Safety rules for the construction and installation of lifts — Electric and hydraulic service lifts

Safety rules for the construction and installation of lifts — Electric and hydraulic service lifts
AS 1735.4-2020 pdf download.Lifts, escalators and moving walks
Part 4: Safety rules for the construction and installation of lifts — Electric and hydraulic service lifts.
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 potection 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 unloadin9 the car, etc.
NOTE Relevant National Building Regulations for the building concerned need to be taken into account (see 0.2.5)
5.5.2.1 This partition shall extend at least from the lowest point of travel of the car, the counterweight or balancing weight to a height of 2,50 m above the floor of the lowest landing.
The width shall be as to prevent access from one pit to another.
5.5.2.2 The partition shall extend through the full height of the well if the horizontal distance between the edge of the car roof and a moving part (car, counterweight or balancing weight) of an adjacent lift/service lift is less than 0,50 m.
The width of this partition shall be at least equal to that of the moving part, or part of this, which is to be guarded. plus 0,10 m on each side.
5.6 Headroom and pit
Any device as required in 5.2.4.2 shall allow to ensure in the headroom, a free vertical distance of 1,80 m
above the car roof.
5.6.1 Top clearances for traction drive service lifts
5.6.1.1 When the counterweight rests on its fixed stop(s) or its fully compressed buffer(s), the car guide rail length shall be such as would accommodate a further guided travel of at least 0,10 m.
5.6.1.2 When the car rests on its fixed stop(s) or its totally compressed buffer(s), the counterweight guide rail lengths shall be such as would accommodate a further guided travel of at least 0.10 m.
5.6.2 Top clearances for positive drive service lifts
5.6.2.1 The guided travel of the car upwards from the top floor until it strikes the ceiling of the well shall be at least 0,20 m.
5.6.2.2 When the car rests on its fixed stop(s) or its fully compressed buffer(s) the guide rail lengths of the balancing weight shall be such as would accommodate a further guided travel of at least 0,10 m.
5.6.3 Top clearances for hydraulic service lifts
5.6.3.1 When the ram is in its ultimate position, achieved through the means of ram stroke limitation according to 123.2.3, the car guide rail length shall be such as would accommodate a further guided travel of at least 0,10 m.
5.6.3.2 When the car rests on its fixed stop(s) or its fully compressed buffer(s) the guide rail lengths of the balancing weight, if there is one, shall be such as would accommodate a further guided travel of at least 0,10m.AS 1735.4-2020 pdf download.