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The columns can be formed by high-frequency welding, and if they are otherwise processed, test data should be available to ensure their strength. The bolt holes of beams, pillars, and girders should be positioned at an accurate angle, and all the joined bolt holes at each end should be completed by a single punch. The guardrail end shall be moulded. Beams and mouth posts must not be wrought and drilled on site. When installed in a section with a curve radius less than 70m, the beam should be machined into a corresponding arc shape according to the size of the curve radius. The appearance quality of the rotating barrel should be uniform and consistent, with smooth edges, no bristles, no flyedges: no defects such as flakes, cracks, bubbles, and sand eyes on the surface, and the overall shape of the cylinder is complete and no obvious tilt. The exterior color of the casing shall be uniform and consistent, the interior and exterior shall be smooth, free of defects such as caves, pits, holes, tear marks, and impurities, and the cross-section shall be free of bubbles and cracks.
Barriers & Site Protection
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