A3. Landing doors
A3.1.1. The openings in the well giving access to the lift car
should be fitted with imperforate doors. When closed those doors
should completely cover the openings, subject to the necessary
clearance, which should be as small as possible and in any case
less than ¼in. (6mm).1
A3.2. Strength of landing doors and their frames
A3.2.1. (1) Doors and their frames should be so constructed
that the doors will not become deformed in the course of time.
It is recommended that metal doors should be used in all cases.
(2) The use of glass, even wired glass, or of plastic material should
be allowed only for the vision panels referred to in A3.6.2(a).
A3.2.2. Landing doors should comply with the fire prevention
and protection rules in the country where the lift is installed. In
addition, without necessarily being as fire-resistant as the walls
of the well onto which they open, landing doors should afford
a degree of protection against fire corresponding to that required
for those walls.
A3.2.3. Doors and their locks should have adequate strength
For the requirements respecting the car side of landing doors see Al .7.1.
2 In this respect the following criteria could be adopted:
(a) locked landing doors should withstand without permanent deformation
a horizontal force of 661bf (3Okgf or 3OdaN) applied at any point on
either side of a door panel, this force to be evenly distributed over an area
of 4sq.in. (25cm2) in a round or square section. After this the doors
should function normally;