical Engineers (ASME) elevator code A17.1b, part

Figure 47-5 Residential elevator.

XXV, Limited Use/Limited Application Elevators, limits the size of private residence elevators to 1.67 square meters (18 square ft) and the load to 635 kg (1400 lb). They may not rise more than 7.6 meters (25 ft) or go faster than 9.15 meters (30 ft) per minute. These and other safety, drive, and space limitations result in lower costs.

The Productive Entrepreneur

The Productive Entrepreneur

Entrepreneurs and business owners. Discover 45 Insightful Tips To Motivate, Encourage And Energize You To Become A Successful Entrepreneur. These Tips Will Move You Forward Towards Your Goals As An Entrepreneur. Use It As A Handbook Whenever You Need To Get Motivated.

Get My Free Ebook


Post a comment