In line with our customers' high quality standards, the system has been tested with one million opening cycles and counteracts the bimetal effect thanks to innovative composite technology.

 

The AT 740 SI-D system offers over 100 frame-sash combinations, ranging from sash-covering on both sides to opening on the inside to click-filling or the visually appealing shadow-free variant. The variety of designs and the creative possibilities enable you to set design accents in an almost unlimited choice of colors.

 

In addition, you can use the system to equip the door with up to four sealing levels as required. You determine the U-value yourself according to customer requirements. The use of roller hinges in aluminum or stainless steel as well as screw-on and concealed hinges complete the range of variations. The quality standards for AT 740 SI-D and our other profile systems begin in the development phase. Our profile wall thicknesses are therefore 2 mm and ensure a high level of process reliability in production. In order to ensure stable fitting fastening, the wall thickness in this area has even been increased to 3 mm. This detail will have a positive effect on burglary resistance and long-term function.