12.0 Daylight Design Process
The following checklist is a summary of the
lighting issues to be resolved during the design process. It is based
on the RIBA Plan of Work, stages A to E.85,
86 It will be extended to cover aspects for consideration
during later stages up to disposal.
A - Inception
The architect and building services engineer agree
their respective responsibilities and their method for dealing with
daylighting design. The architect should advise the building services
engineer on his intended use of glazing, its location and type. The
building services engineer should advise the architect of any potential
problems associated with the initial designs. At this stage only rough
calculations can be made.
B - Feasibility
Clarify aspects of the brief affecting the
daylighting, such as:
• should
there be a view out?
• what kind
of sports are to be played in the hall?
• is the hall
to be primarily daylit?
• what are
the occupancy periods?
• what are
the ventilation requirements?
• what are
the energy targets and environmental objectives?
Record features of the proposed site likely to
affect daylighting:
• nearby
buildings.
• trees and
shrubs.
• hills.
Obtain climatic and other environmental data for
the site:
• weather.
• probable
daylight and sunlight hours.
• ambient
noise levels.
Identify relevant standards and statutory
requirements and local authority planning directives.
Consider planning and user needs affecting hall
size, such as:
• sizes of
user groups, such as school activities, matches, etc.
• any
activities not requiring daylight.
• nature of
site and other constraints such as local authority planning directives
and overshadowing of, or by, adjacent buildings.
• Using the
rules of thumb based on average daylight factor and the Building
Regulations requirements, estimate the gross areas of windows and/or
rooflights.
Provide the information for initial cost estimates.
C - Outline Proposals
Identify the main design options which meet the
brief and daylighting needs.
Compare the performance of the options in terms of:
• quantity
and quality of daylight for the various sports (combined with the
artificial lighting scheme).
• life costs.
• appearance
of interior (modelling).
Consider using models and simple computer
simulations.
D - Scheme Design
Develop the preferred design option as part of the
whole sports centre, assessing the:
• requirements
of views from other parts of the building.
• effect of
the light flow in the hall and how it affects surface illuminance and
modelling.
• sunlight
penetration avoidance and the need for shading devices.
• average
daylight factor in relation to the activities and artificial lighting,
including controls.
• quality of
lighting, including colour rendering and avoidance of glare.
• energy
efficiency.
• structural
considerations.
• external
appearance of building.
For large halls, consider using large-scale models
(1:10 scale, perhaps) of the main hall space.
Refine the calculations; minimum daylight factor
calculations may be needed.
Make a periodic check of the capital and running
cost implications of using daylight, such as window cleaning,
artificial lighting and maintenance procedures.
