Maximum glazing bar spans stated in the charts contained on this page are based on a generic site close to sea level, 30km away from the sea, 5m height of glazing from ground level, a duo-pitched roof shape, a 15°roof pitch and glazing bars being spaced at 600mm centres.
Single glazed data is based on a 6mm thick glass infill whereas double glazed data is based on 2x6mm thick glass infills. Any deviation from these variables can significantly alter the maximum achievable span so please do contact us for expert guidance of this subject.
On deep glazing (slope lengths over 3200mm) a structural intermediate purlin (by others) is usually introduced into the design at the mid span position to enable a lighter glazing bar section to be used. Because glass over this length is not available in a single peice as standard, a convenient and common place to join the glass is over the intermediate purlin.
Our aluminium glazing bar ranges are available in lengths up to 6000mm-7500mm but will require intermediate support at these lengths.