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A weightlifter holding an Olympic barbell loaded with plates ranging from 5 to 25 kilograms A pair of adjustable dumbbells with "standard" plates Grip plates arranged on a plate holder (or "plate tree") A weight plate is a flat, heavy object, usually made of cast iron, [1] that is used in combination with barbells or dumbbells to produce a bar ...
Weight plates used in Olympic lifting, which are often termed "bumper" plates, are coated in solid rubber to make them safer to drop from above head height. General strength training or powerlifting plates are made from cast iron and are considerably cheaper. Currently, the following colour code is required by International Weightlifting ...
Iron Boots During the 1930s and 1940s, the BUR Barbell Company sold iron boots under the trade name "BUR Foot-Weight". [9] Unlike traditional iron boots, the BUR Foot-Weight design called for weights to be attached to the bottom of the boot rather than to the sides. Iron boots were included with both the BUR Quick Change Set and the BUR 185 ...
Weight plates are slid onto the outer portions of the dumbbell and secured with clips or collars. Shown to the right is a "spinlock" dumbbell, whose ends are threaded to accept large nuts as collars. Alternatively, a dumbbell may have smooth ends with plates being secured by a sprung collar.
The bumper plates are coated with rubber to allow the weights to be dropped from various heights—either after a successful lift or during an unsuccessful one. Olympic bumper plates conform to international standards for coloring. That is, 10 kg is green, 15 kg is yellow, 20 kg is blue, and 25 kg is red. [19]
This target had three wrought iron plates of 4.88 by 1.12 m. These were mounted above each other on a frame of teak beams. The two plates below were 9" thick, the one on top was 6" thick. Behind it was a 990 mm thick supporting layer of oak and other materials, like Hercules had. This made the 9" belt 1,219 mm thick in total. [13]