AS 1735.4:2020 pdf free

09-03-2021 comment

AS 1735.4:2020 pdf free.Lifts, escalators and moving walks Part 4: Safety rules for the construction and installation of lifts – Electric and hydraulic service lifts.
5 Service lift well
5.1 General provisions
5.1.1 The requirements of this clause relate to wells containing one or more service lift cars.
5.1.2 The counterweight or the balancing weight of a service lift shall be in the same well as the car.
5.1.3 Jack(s) of a service lift shall be in the same well as the car. It may extend into the ground or other space.
5.2 Well enclosure
5.2.1 A service lift shall be separated from the surroundings by imperforate walls, floor and ceiling.
The only permissible openings are:
a) openings for landing doors;
b) openings for inspection doors to the well and inspection traps;
c) vent openings for escape of gases and smoke in the event of fire;
d) ventilation openings;
e) necessary openings for the functioning of the service lift between the well and the machine room;
1) openings in partition between service lifts or between service lift(s) and lift(s) according to 5.5;
g) for accessible machine rooms (0.3.13.2), perforations in the ceiling separating the well from a machine
room.
5.2.2 Inspection doors — Vertically hinged inspection traps
5.2.2.1 Inspection doors and inspection traps to the well shall not be used except on grounds of the requirements of maintenance.
The dimensions of the inspection doors and traps shall be adapted to their position in the well, their purpose and the visibility for the work to be undertaken.
5.2.2.2 Inspection doors and vertically hinged inspection traps shall not open towards the interior of the well.
5.2.2.2.1 The inspection doors and inspection traps shall be provided with a key-operated lock, capable of being re-closed and re-locked without a key.
If persons are likely to become trapped they shall be capable of being opened from inside the well without a key, even when locked.
5.2.2.2.2 Operation of the service lift shall automatically depend on maintaining these inspection doors and inspection traps in the closed position. For this purpose electric safety devices in conformity with 14.1.2 shall be employed.
This requirement does not apply to doors and traps giving exclusive access to the machine and its associated
parts, but applies to doors and traps giving access to overspeed governor, if any, installed in the well
(9.9.2.6.2).
5.2.2.3 Inspection doors and inspection traps shall be imperforate, satisfy the same requirements for
mechanical strength as the landing doors.
NOTE Relevant regulations to the fire protection for the building concerned need to be taken into account (see 0.2.5).
5.2.2.4 Safe access to these inspection doors and inspection traps shall be provided according to 6.2.
5.2.3 Ventilation of the well
The well may be ventilated. The stale air from other parts of the building shall not be extracted via the well.
5.2.4 Components inside the well
5.2.4.1 The distance from any point of a landing door sill to any components requiring maintenance, adjustment or inspection shall exceed 600 mm.
Where this is not possible, inspection door(s) or trap(s) shall be provided and positioned to meet the same requirement.
NOTE Attention should be paid to the distance between landings.
5.2.4.2 When components are not installed according to 5.2.4.1, the well shall be accessible and the car shall be provided with devices allowing it to be immobilised near to any landing. The devices shall fulfil the requirements of 9.7.4 (and the car roof shall comply with 8.3.2.2).
NOTE Attention should be paid to the distance between landings.
5.3 Walls, floor and ceiling of the well
The structure of the well shall be able to support at least the loads which may be applied by the machine, by the jacks, by the guide rails at the moment of safety gear operation, in the case of eccentric load in the car, by the action of the buffers, by loading and unloading the car, etc.
NOTE Relevant National Building Regulations for the building concerned need to be taken into account (see 0.2.5).
5.4 Protection of any spaces located below the car, the counterweight or the balancing weight
If accessible spaces do exist underneath the service lift well within the area of the car, the counterweight or the balancing weight, precautions according to 9.7 and 10.3.2 shall be taken.AS 1735.4 pdf download.

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