FIELD: agriculture. SUBSTANCE: bench mark has body 2 with longitudinal slit 1, longitudinal opening 5 and screws 3 for attachment on wire 4. Longitudinal slit 1 is made in accordance with diameter of carrier wire 4. Longitudinal opening 5 is offset relative to longitudinal axis of bench mark. Diameter of longitudinal opening 5 exceeds that of wire 4. Attachment screws 3 are arranged on thicker wall of body 2 of bench mark. EFFECT: increased efficiency and reduced expenses for accomplishment of supporting bench mark network for argobridges. 2 cl, 4 dwg
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