Support frame comprising: - a plurality of uprights, - a plurality of crossbars engageable to said uprights, - a plurality of joints each of which configured for engaging with each other an upright to a respective crossbar, wherein each of the uprights and/or each of the crossbars is a pultruded product of composite material, said product comprising an elongated body extending along a prevalent development direction and delimited by an outer surface comprising: - a base surface and - one or more projections emerging from a base surface and arranged transversely to the prevalent development direction of the elongated body, said projections or successive sections of the same projection being spaced from each other in a direction parallel to the prevalent development direction, wherein each joint includes: - at least one seat intended to receive a portion of the upright, - a main body, - a half-shell engageable to the main body and movable with respect to the latter at least between: ∘ an open condition wherein the half-shell is at least partly spaced from the main body, ∘ a closed condition wherein the half-shell is locked to the main body and defines the seat which is configured for receiving said portion of the upright and to prevent at least one relative movement between upright and joint along a direction parallel to a prevalent development direction of the upright, characterized in that the main body has a first half-part of said seat at least partially covered by a layer made of soft material, and/or wherein the half-shell has a second half-part of said seat at least partially covered by a respective layer of soft material, said soft material of at least one or each of said layers having compressive deformability greater than that of the material forming the main body and greater than that of the material forming said one or more projections on each pultruded product. - a plurality of uprights, - a plurality of crossbars engageable to said uprights, - a plurality of joints each of which configured for engaging with each other an upright to a respective crossbar, wherein each of the uprights and/or each of the crossbars is a pultruded product of composite material, said product comprising an elongated body extending along a prevalent development direction and delimited by an outer surface comprising: - a base surface and - one or more projections emerging from a base surface and arranged transversely to the prevalent development direction of the elongated body, said projections or successive sections of the same projection being spaced from each other in a direction parallel to the prevalent development direction, - a base surface and - one or more projections emerging from a base surface and arranged transversely to the prevalent development direction of the elongated body, said projections or successive sections of the same projection being spaced from each other in a direction parallel to the prevalent development direction, wherein each joint includes: - at least one seat intended to receive a portion of the upright, - a main body, - a half-shell engageable to the main body and movable with respect to the latter at least between: ∘ an open condition wherein the half-shell is at least partly spaced from the main body, ∘ a closed condition wherein the half-shell is locked to the main body and defines the seat which is configured for receiving said portion of the upright and to prevent at least one relative movement between upright and joint along a direction parallel to a prevalent development direction of the upright, - at least one seat intended to receive a portion of the upright, - a main body, - a half-shell engageable to the main body and movable with respect to the latter at least between: ∘ an open condition wherein the half-shell is at least partly spaced from the main body, ∘ a closed condition wherein the half-shell is locked to the main body and defines the seat which is configured for receiving said portion of the upright and to prevent at least one relative movement between upright and joint along a direction parallel to a prevalent development direction of the upright, ∘ an open condition wherein the half-shell is at least partly spaced from the main body, ∘ a closed condition wherein the half-shell is locked to the main body and defines the seat which is configured for receiving said portion of the upright and to prevent at least one relative movement between upright and joint along a direction parallel to a prevalent development direction of the upright, characterized in that the main body has a first half-part of said seat at least partially covered by a layer made of soft material, and/or wherein the half-shell has a second half-part of said seat at least partially covered by a respective layer of soft material, said soft material of at least one or each of said layers having compressive deformability greater than that of the material forming the main body and greater than that of the material forming said one or more projections on each pultruded product.