Glass

How can I calculate the weight of the glass?

What is the maximum weight for a glass door?

What is the maximum height for a glass door?

What is the maximum width for a glass door?

Can I use variable glass thicknesses?

Where do I have to use manifestation?

Why would I use rails instead of patch fittings?

Can I use a frameless glass door in a fire screen?

Where can I use a glass door?

Do you have fittings suitable for bolted glazing?

What about Approved Document L?

How can I calculate the weight of the glass?

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To calculate the weight of the door, you multiply the thickness of the glass by 2.5.
· 8mm glass weighs 20kg per square metre
· 10mm glass weighs 25kg per square metre
· 12mm glass weighs 30kg per square metre
· 15mm glass weighs 37.5kg per square metre.

What is the maximum weight for a glass door?

Maximum weights will depend on the thickness, height and width of the glass. The maximum weight refers to the TOTAL door weight – inclusive of glass and ironmongery (including any handles being used). You can, on a low use door such as a cupboard, have a maximum weight of 150kg, but the standard maximum door weight is 80kg.

What is the maximum height for a glass door?

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DORMA recommend a maximum height of 2.4m however, note that DORMA work on the basis of maximum weights rather than heights or widths, so this could vary according to the thickness of the glass.

What is the maximum width for a glass door?

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DORMA recommend a maximum width of 1.1m however, note that DORMA work on the basis of maximum weights rather than heights or width.

Can I use variable glass thicknesses?

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Yes, for instance you could use 15mm or 19mm thick glass, however, due to its greater weight it will limit the size of the glass door or assembly.

Where do I have to use manifestation?

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DORMA Glass dealers will be able to advise on manifestation in relation to your particular project, however, in order to comply with the DDA and Approved Document M glass doors and screens will satisfy the requirements if:
a. They are clearly defined with manifestation on the glass at two levels, 850 to 1000mm and 1400 to 1600mm above the floor, contrasting visually with the background seen through the glass (both from inside and outside) in all lighting conditions;
b. manifestation takes the form of a logo or sign at least 150mm high repeated if on a glazed screen), or a decorative feature such as broken lines or continuous bands, at least 50mm high;
c. glazed entrance doors, where adjacent to, or forming part of, a glazed screen, are clearly differentiated from it by the provision of a high contrast strip at the top, and on both sides;
d. glass entrance doors, where capable of being held open, are protected by guarding to prevent the leading edge constituting a hazard.
The guidance in Approved Doc M reflects more recent experience of manifestation and should take precedence over the guidance in Approved Document N where it may appear to conflict.

Why would I use rails instead of patch fittings?

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Rails allow the use of larger and more secure doors, and they also provide a safe bottom edge for the door. Door leafs greater than 1100mm wide should use a bottom rail, and door leafs greater than 80kg in weight.

Can I use a frameless glass door in a fire screen?

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No, DORMA do not supply a suitable product for use within a glass fire screen.

Where can I use a glass door?

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DORMA fittings are available for both external and internal glass doors, sliding doors - both face fixed and ceiling fixed, sliding-stacking doors, shower doors, and furniture doors.

Do you have fittings suitable for bolted glazing?

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Yes, DORMA has the Manet Construct, Rodan and Loop ranges. For more information contact 01462 477600.

What about Approved Document L?

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Approved Document L does not apply to applications such as showrooms, shops, and glass atriums with a party wall. For technical assistance, contact us on 01462 477600.