Coupling details
| Standard Mullion/Transom |
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Guidance |
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- Maintains clean lines
- Colour matched to frames
- Accepts common 36mm frame depth of Series 10, 20, 30, 40, 45 and 50
- 'H' profile to room side face gives positive frame location and ensures a good seal
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- Transom spans above 1.4mm may require separate support
- Factors will include the upper window
– style
– size
– glaze
- Standard method – 25mm box section set behind interlock stile and bolted to transom
- Alternative method (weight dependent) – 25mm flat bar hanger bolted to transom
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| Heavy Duty Mullion/Transom |
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Shaped coupling |
- Couples Series 60, 80, 90
- Colour matched to frames
- 'H' profile to room side face gives positive frame location and ensures a good seal.

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- Patterned timber sections finished to complement frames
- Suitable for
– bay windows
– slope glazing

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Box Section Mullion/Transom |
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76mm x 38mm or 102mm x 45mm
- Use as partition location point on ribbon windows
- Use as wide-span transom for mid rail applications

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