| 摘要 |
<p>A modular guardrail (1) formed by a series of vertical supporting uprights (2) fixed to the ground one after another along the edge of the road, and by one or more longitudinal members (3) fixed on the vertical uprights (2) one after another in a substantially horizontal position to form a longitudinal containment cross-member that extends along the roadside, at a given height from the ground; the longitudinal members (3) and/or the vertical uprights (2) being formed by one or more half-shells or profiled elements with complex cross section (12, 13, 14, 15), and which are designed to partially overlap and then be stably fixed one to the other, and by a series of through fixing elements (4) structured to lock the half-shells or profiled elements with complex cross section (12, 13, 14, 15) one another in a stable way; at least one of the through fixing elements (4) comprising an expansion plug (5) made of vulcanized rubber, and which is designed to be mounted passing through two or more overlapping flaps of the half-shells or profiled elements with complex cross section (12, 13, 14, 15), and an expander nail (6) made of plastic or metal material, and which is designed to be force-fitted into the aforesaid expansion plug (5) so as to cause expansion of the body of the expansion plug (5) against the flaps of the half-shells or profiled elements with complex cross section (12, 13, 14, 15) with consequent stable locking thereof against one another.
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