Rail designed to support weight and undergo severe and complicated situations of use. The quadrangular shape of the Sintra Rail profile and the quality of its material, is expressly designed for installations where a rail is required that is capable of supporting and sliding without any problem, curtains weighing up to 6 kg per meter of rail. This collection provides a solution to any assembly formula, both decorative with steel or bronze supports, and functional with plastic supports for rail-type ceiling installation, being able to play both rail and decorative bar functions at the same time. Also includes corded and non-corded rail variants.