GUARD RAIL Russian patent published in 2008 - IPC E04H17/02 

FIELD: constructional engineering.

SUBSTANCE: guard rail contains load-bearing racks to be installed along the perimeter of protected area. Load-bearing racks have metal mesh cloth placed thereon, made in the form of interconnected and consistently tightened along perimeter mesh panels of steel pretensioned wire with drawing strengthened skin with intersecting rods welded and hot-dip galvanised at iron and zinc ratio changing by skin direction in the range of 1:3 to 5:1000 respectively. The mesh cloth of vertical panels is fixed to racks by means of wire shackles, rods of adjacent mesh panels being interconnected with an overlap outside racks by means of metal plate clamps. Single clamp fastens adjacent net sections of guide unit, white double clamp attaches basic net section to vertical or horizontal net sections of tunnel-preventive covering and sections of forward and backward climbing shields. Welded joints of section mesh cloth are directed to outer side of guar rail. Guar racks are mounted from guar outer side. Section wire skin covers trengthened layer and have galvanised coating of density at of least 0.210 kg/m². Strengthened section wire skin is produced by drawing. The racks design is simplified, accuracy of net effect detection is improved even in case of single damage, cost is lowered, maintenance service is simplified, parameters variety of net and racks coating is excluded, and thus improved reliability unter hard climatic conditions is provided.

EFFECT: construction of effective external guard rail; wider range of external guard rails.

16 cl, 11 dwg