BS EN 14846

Features assessed include normal use (and abuse) forces, long-term durability, fire/smoke resistance, corrosion, temperature and humidity resistance, and security from both physical attack and electromechanical manipulation.

This standard has a nine digit classification coding.

Three categories of use are identified (see below) and the forces/torques specified, reflect this:

• -  Grade 1: low frequency of use by people with a high
  incentive to exercise care and a small chance of
  misuse, e.g. internal residential doors
• -  Grade 2: medium frequency of use by people with some incentive to exercise care but where there is
  some chance of misuse, e.g. internal office doors
• -  Grade 3: high frequency of use by public or others with
  little incentive to exercise care and with a high chance of misuse, e.g. doors in public buildings

Thirteen grades are identified with minimum figures for deadbolt operation (manual, automatic and electrical) and latch bolt operation (with and without side load) as shown.

Nine grades are identified with maximum figures for closing force at various door masses as shown.
Note: closing force is from a standing start: i.e. fully extended latch bolt in contact with striking plate at start of test.

Seven grades are identified in ascending order of smoke/fire resistance as shown:

Grade 0 - No requirement (not intended for use on fire/smoke doors)

Grade A - Suitable for use on smoke door assemblies only

Grade B - Suitable for use on smoke/fire door assemblies (> 15 minutes)

Grade C - Suitable for use on smoke/fire door assemblies (> 30 minutes)

Grade D - Suitable for use on smoke/fire door assemblies (> 60 minutes)

Grade E - Suitable for use on smoke/fire door assemblies (> 90 minutes)

Grade F - Suitable for use on smoke/fire door assemblies (> 120 minutes)

No requirement, but note: an electromechanically operated lock or striking plate conforming to this standard can, at the same time, also be part of an exit device conforming to EN 179 or EN 1125, or part of an exit system conforming to prEN 13633 or prEN 13637.

Fifteen grades are identified with neutral salt-spray (NSS) corrosion resistance grades from EN 1670:1998, and with temperature and humidity resistance requirements as shown.

Seven grades are identified with minimum figures for requirements relating to physical attack. Principal requirements are shown below.

Two grades are identified according to whether or not there is status indication as follows:
Grade 0 No status indication
Grade 1 Audio or visual signal from lock to indicate that deadbolt is fully thrown and deadlocked

Four grades are identified indicating required levels of resistance to various forms of manipulation and interference as shown: