SPECIFICATION FOR THE SHADOTIMBER SOLAR SHADING SYSTEM

Manufacturer:
Colt International Limited
New Lane, Havant, Hampshire. PO9 2LY
Telephone 023 9245 1111
Fax 023 9245 4220

Product Reference:
Colt Shadotimber Shading Louvre type ST/V/AB92

Product Description:
Fixed or movable external solar shading system, for either horizontal or vertical installation, designed to reduce solar heat gain.

Material:
Western Red Cedar/ European Larch blades size and shape as shown on architectural drawing XXX.
Air Dried.

All principal supporting components manufactured from extruded aluminium alloy grade 6063T6.
Steel component grade S275.
Stainless steel components Grade A2

Dimensions:
Timber profile machined as drawings to meet the integrity and deflection criteria as described later.
Pitch and angle of blade to suit shading requirements.

Decorative finish:
Timber: Self finish 
Aluminium components polyester powder coated to 60 microns with necessary pre-treatment and approved applicator to achieve 25 guarantee.

Loadings:
Complete system to be designed to withstand windloads as described in BS6399 Part 2. The sub-contractor should note that the louvre elements will be subjected to additional aerodynamic effects not covered in BS6399. Appropriate adjustment to the wind pressure coefficients shall be applied having sought appropriate specialist advice.  
The specialist contractor shall show with tender the calculations with details of the aerodynamic amplification factor.

Deflections:
Deflection of timber blade to be limited to span/200. Deflection of supporting structure limited to span/250.

Accommodation of thermal movement:
The works shall accommodate changes in dimension resulting from changes in temperature in any of its part, its supporting bracketry and without any reduction in the performance below the minimum levels required herein.

The surface temperature ranges shall be:
Heavy weight materials,
light colour      -20 °C to +50 °C
dark colour      -20 °C to +60 °C