Fiber composite universal frame made of ROEDURTHERM E-300 AS-I, ROEDURTHERM E-300 AS-HT or ROEDURTHERM E-300 AS-C for adapting masks and AC bridges. The masks are placed on the passepartout from the top and can be fixed via downholders if needed. They consists of ROEDURTHERM E-300 AS-I angles that are attached to the T-flutes of the AC bridges and can easily be assembled. The T-flutes can be inserted from both the front side as well as the long side. Additional traverse systems with tail hooks are applicable in order to stabilize large-scale platines or universal cover systems.