SPECIFYING TWO PART U CHANNEL CLAMP

PANEL SIZE 

• Only 80mm thick glass blocks can be used with System 1 (Two Part U Channel Clamp).
• 35mm borders offer the best fit and are aesthetically more pleasing.
• Panels exceeding 6m in any direction should be split using intermediate support/slip joints.

Expansion material should always be incorporated inside the channel, expansion fibre across the head, down both jambs and bitumen at the base to support the weight of the panel. 8mm bitumen and 5mm expansion foam. If the panel exceeds 4m in width or height 10mm expansion foam may need to be used, consult GBT. Golden rules of glass block specification should be considered.

When calculating opening sizes for precast wall panels it is critical that the correct dimensions are specified/detailed and GBT can offer full assistance with this.

The six key areas to consider are:

• Block size                   • Joint width                               • Border width

• Expansion fibre width   • Restraint/clamp system width    • Tolerance