Expansion joint for building works

An illuminating body (22) for building works, comprising:

• a profile (8) elongated in a longitudinal direction, having a bottom wall (11) and two side walls (15) and forming a channel;
• at least one illuminating element (9) positioned inside the channel,
• a transparent covering element (14) inserted in a housing formed by the profile (8) close to an upper opening, by means of two undercuts (16) inside the profile (8),
• wherein one of the side walls (15) of the profile (8) comprises coupling means for fixing the profile (8) to a fastening flap (2 or 3) of an expansion joint designed to connect two structural elements (4, 5) separated by a space (6), the profile (8) being connectable to the expansion joint outside the space (6), wherein said at least one side wall (15) has a protrusion (17) elongated longitudinally, slidably insertable in a corresponding longitudinal groove (18) of a side wall of the fastening flap (2, 3), and wherein said side wall (15) has a flat outer face extending between the protrusion (17) and an upper end of the side wall (15) adjacent to the upper opening of the profile (8), wherein the protrusion (17) projects laterally in cantilever fashion from said flat outer face of the side wall (15) and defines a maximum lateral size of the profile (8), wherein said side wall (15) has a rib projecting from the side wall (15) in cantilever fashion towards the inside of the profile, to define one of said undercuts (16).

A method for mounting an expansion joint (1) for building works, comprising the steps of:

• rigidly connecting a first and second fastening flap (2, 3) to a corresponding first and second structural element (4, 5) separated by a space (6), the fastening flaps (2, 3) and the space being (6) elongated in a longitudinal direction;
• interconnecting the fastening flaps (2, 3) by an elastic connector (7) interposed and positioned in the space (6) to allow a relative movement of the structural elements (4, 5);
• and
• fastening to at least one of the fastening flaps (2, 3), from the side opposite the elastic connector (7), a profile (8) forming a channel elongated in the longitudinal direction and containing at least one illuminating element (9).