W20 internal door screen systems are the slimmest of all hot rolled steel framing systems available; offering maximum glass area, thin sections and exceptional performance. The system utilises traditional steel glazing bars which is one of the reasons they’ve become so popular, due to the almost limitless choice of design. The system works extremely well for all types of internal partitioning. Internal systems offer the designer even more freedom of expression to create truly bespoke solutions as many surface finishes which are unsuitable for external glazing can be used.