![]() For example, one of the illustrations in De Re Metallica (1556) contains a drawing of a millwright using a pair of sawhorses to support the beams he is forming. Modern sawhorses are usually made of dimensional lumber, but the basic form of the sawhorse has remained unchanged for centuries. The Type III barricade has multiple rails supported by two end posts with feet. ![]() Type I indicates sheeting on top Type II has sheeting on top and bottom. The Type I (or II) barricade also known as a waffle-board barricade resembles a sawhorse that can be folded flat.The A-frame barricade or parade barricade resembles a sawhorse with a brightly painted top rail.Formerly made of wood, now many have metal structural members or are made wholly of plastic or composite. ![]()
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