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Corogrid is RigiSystems' unique spacer support system, which has been designed for use with double skin metal cladding systems.

Suitable for both newbuild and refurbishment applications, Corogrid offers an innovative and cost effective alternative to the traditional bar and bracket spacer.

The system also provides a more stable method of fixing at greater depths to suit the thickness of insulation specified Unlike other spacer systems Corogrid has the added advantage of the brackets being fixed in place prior to the application of the support bar. This feature makes installation simpler, reduces the potential for human error and is consequently less labour intensive to install.

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F E A T U R E S A N D B E N E F I T S
Unique spacer support system designed for use with double skin metal cladding Brackets can be fixed without bar in place, providing easy access to fixing locations (unlike other systems) Provides a simple and cost-effective construction solution Reduces the risk of human error and on-site costs	Neoprone thermal break prevents cold bridging and provides an effective vapour seal Dimpled fixing zone on support bar ensure fastener security Provides a stable fixing method for all bracket heights Allows small changes of roof pitch to be achieved by varying the bracket height Ideal for both newbuild and refurbishment applications

Brackets

Corogrid brackets are manufactured from high quality 1.5 mm hot-dip galvanised mild steel to BS EN 10143 : 1993 (formerly BS 2989 : 1992. The base of the bracket incorporates a neoprene thermal break which minimises thermal bridging and acts as a vapour seal.

Brackets are available in a range of heights from 60 mm to 250 mm which is usually determined by the thickness of insulation specified or pitch of roof required. In refurbishment applications the profile depth of the existing cladding will also determine the height of bracket required.

Standard Bracket Height (mm) 60, 80, 100, 120, 140, 160, 180, 200, 220, 240

Support Bar

Corogrid support bars are manufactured from high quality 1.25 mm Z35 hot-dip galvanised mild steel to BS EN 10143 : 1993. The support bars feature a unique dimpled fixing zone, which ensures fastener security. Available in lengths of 1, 2 and 3 metres (effective length) the bars have a spigot end to maintain a continuous level of support.

Bracket Spacing Requirements

Using two fasteners into light gauge purlins, the bracket support and fastener assembly has a proven minimum safe working load of 3kN. To calculate the maximum centres of the brackets along the support bar the following information is required:
Main purlin centres in metres (M) and the design wind uplift loading in kN/m2 (W).
The following formula is then applied:
Maximum bracket spacing = 3 divided by M times W

For example purlins at 2 metre centres with a design wind uplift loading of 1.4kN/m2,
Maximum bracket spacing = 3 divided by 2 x 1.4= 1.07 metres
The brackets should be fixed at convenient centres below the calculated maximum e.g 1m spacings.

Fixing Details

The profiled metal liner sheet is attached to the purlins or railings in accordance with the manufacturers recommendations prior to the installation of the Corogrid spacer support system. A continuous vapour control layer (ULTRA 2000 recommended) is then laid over the liner sheet taking care to ensure that all laps are sealed. The brackets are then fixed in place at predetermined centres using standard self-drilling fasteners.