System of lift-and-slide aluminium framed door/window panels comprising a frame profile member and a sliding profile member, said frame profile member comprising a parallelepipedal section with an interior side abutting onto the perimeter of the door/window opening, both in the vertically and in the horizontally extending lengths of the frame profile member, and an exterior side, a plurality of supporting tower portions of nearly rectangular section extending perpendicularly outwardly said exterior side, a central longitudinally extending channel being provided onto an upper side of each one of said supporting tower portions, a stainless steel slide guide member being provided within said channel, an array of trolleys provided with rollers being slidably mounted onto said stainless steel slide guide member, said array of trolleys being adapted to support a rectangularly framed panel made through connecting four abutting lengths of said sliding profile member, each one of said four lengths having been cut at the corners thereof and joined to adjacent lengths of said sliding profile member through interior connecting angular members to form said rectangularly framed panel, said rectangularly framed panel being brought in either a stationary condition fixedly connected onto supporting basements of said trolleys or in a sliding condition whereby it slides onto the support rollers of said trolleys, wherein such translation from said stationary to said sliding condition and vice versa is effected through operation of a handle means that correspondingly brings said rectangularly framed panel in a locked condition and in a freely sliding condition, characterized in that it comprises in combination: an axial plane of symmetry (A-A) medially oriented, perpendicularly along the longitudinally extending said sliding profile member and equidistantly spaced from the two side surfaces thereof, said sliding profile member being absolutely symmetrical on either side of said axial plane of symmetry (A-A) and exhibiting an equally distributed load on each side thereof; four points of punched connection of each one of said interior connecting angular members onto the corresponding corners of said four lengths of said sliding profile member and press punched connection of each pair of said interior angular members at eight points in each corner of the rectangularly framed panel, such 8-point punched connection imparting a three-dimensional enhanced rigidity to the rectangularly framed panel, said interior angular members being alternatively made available at a larger or smaller width to suit sliding profile members incorporating an insulating spacer element or not; an upper surface of said stainless steel slide guide member being loaded with said rectangularly framed sliding profile panel extends outwardly said central longitudinally extending channel being provided onto an upper side of said supporting tower portion of the frame profile member has an elliptical shape and the load of said rectangularly framed sliding profile panel is being exerted axially along the centre of said stainless steel slide guide member passing through said centrally oriented axial plane of symmetry (A-A); said sliding profile member is provided with a deep channel intermediately between a pair of chambers, said channel being equivalently spaced on either side of said axial plane of symmetry (A-A) and adapted to receive a plurality of accessories perimetrically securing said rectangularly framed sliding profile panel onto the perimetrically installed frame profile member, and an assembly of securing angular blades of a perimetrical locking mechanism, and of an anti-burgler wedge-shaped device. an axial plane of symmetry (A-A) medially oriented, perpendicularly along the longitudinally extending said sliding profile member and equidistantly spaced from the two side surfaces thereof, said sliding profile member being absolutely symmetrical on either side of said axial plane of symmetry (A-A) and exhibiting an equally distributed load on each side thereof; four points of punched connection of each one of said interior connecting angular members onto the corresponding corners of said four lengths of said sliding profile member and press punched connection of each pair of said interior angular members at eight points in each corner of the rectangularly framed panel, such 8-point punched connection imparting a three-dimensional enhanced rigidity to the rectangularly framed panel, said interior angular members being alternatively made available at a larger or smaller width to suit sliding profile members incorporating an insulating spacer element or not; an upper surface of said stainless steel slide guide member being loaded with said rectangularly framed sliding profile panel extends outwardly said central longitudinally extending channel being provided onto an upper side of said supporting tower portion of the frame profile member has an elliptical shape and the load of said rectangularly framed sliding profile panel is being exerted axially along the centre of said stainless steel slide guide member passing through said centrally oriented axial plane of symmetry (A-A); said sliding profile member is provided with a deep channel intermediately between a pair of chambers, said channel being equivalently spaced on either side of said axial plane of symmetry (A-A) and adapted to receive a plurality of accessories perimetrically securing said rectangularly framed sliding profile panel onto the perimetrically installed frame profile member, and an assembly of securing angular blades of a perimetrical locking mechanism, and of an anti-burgler wedge-shaped device.