The protective inner fence installed without the distance from the border drop in altitude. The distance between the horizontal elements in the vertical plane of the protective fencing should be no more than 0.45 m. The height of the element board security fence must be at least 0.10 m. The size of the mesh fencing mesh fill shall not exceed 0.05 m. The design of the mounting barriers to building constructions should be protected against inadvertent unfastening. Signal barriers should be in the form of rope, not designed to load and attached to the posts or sustainable building designs (Construction), with safety signs hung in the form of regular triangles are yellow with a black border with a side of not less than 100 mm.
Making safety signs according to GOST 12.4.026, the distance between signs shall not exceed 6 m. The breaking load of synthetic mesh setepolotna must be at least 1750 N (175 kg). In calculating the strength of mesh fencing is necessary to consider the life setematerialov and aging. Parts and assembly units fencing with a mass greater than 25 kg should have mounting tabs or other devices for slinging. Structural elements fences should not have sharp corners, sharp edges, burrs. The surface of the infill and protective safety-fences should be painted yellow paint signal in accordance with GOST 12.4.026. Synthetic setepolotno before painting with disperse dyes should be saturated with asphalt varnish BT-577, GOST 5631, diluted with white spirit or turpentine.
For the manufacture of fencing using steel bars grade C235 to GOST 27772, aluminum alloys and brands AMg6 1915, GOST 4784, sawn softwood is not below the 2nd grade, GOST 8486, setepolotna of synthetic Synthetic materials, etc. setepolotna be made of nylon or twisted ropes lavsan 3.1 mm in diameter, from a technological shrinkage in finishing more than 10%, the conditioning humidity no more than 1%. Setepolotna entwine the contour capron cord diameter of 8 mm. Strength characteristics setematerialov test must comply with the design. Elements of metal fences must be Primary coated and painted to factory paints, corresponding to slightly aggressive environment on SNIP 2.03.11-85. The class covers – VII in accordance with GOST 9.032. Before painting the surface elements of fences should be cleaned up to grade 4 according to GOST 9.402.