Heavy-duty fasteners is a collective term from the construction industry, which from experience describes load-bearing and retaining anchors with load levels above 2.5 kN.
With lower load levels, one speaks of light fixings, which also manage with simple expansion anchors, e.g. made of plastic.
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As an independent representative of fastening systems from the company Lutz from Wertheim, Wilhelm Modersohn sen. had recognised early on that there was a great demand in the market for fastenings in the area of masonry facades. In March 1970, he and two employees founded the company, which today has over 140 employees.