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The Quantal Roof complies with the Design and Material
Codes of Practise detailed below:
Material
BS 6262: Glazing for Buildings
BS 1161 1977(1991) : Specification
for Aluminium Alloy Sections for Structural Purposes.
Dimensions, geometrical properties
and mass per unit length of aluminium alloy sections.
Cover angle, channel, lipped channel, I, tee and bulb
tee sections.
BS8118 : 1991 : The Structural use
of Aluminium.
Alloy grade/properties: 6063 T6 Maximum
permissible bending stress = 96N/mm2
BS 5516 : 1991 Code of Practice for
Design and Installation of Sloping and Vertical Patent
Glazing.
Two edge of four edge patent glazing
systems with glass and plastics glazing sheet materials.
Gives structural and other design recommendations, including
minimum thickness' of single and double glazing and
installation and maintenance.
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Loading
BS 6399 Pt 1:1984 : Design Loading
for Buildings Part 1: Code of Practice for Dead and
Imposed Loads.
(Partial safety factor = 1.2, for
Dead, Wind and Imposed Loading)
BS 6399: Pt 3:1988 :
Design Loading for Buildings Part
3 : Code of Practice for Imposed Roof Loads.
Section One: General
Section Two: Snow loads - 25 years
exposure : load factor = 0.82 Maximum site altitude
- 250 metres No abnormal load patterns
CP3 : Chapter V Wind Loads Part 2
: 1972
Restrictions of use: 25 years exposure;
load factor =0.9
Local topography features ignored
Maximum Ridge Height = 5 metres
No dominant openings
Maximum roof pitch = 37.5 deg
Minimum roof pitch - 15 deg
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