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Installing an 18kg (40lb) projector screen onto a concrete ceiling

I have a large projection screen that I need to install into a (seemingly) pretty stable concrete ceiling -- at least that's what I assume it is -- it sounds very solid when hit with a hammer, ...
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Recommended loads for expansion plugs using different screw diameters

Standard expansion plugs S 8 (drill hole diameter d0 = 8 mm) are suitable for wood and chipboard screws with diameters from 4.5 mm to 6 mm. Using a wood screw with a diameter of 6 mm, the highest ...