BS 6262-4-2018 pdf free download.Glazing for buildings Part 4: Code of practice for safety related to human impact
3 Terms and definitions
For the purposes of this part of BS 6262, the following terms and definitions apply.
3.1 critical location
part of a door, wall or other part of a building most likely to be subject to accidental human impact
3.2 film retention system
means of attaching the adhesive backed polymeric film on adhesive backed polymeric filmed glass to the supporting structure
3.3 glazing (noun)
glass, or plastics glazing sheet material, for installation into a building
3.4 glazing (verb)
action of installing glass, or plastics glazing sheet materials, into a building
3.5 insulating glass unit
assembly consisting of at least two panes of glass, separated by one or more spacers, hermetically sealed along the periphery, mechanically stable and durable
[SOURCE: BS EN 1279‑1:2004, 3.1]
NOTE The individual panes may be of different sizes, glass types and/or thicknesses.
3.6 manifestation
technique for enhancing a person’s awareness of the presence of transparent glazed areas
3.7 pane
single piece of glass, or plastics glazing sheet material, in its finished size ready for glazing
3.8 pane size
dimensions of a pane
NOTE See Figure 1.
3.9 plastics glazing sheet material
plastics materials in the form of a single sheet, or a combination of sheets laminated together, or an extruded multi‑wall sheet
3.10 safety filmed glass
glass product that has had an adhesive backed polymeric film applied
NOTE See BS EN 15755‑1 for further information.
3.11 safety glass
glass product that has a performance classification for pendulum body impact resistance
NOTE Pendulum body impact resistance for safety glass is classified in accordance with BS EN 12600.
3.12 safety plastics
plastics glazing sheet material that has been classified for pendulum body impact resistance
NOTE Pendulum body impact resistance for safety plastics is classified in accordance with BS 6206.
3.13 sloping glazing
glazing between horizontal and 15° of true vertical
3.14 unbacked mirror glazing
glazing which has either no backing or only partial backing behind its entire area, or has a backing that does not retain its integrity or is cracked or broken when tested
NOTE See BS EN 14749 for further information.
3.15 vertical
true vertical within a tolerance of 15°
4 General safety considerations
4.1 Glazing in critical locations
COMMENTARY ON 4.1
Many human impact injuries are due to failure to take reasonable safety precautions. Some materials,such as glass, might break under impact and cause injury. Most people are aware of this and treat such materials with due care. However, a person’s ability to perceive this potential risk and to cope with it can vary. Safety standards are therefore based on a number of factors including the assumption of a reasonable level of awareness and behaviour and also suitable product design and choice of materials.
Accident statistics show that glazing in some locations in buildings, termed critical locations, is more vulnerable to human impact than in others.
Detailed recommendations are given in Clause 8.
The designer, or specifier, should take precautions to reduce the risk of injuries from accidental human impact in the following critical locations:
a) doors and door side panes;
b) low‑level glazing, where the glazing might be subject to accidental human impact;
c) inwardly sloping glazing, where the glazing might be subjected to inadvertent head impact;
d) bathing areas, where the glazing is adjacent to or surrounding private or public swimming pools;
e) special risk areas, where the planned activity generates a special risk; and
f) where there is a difference in level guarded by barriers.
NOTE 1 At the time of publication, BS 6262‑6 is due to be revised and it is intended that it will incorporate a section on glass in barriers and guarding similar to the glass section currently in BS 6180.
NOTE 2 Glazing in locations other than critical locations is not likely to be subject to human impact and consequently not likely to cause injury.
Glazing of a suitable type, thickness and size should be selected, primarily by reference to impact behaviour and safety characteristics (see Clause 6), to provide an appropriate degree of human safety,taking into account the intended use of the building. In addition the following criteria should be taken into account: loading, i.e. wind, snow, maintenance, self‑weight and any other imposed loads (see BS 6262‑3), and fire (see BS 6262‑3).
Risk of injury can be reduced by:
1) providing mechanical protection to glazing in critical locations; and
2) where appropriate, enhancing a person’s awareness of the presence of glazing by incorporating manifestation.
When it is required that the glazing, on impact, should remain in position and be unbroken/unpenetrated the manufacturer should be consulted.
4.2 Additional considerations for sloping glazing
COMMENTARY ON 4.2
Detailed recommendations are given in Clause 9.BS 6262-4 pdf download.