Mechanical Performance
A door (set) installed in a commercial or public building must
physically operate for long periods of time even under conditions
of violent usage where no exercise of care takes place. If the door
does not function correctly at all times then other performance
characteristics such as fire and acoustics may be compromised and
undue maintenance costs will be incurred.
The British Standard Draft for Development DD171:1987
"Guide to specifying performance requirements for hinged or pivoted
doors"
Provides test methods for the evaluation of mechanical
performance and a standard report classification of the test
results. The classification of duty, description and examples
are as follows:
LD-Light Duty
Low frequency of use by those with a high incentive to exercise
care, e.g. by private house owners - small chance of accident
occurring or of misuse. Internal and external doors on
dwellings.
MD-Medium Duty
Medium frequency of use primarily by those with some incentive to
exercise care - some chance of accident occurring or of misuse.
Office doors providing access to designated public areas but not
used by the public.
HD-Heavy Duty
High frequency of use by public and others with little incentive
to exercise care. Chance of accident occurring and of mis-use.
Doors installed in retail, health, education and commercial
buildings which provide access to designated public areas and which
are used by the public.
SD-Severe Duty
Subject to frequent violent usage. Doors installed in stockrooms
etc. commonly opened by driving trolleys against them; and
educational establishments subject to frequent impact by
people.
BS EN 947:1999 "Hinged or pivoted Doors - Determination of
the resistance to vertical load"
Provides a method to determine the permanent deformation caused
when a vertical load is applied to an open door leaf fixed in its
own doorframe as part of a doorset. Such downward force that might
reasonably be expected (a child swinging on a door handle) to
neither damage nor impair the performance of the door.
BS EN 949:1999 "Windows and Curtain walling, doors, blinds
and shutters -Determination of the resistance to soft and heavy
body impact for doors"
Provides a method to be used to determine the damage caused by
striking with a soft and heavy body, the face of a closed door leaf
fixed in its own doorframe as part of a doorset. Such forces
that might reasonably be expected from impacts by human bodies and
substantial objects with similar characteristics that should
neither damage nor impair the normal performance of the door.
BS EN 1192:2000 "Doors - Classification of strength
requirements"
Provides a means of classifying where appropriate, the performance
of door leaves, door frames, door sets and door assemblies
according to their strength in resisting vertical load (BS EN 947)
and soft/heavy body impact (BS EN 949). The performance levels
indicate normal usage for a range of categories of duty similar to
those in DD171 i.e. Light Duty, Medium Duty, Heavy Duty and Severe
Duty.
Structural Performance Guides | |
BS EN 947:1999 |
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BS EN 949:1999 |
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