| 摘要 |
This is a steel arch 4.5 cm in diameter, 3.5 mm thick and 120 cm high with a width of 84.5 cm. 20 cm from the ground and from its end is a sheet of Perspex 5 mm thick and 80 x 80 cm high. To support this sheet a steel U-shaped bracket holds it, assisted by 6 "Parker" screws, knowing that the side uprights are welded to the arch. Set into the ground at a depth of 20 cm, 8 holes are filled with concrete. At the same depth are 4 steel lugs. The base is of a greater diameter than the tube and has 2 holes for casting in concrete to allow a better bedding of this tube 6a. The shape of the ends can vary according to the positioning of the arches. Particularly designed to protect pedestrians inside towns.
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