Guides, buffers and stopping devices

• Pages: 82-84

B6 Guides, buffers and stopping devices

B6.1. General requirements for guides

B6.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, if the car or the counterweight is

provided with such 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.

B6.1 .2. The guides should be fixed to their brackets and to

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

matically or by simple adjustment without any additional work,

of effects due to the normal settlement of the building or shrinking

of the concrete.

B6.2. Guiding of the car

B6.2. 1. The car should be guided by rigid metal guides.

B6.3. Guiding of the counterweight

B6.3.1. 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.

B6.3.2. When the counterweight is guided by ropes or steel

wire guides, they should be at least two in number; the arrangement

should be such that all contact between the counterweight and the

car or the wall of the well is prevented (see B7.2 and B7.3). Each

rope or wire guide should be kept taut.

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