Guides, buffers and stopping devices

• Pages: 46-49

A6. Guides, buffers and stopping devices

A6.1. General requirements for guides

A6.l.1. The strength of guides, their brackets and joints

should be sufficient to withstand the stresses imposed by the

operation of the safety gear, as well as by deflection caused by

uneven distribution of the load in the car. Such deflection should

be limited to a level that will not affect the normal operation of

the lift.

A6.l.2. The guides should be fixed to their brackets and

to the wall in such a manner as to permit compensation, either

automatically or by simple adjustment without any additional

work, of effects due to normal settlement of the building or shrink-

ing of the concrete.

A6.2. Guiding of the car

A6.2. 1. The car should be guided by rigid metal guides.

A6.3. Guiding of the counterweight

A6.3.1. The counterweight should be guided either by rigid

metal guides or, if the distance between rigid attachments does not

exceed lOOft (30m), by means of ropes or steel wire guides.

A6.3.2. When the counterweight is guided by ropes or steel

wire guides, they should be at least four in number; the arrange-

ment should be such that all contact between the counterweight

and the car or the wall of the well is prevented (see A7.2 and A7.3).

Each rope or wire guide should be kept taut.

A6.4. Car and counterweight buffers

A6.4. 1. A lift should be provided with buffers at the bottom

limit of the travel of the car and of the counterweight.

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