A rail for a panel support forming a suspended ceiling, said rail having an inverted T-shaped cross section and having a 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 able to support the panels, which extensions are arranged at the lower end of the web, - a bulbous piece arranged at the top of the web, said rail comprising at least one expansion absorber; said expansion absorber comprising at least: a main opening comprising 2 substantially vertical edges (6a, 6b, 60a and 60b) extending into the vertical web , the 2 edges being spaced apart by a length L1 when the rail is not subjected to a longitudinal compressive force, the 2 edges being aligned so as to abut against one another when the rail is subjected to a sufficient longitudinal compressive force; said main opening extending, at the lower part, as far as an area of material able to form a fold line when the rail is subjected to a longitudinal compressive force; two slits each extending on either side of the main opening over a total length L2 greater than L1, the two slits delimiting, with the base plate , two strips of material which are able to fold, the two substantially vertical edges (6a, 6b, 60a and 60b) extending over a height H1 representing between 0.3 and 0.8 times the height Hb of the web of the profiled element, preferably between 0.4 and 0.8 times the height Hb of the web . - a vertical web extending from a lower end to an upper end, - horizontal extensions forming a base plate , which is able to support the panels, which extensions are arranged at the lower end of the web, - a bulbous piece arranged at the top of the web, said rail comprising at least one expansion absorber; said expansion absorber comprising at least: a main opening comprising 2 substantially vertical edges (6a, 6b, 60a and 60b) extending into the vertical web , the 2 edges being spaced apart by a length L1 when the rail is not subjected to a longitudinal compressive force, the 2 edges being aligned so as to abut against one another when the rail is subjected to a sufficient longitudinal compressive force; said main opening extending, at the lower part, as far as an area of material able to form a fold line when the rail is subjected to a longitudinal compressive force; two slits each extending on either side of the main opening over a total length L2 greater than L1, the two slits delimiting, with the base plate , two strips of material which are able to fold, the two substantially vertical edges (6a, 6b, 60a and 60b) extending over a height H1 representing between 0.3 and 0.8 times the height Hb of the web of the profiled element, preferably between 0.4 and 0.8 times the height Hb of the web . a main opening comprising 2 substantially vertical edges (6a, 6b, 60a and 60b) extending into the vertical web , the 2 edges being spaced apart by a length L1 when the rail is not subjected to a longitudinal compressive force, the 2 edges being aligned so as to abut against one another when the rail is subjected to a sufficient longitudinal compressive force; said main opening extending, at the lower part, as far as an area of material able to form a fold line when the rail is subjected to a longitudinal compressive force; two slits each extending on either side of the main opening over a total length L2 greater than L1, the two slits delimiting, with the base plate , two strips of material which are able to fold, the two substantially vertical edges (6a, 6b, 60a and 60b) extending over a height H1 representing between 0.3 and 0.8 times the height Hb of the web of the profiled element, preferably between 0.4 and 0.8 times the height Hb of the web . <EOS>