Panel supported on four sides
This style of panel can be constructed in either Rods & Mortar or Easifix*
The stability of a panel connected to the opening (supported) on all four sides is achieved by the rods being connected vertically, but primarily horizontally using Rods and Mortar. With Easifix, it is the horizontal spacer profile connected to both vertical jambs with anchor brackets.
Restraining each side of the glass block panel to the perimeter opening means no edge is a weak point.
(*Easifix in the right application, ie, internal and not fire rated).