Solid dark line on chart indicates maximum frame height possible for a given maximum frame width.
Broken line on chart indicates maximum frame height possible for a given maximum frame width when each panel is stiffened with a horizontal mullion.

The total number of panels in a unit is only restricted by structural steel consideration. Any custom size is possible up to the maximum size shown.
Generally, the minimum width of each panel is 1'11" (600 mm).

The maximum size limits are based on the weight of a double glazed panel that has a net glass thickness of 5/16" (8 mm). This glass is insulated and each pane is 5/32" (4 mm). For other net glass thickness, this maximum size limit chart will not apply.