They are offered in two sizes - with a height of 72 mm and a width of 115 mm and a height of 120 mm and a width of 115 mm. They are lighter than traditional lintels in the shape of L. The span reaches up to 4.2 m, which eliminates the need for casting long beams "wet". They are characterized by ease of installation and high functionality, they can be used in przesklepieniach door openings in the partition walls, the garage doors and many other places - without the need for additional work.
For investors important may be able to mount tapes of blinds without fear of reducing the surface glazing. It is worth mentioning the extraordinary span prestressed concrete lintels KONBET SBN, it reaches up to 4.2 m with the longest lintels L-19 have only 3.6 m span. This feature is particularly important in the assembly, eg. Garage doors.