BS/EN 81-21-2018 pdf download.Safety rules for the construction and installation of lifts – Lifts for the transport of persons and goods Part 21: New passenger and goods passenger lifts in existing building.
a) an apron retracted under normal operation, manually extendable when needed and fulfilling the following conditions:
1) lIthe apron is not in the retracted position, normal operation of the lift shall be neutralized by means of an electric safety device in conformity with EN 81•20:2014, 5.11.2;
2) the car door shall be equipped with a locking device in conformity with EN 81-20:2014, 5.3.9.2;
3) the apron shall be unlocked by means of the emergency unlocking key (EN 81-20:2014,
5.3.9.3.1, Figure 13) operated at the apron;
4) putting back the car apron into the retracted position shall be possible manually only from the lowest landing, the pit floor or the car roof, by appropriate means;
5) a direction dependant electric safety device (EN 81-20:20 14, 5.11.2) shall prevent downwards inspection and emergency operations In the zone where the car apron, If not retracted, can collide with the pit floor;
This direction dependant electric safety device for the apron can be realized with the electric safety device according to 5.7.3.4.
6) the stopping distance as required by EN 8 1-20:2014, 5.6.7.5 applies to the retracted position of the apron.
b) or an apron retracted under normal operation, automatically extended on opening any landing door with the emergency unlocking key, and fulfilling the following conditions:
1) if the apron is not in the retracted position, normal operation of the lift shall be neutralized by means of an electric safety device In conformity with EN 81-20:20 14, 5.11.2;
2) the car door shall be equipped with a locking device in conformity with EN 81-20:20 14, 5.3.9.2;
3) in the case of loss of power supply (interruption or switching off), the car apron shall move automatically into the extended position;
4) putting back the car apron in to the retracted position shall be possible:
i) either automatically provided the landing doors are closed and locked; or
ii) manually only from the lowest landing, the pit floor or the car roof, by appropriate means;
5) a direction dependant electric safety device (EN 81-20:2014, 5.11.2) shall prevent downwards inspection and emergency operations In the zone where the car apron, If not retracted, can collide with the pit floor;
5.11.2 if the apron is not in the extended position when the car is not in a zone, which extends from the position of the car resting on its fully compressed buffers to a position of not more than 1 m above the lowest landing sill.
5.9 Height of machine room
The requirements of EN 81.20:2014, 5.2.6.3.2.1 for the height of the machine room may be replaced by the following:
When the clear height at working areas is less than 2,1 m, warnings e.g. using yellow and black stripes according to ISO 3864-1:2011, Figure 17 and/or an adequate warning sign shall be appropriately placed and soft materials shall be provided under the ceiling above those areas.
The clear height of the machine room, measured up to the lower surface of soft materials on the ceiling, shall not be less than 1,80 m for working areas.
NOTE This may be subject to National Building laws.
5.10 Height of machine room doors
The requirements of EN 81-20:2014, 5.2.3.2 a) may be replaced by the following:
Access doors shall have a minimum width of 0,60 m and a minimum height of 1.70 m. When the height is less than 2,0 m, suitable warnings using yellow and black stripes according to ISO 3864-1:2011, Figure 17 and/or an adequate warning sign shall be appropriately placed on both sides of the door.
NOTE This may be subject to National Building laws.
5.11 Dimensions of trap doors for machine room and pulley room
The requirements of EN 81-20:2014 5.2.3.2 c) for the dimensions of access trap doors may be replaced by the following:
Access trap doors for persons shall give a clear passage of at least 0,60 m x 0,80 m, and shall be counterbalanced.
When one of the dimensions is less than 0,80 m, warnings using yellow and black stripes according to ISO 3864-1:2011, Figure 17 and/or an adequate warning sign shall be appropriately placed on both sides of the trap door.
5.12 HeIght of landing doors
The requirements of EN 81-20:2014, 5.3.2.1 may be replaced by the following:
The clear height of the entrance of a landing door shall be the maximum allowed by the building constraints, however not less than 1,80 m.BS/EN 81-21-2018 pdf download.