A support framework for building casings comprising: a plurality of uprights each of which is at least partly made of heat-insulating material and extends along a first prevalent development direction between a first and a second longitudinal end, each upright being destined in use to extend vertically between at least a first floor deck or base and a second floor deck or base of a building structure; at least a constraining element exhibiting a first engaging portion configured so as to be stably constrained to a floor deck or base of a building structure, the constraining element further exhibiting a second engaging portion stably anchored to at least one of said uprights; wherein the constraining element extends along a second prevalent development direction transversal to the first prevalent development direction of the uprights, the second engaging portion of the constraining element connecting to a plurality of said uprights, wherein the first engaging portion of the constraining element comprises a rest surface able to abut against an upper surface or lower surface of the floor deck or base, the second engaging portion of the constraining element comprising a respective rest surface able to abut against a fixing portion of the upright, the first and second rest surfaces (128a, 129a) being arranged transversally, in particular perpendicularly, with respect to one another, optionally wherein the first and the second engaging portions of the constraining element define a section bar exhibiting, according to a transversal section, substantially an L-shape, said section bar extending transversally to the uprights and being directly engaged to a plurality thereof, wherein the support framework comprises at least two uprights aligned substantially along a single prevalent development direction so as to define a lower upright and an upper upright consecutive to one another, facing ends of said uprights (110a, 110b) being configured so as to be arranged at a same floor deck of a building structure, the framework further comprising: • at least a first constraining element stably engaged to the lower upright and configured so as to stably constrain to a lower surface of a floor deck, characterized in that the framework further comprises • at least a second constraining element engaged stably to the upper upright and configured so as to constrain stably to an upper surface of the same floor deck, and in that the lower and upper uprights are axially abutted, the facing ends of the lower and upper upright being at least partially in contact with one another, the framework comprising at least a connecting element which axially constrains the lower upright with the upper upright, wherein the connecting element comprises a first engaging portion constrained to the fixing portion of the lower upright, the connecting element further comprising a second engaging portion constrained to the fixing portion of the upper upright, wherein a first constraining portion of the connecting element is stably connected to the first constraining element, the fixing portion of the lower upright being interposed between the first constraining portion of the connecting element and the first constraining element, and wherein a second constraining portion of the connecting element is stably connected to the second constraining element, the fixing portion of the upper upright being interposed between the second constraining portion of the connecting element and the second constraining element. a plurality of uprights each of which is at least partly made of heat-insulating material and extends along a first prevalent development direction between a first and a second longitudinal end, each upright being destined in use to extend vertically between at least a first floor deck or base and a second floor deck or base of a building structure; at least a constraining element exhibiting a first engaging portion configured so as to be stably constrained to a floor deck or base of a building structure, the constraining element further exhibiting a second engaging portion stably anchored to at least one of said uprights; • at least a first constraining element stably engaged to the lower upright and configured so as to stably constrain to a lower surface of a floor deck, • at least a second constraining element engaged stably to the upper upright and configured so as to constrain stably to an upper surface of the same floor deck, and in that the lower and upper uprights are axially abutted, the facing ends of the lower and upper upright being at least partially in contact with one another, the framework comprising at least a connecting element which axially constrains the lower upright with the upper upright, wherein the connecting element comprises a first engaging portion constrained to the fixing portion of the lower upright, the connecting element further comprising a second engaging portion constrained to the fixing portion of the upper upright, wherein a first constraining portion of the connecting element is stably connected to the first constraining element, the fixing portion of the lower upright being interposed between the first constraining portion of the connecting element and the first constraining element, and wherein a second constraining portion of the connecting element is stably connected to the second constraining element, the fixing portion of the upper upright being interposed between the second constraining portion of the connecting element and the second constraining element.