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In 1941, the Hilti company Maschinenbau Hilti OHG was founded by Martin (1915–1997) and Eugen Hilti (1911–1964), [3] with the opening of a mechanical workshop in Schaan, Liechtenstein. Martin Hilti was trained in mechanical engineering and automotive design at the Wismar Engineering College and was 26 at the time of founding the company.
Rockwool A/S (or AS), [6] also known as the ROCKWOOL Group, [3] is a Danish multinational manufacturer of mineral wool products headquartered in Hedehusene, Greater Copenhagen, Denmark. The company's R&D unit, employing 100 people as of 2016, is co-located with the headquarters in Copenhagen.
Ramset powder-actuated tool. A powder-actuated tool (PAT, often generically called a Hilti gun or a Ramset gun after their manufacturing companies) is a type of nail gun used in construction and manufacturing to join materials to hard substrates such as steel and concrete.
Heat resistance of mineral wool [11] Material Temperature Glass wool: 230–260 °C Stone wool: 700–850 °C Ceramic fiber wool: 1200 °C Hydroponics.
Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...
Screw piles, sometimes referred to as screw-piles, screw piers, screw anchors, screw foundations, ground screws, helical piles, helical piers, or helical anchors are a steel screw-in piling and ground anchoring system used for building deep foundations.
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