(57) A section (4, 4'4') with a "T" profile comprising a rib (24) and a plate (28) which
extends from a first to a second end (12, 16). The section (4,4',4") having, in proximity
of at least one of said ends (12, 16) a coupling element (20) suitable to engage with
a further section (4"), and the rib (24) comprising at least one engagement aperture
(36) shaped to house said coupling element (20). Advantageously, the coupling element
(20) comprises an attachment base (40) to the rib (24) which projects at least partially
from the section (4,4',4") with a free end (44), and a tongue (48) elastically flexible
and connected to the attachment base (40). The tongue (48) is bent towards the attachment
base (40) at said free end (44) so as to form an angle of incidence with the attachment
base (40), and is provided with a coupling hole (52) suitable to engage with at least
a first tooth (56) of the engagement aperture (36).
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