Point fixed glass systems are used most frequently in structural glass curtain walls to create transparency and depth of vision for the occupants.

The glass panes are either bolted or clamped with components providing attachment to the structural system. The most common system type is often referred to as a “spider” system. The metallic fingers that support the glass facades allow the designer to increase transparency by minimizing the structural framing.
A four- armed fitting, usually of cast stainless steel, supports four glass panes at adjacent corners on the glazing grid and ties back to the structural system. The spider fitting is designed to provide for glazing system movement under environmental loading, as well as to accommodate specified field tolerance during assembly.