Specification for the Shadoglass Solar shading system
Manufacturer
Colt International Limited
New Lane, Havant, Hampshire. PO9 2LY
Tel. 023 9245 1111
Fax. 023 9245 4220
Product Reference
Shadoglass type: (select) System 1 / System 2 / System 3 / System 4 / System 5
Product Description
Fixed or controllable glass louvred external solar shading system, designed to reduce glare and solar heat gain, for installation at any angle on the building.
The configuration of the system is determined by the building's geometry, the requirements for solar shading, and by the architect. A wide range of glazing types are available depending on the building's functional and aesthetic requirements. The heat and light reflecting glass louvres are designed to reduce solar radiation, while maintaining excellent visibility through windows.
With controllable systems, the design of the operation of the movable louvres will be to ensure that solar shading is effective whilst daylight entry is optimized.
System 1 type (select) type LS1-55 / LS1-65A / LS1-65B
Glass louvres to be nominally **mm (max. 3000mm) long x **mm (max. 500mm) wide, depending on windload.
The glass is spider fixed to aluminium cast brackets, which themselves are attached to an aluminium torsion tube spanning between the mullions.
System 2 type (select) type LS2-30 / LS2-301
Glass louvres to be nominally **mm (max. 2000mm) long x **mm (max. 500mm) wide, depending on windload.
The glass is spider fixed to aluminium cast brackets, which themselves are attached to the mullions.
System 3
Glass louvres to be nominally **mm (max. 4000mm) long x **mm (max. 600mm) wide, depending on windload.
The glass is fixed to aluminium extruded side clamps along the short ends of the blade. Blades over 2m long will require an additional clamp in the centre of the blade. The clamps are attached to a triangular profile extrusion, which in turn are attached to the vertical mullions with stainless steel pins and maintenance free bushes.
System 4 - back-hinged
Glass louvres to be nominally **mm (max. 1800mm) long x **mm (max. 500mm) wide, depending on windload.
The glass is fixed to aluminium brackets clamping around the front and rear of the blade. The support brackets are mounted to the mullion with a lever arm and control rod allowing the louvres to open as a back-hinged blade. This allows for the glass louvre to sit in front of the mullion providing a seamless continuous appearance when viewed from the outside.
System 5
Glass louvres to be nominally **mm (max. 2000mm) long x **mm (max. 600mm) wide, depending on windload.
The glass is fixed to aluminium extruded side clamps along the short ends of the blade. Blades are attached to the vertical mullions with stainless pins and maintenance free bushes. The blades are centrally pivoted.
The extrusions are attached to the glass using factory applied structural silicone. The structural silicone is designed so that the glass can not be pulled out under all defined loadings when both sheets are broken. The blades are designed to allow for easy removal and replacement of the blades in the event of breakage.
The aluminium support frame-work shall consist of unitised panels supported on a floor by floor basis.
All types:
Supports: All principal non - glass components are manufactured from aluminium alloy type 6063 T6 to a polyester powder finish to a RAL colour. Fixings are from stainless steel grade A2. Deflection under maximum load is limited to 1/250 of span.
Glass: The louvres shall consist of laminated, class A safety glass designed to meet the following design constraints. It is envisaged that a combination of heat strengthened and toughened glass will be required. Toughened glass shall also be heat soak tested.
The glass thickness is to be determined in order to achieve:
- Maximum deflection: Span/150.
- Maximum deflection under self-weight: Span/360.
- Impact loads to meet class B in table 2 of BS8200. "Design of non-load bearing vertical enclosures"
- Anticipated thermal stresses.
- Prevention of de-lamination.
Ceramic frit pattern to be advised. Ceramic ink shall be fully fused onto the surface of the glass during the heat treatment process and be permanent and durable into the glass and form part of the glass substructure.
The extent, colour, pattern and combination of the glass type to give the required shading and daylight performance as required by the architect/ service engineer.
Interlayer: The two panes are to be laminated together with the ceramic frit on the inside (layer 2). Minimum interlayer thickness shall be 1.5mm. The material used for the interlayer is designed to meet the performance requirements. The interlayer shall not be affected by the connection to the structural silicon or the EPDM seals.
The edges of the glass are to be matt ground. The glass shall be clean cut, without significant edge faults (including feathered edges, shells or other imperfections) and the interlayer free from bubbles, inclusions, cracks, ripping dimples or other defects.
The glass shall have a minimum of a 10 year warranty against de-lamination of the interlayer.
Control of louvres: Each motor shall be capable of operating a maximum of 20 louvres.
Actuator: Operation of the blades is by an externally rated IP65 linear 240V ac stainless steel actuator.
Bearings: To be maintenance free.
Structural considerations
(a) Windloads. The 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.
(b) 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: light colour -20 °C to + 50 °C. dark colour -20 °C to + 65 °C.
(c) Testing. A test specimen will undergo a series of tests to demonstrate that:
- that the framing system will hold the glass following soft and hard body impact
- that each leaf within the laminated glass will remain in place after the specified impacts have been applied.
- that the glass and glazing assembly will remain in place during high wind loading, after one or more panes of glass have broken.
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