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Bw methodology for the select. General methodology for the selection of glazing ICS It partially supersedes BS General methodology for the selection of glazing; — Part 2: Code of practice for energy, light and sound; — Part 3: Code of practice for fire, security and wind loading; — Part 4: Code of practice for safety related to human impact; — Part 5: Code of practice for frame design considerations; — Part 6: Code of practice for special applications; — Part 7: Code of practice for the 6622-1 of information.
Recommendations for standards of workmanship for glazing have been published separately in BS and therefore this subject is not dealt with in this standard.
Since the correct selection of materials to be used in glazing for buildings depends on many factors, the recommendations in this part of BS should be used in conjunction with those in the other parts. As a code of practice, this British Standard 6262-11 the form of guidance and recommendations.
It should not be quoted as if it were a specification, and particular care should be taken to ensure that claims of compliance are not misleading. This publication does not purport to include all the necessary provisions of a contract. 62621- are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. In particular, attention is drawn to the following statutory regulations: Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover.
The BSI copyright notice displayed in this document indicates when the document was last issued.
These recommendations do not apply to: For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies.
BSLoading for buildings — Part 2: Code of practice for wind loads. BSLighting for buildings — Part 2: Code of practice for daylighting. There are many requirements that previously had been regarded as client-set for example, security that are being incorporated into legislation outlined in Annex A.
BS – Glazing for buildings. General methodology for the selection of glazing
The sequence in Figure 1 outlines such a methodology, which is expanded on from 4. In this methodology, it has been assumed that: NOTE The desire to provide a visual link 62262-1 the 6262-11 of the building to the outside and, in some cases, vice versa might determine the size, proportion and type of window and the positioning of intermediate frame members and, hence, the size and type of the glass and plastics glazing sheet material, all of which are beyond the scope of this code of practice.
The size and type of the glass and plastics glazing sheet materials, and in some cases the surrounds, might be affected by Approved Documents England and WalesTechnical Handbooks Domestic and Non-domestic Scotland and Technical Booklets Northern Ireland as detailed in Annex A. The use of expensive glass and plastics glazing sheet materials 626-1 be assessed against the possibility of reduced fuel consumption and lower running costs.
The comparative costs of glazing materials should be considered in conjunction with their life expectancy and the probability of need for maintenance. For guidance, see BS The design requirements in 4. Consideration of natural lighting should be related to the provision of artificial lighting. Preventing the sun from entering the window aperture is one way to control direct glare from the sun.
In relation to glare from the sky, or reflected glare, it is possible to use special glass and plastics glazing sheet materials with reduced light transmission in order to produce satisfactory lighting. Methods exist for the prediction of glare indices when direct sunlight is excluded. These relate to the size and shape of the glazed area, the luminance of the relevant part of the field of view and the light transmission characteristics of the glass and plastics glazing sheet materials.
As a general rule, maintaining the size and reducing the light transmission of the glass or plastics glazing sheet materials is recommended, rather than maintaining a high light transmission and reducing the area.
This is because the contrast between the glazed area and its surrounding opaque walls, etc. The rate of fading depends on the nature of the object, the duration and intensity of the exposure and the type of radiation. When assessing the performance of glass or plastics glazing sheet materials in reducing fading, it should be considered that fading can result from exposure not only to ultraviolet radiation but also to some parts of the visible radiation in sunlight and skylight.
NOTE Solar transmission, gs heat gain, thermal insulation and heat absorption are discussed in 6622-1 detail in BS Unwanted summertime solar gains can be dealt with by the means of window design and orientation, and various forms of shading.
Solar gains that occur during the heating season can be used to advantage by considering window geometry and orientation and 626-1 suitable controls on heating and lighting systems. Glazed areas enable daylight to be admitted to a building but at the expense of a comparatively high heat loss. Multiple glazing has reduced heat loss lower U-value compared with single glazing because of the additional thermal insulation provided by the cavity ies separating the individual panes.
Glass and plastics glazing sheet materials can also be used in conjunction with insulating materials to reduce the heat loss through an opaque 626-1 element. Using multiple glazing reduces the risk of condensation on the indoor surface of glass or plastics glazing sheet materials.
Most noises are complex in that they include sounds of different frequencies and amplitudes. The range of sound energy to which the ear responds is very large. The mean sound insulation value of glazing is predicted, with reasonable accuracy, from its mass. However, it is not the mean sound insulation value that is important but the sound insulation at the dominant frequencies of the relevant noise spectrum.
High insulation values at other frequencies in no way compensate for a deficiency in these bands. Where two parallel panes are of equal thickness, a drop in sound insulation occurs at the coincidence frequency of the individual panes. By employing panes of different thicknesses, this loss does not occur at 6226-1 same frequency and thus an improved sound insulation performance results.
Glass and plastics glazing sheet materials separated by an air space or a plastics interlayer can provide increased sound insulation. However, the vibrations gs the first pane can be transmitted to the second pane and also via the surround. Theoretically, non-parallel panes should provide better acoustic insulation than parallel panes.
However, 2662-1 the angle of incidence of the noise is well defined, this improvement is negligible in practice.
In addition to considering the risks of accidental impact, or where activities generate a special risk, the following criteria should be taken into account: The basic considerations are: It is important to consider the possibility of interaction between adjacent materials, both in the glazing system and between it and the surrounding area. NOTE 1 However, if the complexities of the design 626-21 obviously beyond BSa wind engineering specialist should be consulted.
NOTE 2 The topic of wind loading and load carrying capacity of glass b plastics glazing sheet materials is discussed in more detail in BS Adequate provision for cleaning, care and replacement should be incorporated in the design of the building. This is yet to be published. Glass and Glazing Federation. Consider feedback from previous projects and other information. Check and examine constraints and evaluate. Make preliminary selection of glazing system. Consider the following design requirements: Confirm previous preliminary selection or, if necessary, modify and re-examine.
Figure 1 — Sequence of design evaluation for glazed areas 6? Under certain circumstances, refurbishment, i. The regulations are set by the appropriate legislators and are separated into the following regions: A number of approved documents in 662-1 and Wales, technical booklets in Northern Ireland 662-1 technical handbooks domestic and non-domestic in Scotland, accompany the regulations.
The documents that could influence the selection of glass and plastics glazing sheet materials are listed below. Code of practice for selection and use of construction materials. BSPatent glazing and shaping for buildings — Part bw Code of practice for design and installation of sloping hs vertical patent glazing. BSPatent glazing and sloping for buildings — Part 2: Code of practice for sloping glazing. BSGlazing for buildings — Part 2: Code of practice for energy, light and sound.
BSGlazing for buildings — Part 3: Code of practice for fire, security and wind loading. BSGlazing for buildings — Part 4: Code of practice for safety related to human 6262–1.
BSInclusion of glass in the construction of tables or trolleys — Specification. BSSpecification for inclusion of glass in the construction of furniture, other than tables or trolleys, including 622-1, shelving systems and wall hung or free standing mirrors. BSWorkmanship on building sites — Part 7: Code of practice for glazing.
BSWindows, doors and rooflights — Part 1: Design for safety in use and during cleaning of windows, including door-height windows and roof windows — Code of Practice. The Stationery Office,