4F 1 is a thermal break system for curtain walls with mullions and transoms with structural sections of depths 50|80|100|120|150|180 mm and a width of 50 mm. The 56 mm glazing panel is inserted frontally and placed on specific glass supports. 4F 1 comes with specific ending caps, completely concealed, in stainless steel to join the heads of the mullions with the transoms.
