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.
CP8118 : 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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