Abstract: Support structure of photovoltaic devices is adapted for anchoring on drilling bases (8) at unreinforced surfaces or on holders (12) at reinforced surfaces. The structure may include a rear leg (5), a front leg (9), a rear beam (4), a bottom beam (6), and a supporting beam (1). The internal angles in the triangle formed by the supporting beam (1), bottom beam (6) and the rear beam (4), equal 60° with the tolerance of ±5°. The distance between the top part of the rear beam (4) and the central axis (O) is less than the distance between the bottom part of the rear beam (4) and the central axis (O). The bottom beam (6) is situated so that the connection of the front leg (9) with the bottom beam (6) is located higher than the connection of the bottom beam (6) with the rear leg (5). Alternatively, the rear beam (4) is situated vertically and the values of each internal angle in the triangle formed by the supporting beam (1), bottom beam (6), and the rear beam (4), are in the extent of 45° to 75°.

Abstract: The device includes the body (1), provided with a helix (3) on the bottom end, and of an ending (4) on the top part of the body (1). The diameter of the helix (3) is in the range of 1.0 to 100 times the diameter of the body (1) and/or of the least transversal dimension of the body (1). The body (1) has a closed or open profile on the cross section, with the body (1) having one profile at least. The pitch of the helix (3) is in the range of 0.1% to 90% with the pitch being linear or variable along the length of the helix and the length of the blade of the helix (3) being 5° at least of the circumference of the body (1) and the drilling base being provided with one helix (3) at least. On the bottom end, the body is provided with a pricker (2), with the pricker (2) being bevelled into one surface at least on the bottom end at the angel in the range of 90° to 0.1° towards the vertical axis of the drilling base and/or with the bottom end of the pricker (2) having a semi-spherical shape.