The GAMMA double thread screw allows quick and safe installation on all types of pitched roofs covered with corrugated systems, corrugated metal roofing, various types of curved tiles, timber beams, etc. The generous adjustment allows efficient levelling of uneven roofs. The screw is supplied complete with 3 flange nuts with knurled under-head screw lock in Stainless Steel 304 and a high-density EPDM gasket.
The screw is combined with the GAMMA PST-10/12 plate.
TECHNICAL DETAILS
| Code | Material | Size ( mm ) | |||||||||||||||||||||
| Ø Fil. | L Tot. | L aut. | – | – | |||||||||||||||||||
| VDF-10×200 | Stainless Steel | M 10 | 200 | ~ 65 | – | – | |||||||||||||||||
| VDF-10×250 | Stainless Steel | M 10 | 250 | ~ 65 | – | – | |||||||||||||||||
| VDF-12×300 | Stainless Steel | M 12 | 300 | ~ 100 | – | – | |||||||||||||||||
| VDF-12×350 | Stainless Steel | M 12 | 350 | ~ 100 | – | – | |||||||||||||||||
PROPERTIES OF GAMMA ALUMINIUM PROFILE MATERIALS
| Material type | EN AW 6060 |
| Tensile strength Rm (Mpa) | 190 |
| Elastic limit Rp 0.2 (Mpa) | 150 |
| Elongation at 50 mm (%) | 10 |
| HB hardness | 70 |
| Coefficient of linear thermal expansion between 20 oC and 100 oC (1/ oK) | 23×10-6 |
| Preparation for surface oxidation treatment | Excellent |
PROPERTIES OF SUPPORT MATERIALS
| Material type | AISI 304 |
| Shape | Cold-rolled |
| Finish | Heat treatment, pickled and skin-passed |
| Density kg/dm3 | 7,9 |
| Tensile strength N/mm2 | 540 – 750 |
| Elongation at 80mm (%) | 45 |
| HRB hardness | 82 |
| Material type | AISI 430 |
| Shape | Cold-rolled |
| Finish | Heat treatment, pickled and skin-passed |
| Density kg/dm3 | 7,7 |
Tensile strength N/mm2
| 450 – 600 |
|
| Elongation at 80mm (%) | 20 |
| HRB hardness | 85 |
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