Support profile structure made from light metal or based on light metal, comprising at least one upper and one lower extruded support profile element (110, 120), where each support profile element has an essentially rectangular closed shape with an outer face and an inner face and two sides, characterised in that (i) the upper and lower support profile elements (110, 120) have, in the longitudinal direction of the extruded profile, at least one pair of guide rails (8, 12) as part of the profile, which are arranged on the opposite sides of each profile element essentially over its entire length and are intended for the attachment and movement of photovoltaically active or inactive shading devices and devices for thermal insulation; (ii) the upper support profile element has, on its outer face, essentially over the entire length, a device for attaching a flexible tensionable sheet; (iii) the lower support profile element has, on its outer face, at least one rail, recess or cut-out (15, 34) let into the profile essentially over the entire length, for the accommodation and fixing of services supply, illumination, photovoltaic and tensioning devices, plant culture systems, aids, and tools or for the accommodation of means for the attachment of further profile units; (iv) the at least two support profile elements are connected to one another via their inner faces by a heat/cold insulation element (36, 39, 40, 41, 42), (v) at least one support profile element (110, 120) has, on at least one side, one or more holes for the accommodation of cross struts, posts, connectors, pipes, ventilation elements or other structural members (5, 6), and (vi) the entire support profile structure, including the support profile elements, is essentially straight or curved along its longitudinal axis, or can be tensioned in a curved manner by tensioning devices (18, 19) attached to it. (i) the upper and lower support profile elements (110, 120) have, in the longitudinal direction of the extruded profile, at least one pair of guide rails (8, 12) as part of the profile, which are arranged on the opposite sides of each profile element essentially over its entire length and are intended for the attachment and movement of photovoltaically active or inactive shading devices and devices for thermal insulation; (ii) the upper support profile element has, on its outer face, essentially over the entire length, a device for attaching a flexible tensionable sheet; (iii) the lower support profile element has, on its outer face, at least one rail, recess or cut-out (15, 34) let into the profile essentially over the entire length, for the accommodation and fixing of services supply, illumination, photovoltaic and tensioning devices, plant culture systems, aids, and tools or for the accommodation of means for the attachment of further profile units; (iv) the at least two support profile elements are connected to one another via their inner faces by a heat/cold insulation element (36, 39, 40, 41, 42), (v) at least one support profile element (110, 120) has, on at least one side, one or more holes for the accommodation of cross struts, posts, connectors, pipes, ventilation elements or other structural members (5, 6), and (vi) the entire support profile structure, including the support profile elements, is essentially straight or curved along its longitudinal axis, or can be tensioned in a curved manner by tensioning devices (18, 19) attached to it.