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BS 8206-2:1992

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Lighting for buildings Code of practice for daylighting
Available format(s)

Hardcopy , PDF

Superseded date

30-09-2008

Language(s)

English

Published date

15-06-1992

Committees responsible
Foreword
Code of Practice
Section 1. General
1. Scope
2. Definitions
2.1 General
2.2 Sunlight
2.3 Skylight
Section 2. Aims and criteria for design
3. The contribution of daylight
4. Windows and view
4.1 Principle
4.2 Analysis of view
4.3 View in urban areas
4.4 Size and proportion of windows
5. Daylight and room brightness
5.1 General
5.2 Sunlight: principle
5.3 Sunlight duration
5.4 Skylight: principle
5.5 Average daylight factor
5.6 Minimum values of average daylight factor in
     dwellings
5.7 Uniformity
5.8 Contrast between the interior and the view outside
6. Daylight for task lighting
6.1 General
6.2 Quantity of daylight
6.3 Quality of daylight
Section 3. Further design issues
7. Electric lighting used in conjunction with daylight
7.1 Functions of supplementary electric lighting design
7.2 Enhancement of room brightness
7.3 Task lighting
7.4 Change in lighting at dusk
8. Sunlight shading
8.1 General
8.2 Overshadowing
9. Energy efficiency
9.1 Energy consumption in lighting
9.2 Window design and energy efficiency
9.3 Passive solar design
9.4 Lighting controls
10. Conservation of materials inside buildings
10.1 General
10.2 Factors affecting degradation
10.3 Improving conservation
11. Statutory requirements affecting the provision of
     daylight
11.1 General
11.2 Rights of light
11.3 Building regulations
Section 4. Methods of calculation
12. Sunlight
12.1 Sunpath diagrams
12.2 Probable sunlight hours
12.3 Use of models
13. Calculation of average daylight factor
13.1 Windows and rooflights with continuous obstructions
     of uniform height
13.2 Limitations of the formula
13.3 Room depth
14. Calculation of daylight illuminance
14.1 General
14.2 Calculation of daylight factors at a given point
15. Examples of the calculation of window transmittance
15.1 Average daylight factor
15.2 Daylight factor at a point
15.3 Overall aperture and net glazed area
Appendices
A. Data for daylight and sunlight calculations
A.1 Daylight factor tables
A.2 Values of reflectance and transmittance
A.3 Availability of sunlight
A.4 Availability of skylight
B. Standard service and design service illuminances
C. Bibliography
Tables
1. Minimum glazed areas for view when windows are
     restricted to one wall
2. Sky component (CIE overcast sky) for vertical glazed
     rectangular windows
3. Conversion of average to minimum internally
     reflected component
4. Approximate values of the reflectance of light
5. Correction factors for deterioration of interior
     surfaces, to be applied to the internally reflected
     component
6. Mean light transmittance and correction factors of
     glazing materials
7. Correction factors for dirt on glass
8. Correction factors for frames and glazing bars
9. Diffuse orientation factors for an 09.00 to 17.00
     working day
10. Examples of activities/interiors appropriate for
     each standard service illuminance
Figures
1. Window reveal drawn on a sunpath diagram for London
2. Obstructing building superimposed on the sunpath
     diagram
3. Use of sunlight probability diagram to determine
     sunlight reaching window reference point
4. Angle of visible sky used in calculating average
     daylight factor
5. Limiting depth of a side-lit room
6. Dimensions used in BRS simplified daylight table
7. Use of daylight protractors
8. Typical spectral transmission curve of 6 mm clear
     float glass
9. Sunpath diagram for London (latitude 51 deg N)
10. Sunpath diagram for Edinburgh (latitude 56 deg N)
11. Sunlight probability diagram
12. Diffuse illuminance (Eh) availability for London
13. Diffuse illuminance (Eh) availability for Edinburgh
14. Mean horizontal diffuse illuminances at London (Kew)
15. Spectral composition of north sky daylight at 5700
     deg K
16. Flow chart for obtaining design service illuminance
     from standard service illuminance
Index

Includes the design of electric lighting when used in conjunction with daylight. Sunlight and skylight data are given.

Committee
EL/1
DevelopmentNote
Supersedes 90/16169 DC, BS DD67(1980) and BS DD73(1982) (10/2005)
DocumentType
Standard
Pages
44
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

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