Rail for suspended ceiling comprising expansion absorbers

A rail for a panel support forming a suspended ceiling, said rail having an inverted T-shaped cross section and having a total height (Ht), the rail comprising:

• a vertical web extending from a lower end to an upper end,
• horizontal extensions forming a base plate, which is adapted to support panels, which horizontal extensions are arranged at the lower end of the vertical web,
• a bulbous piece arranged at a top of the vertical web, and
• at least one expansion absorber;
• said expansion absorber comprising
• a main opening comprising two substantially vertical edges extending into the vertical web, the two substantially vertical edges being spaced apart by a first length (L1) when the rail is not subjected to a longitudinal compressive force, the two substantially vertical edges being aligned so as to abut against one another when the rail is subjected to the longitudinal compressive force;
• said main opening extending, at a lower part thereof, as far as an area of material able to form a fold line, said fold line being formed when the rail is subjected to the longitudinal compressive force;
• two slits each extending on either side of the main opening over a total second length (L2) greater than the first length (L1), the two slits delimiting, with the base plate, two strips of material which are able to fold,
• the two substantially vertical edges extending over a first height (H1) representing between 0.3 and 0.8 times a web height (Hb) of the vertical web.