The system for winter gardens or architectural constructions. The connection is regulated in eaves beam and wall beam. Connections rafter and transom are the same as in curtain wall systems. The rafter construction allows to use standard glazing beads from other Ponzio’s systems. There is a possibility of using sliding systems like SLIDING 900tt, SLIDING 1200tt. Greater spans can be made, thanks to reinforced rafters and their great bending strength. Rafters and transoms create flat surface from the inside of the construction. It makes a good visual effect and non-limited using area. Characteristics of system: precise relation to other Ponzio window-door systems; rotation on roof in scope from 7 to 45 degrees; easy assembly and prefabrications.