The W beam guardrails are spliced with each other and fixed on the column or beam by connecting bolts. The overlapping direction of the W beam guardrail is the key to installation. The overlapping direction should be consistent with the driving direction. If the overlapping direction is opposite to the driving direction, even a slight collision will cause greater losses.
The W beam guardrail should be adjusted continuously during installation. Therefore, the connecting bolts should not be tightened too early. Otherwise they will not be able to adjust the oblong holes on the plates. After adjustment, use high-strength bolts and tighten the connecting bolts as required to strictly control the torque. The adjusted W beam guardrail should form a smooth waveform to avoid local bumps. The top surface of the W beam guardrail should be coordinated with the vertical curve of the road. When the shape of the W beam guardrail is satisfactory, the bolts should be tightened. But it should be noted that the connecting bolts should not be too tight, so that the oblong holes can be used to adjust the compressive stress.
When the steel pipe-inserted corrugated beam guardrail is used in the W beam guardrail installation, the foundation should be buried synchronously with the pavement construction. Protective measures should be taken to prevent sundries from falling off the pipes. The steel pipe-inserted W beam guardrail should be blow-molded. The weld seam should be firm and flat. Each W beam guardrail should be flat, correct in size, free to twist and pull out. The corrugated beam guardrail is built on the foundation by pumping. The W beam guardrail at the opening can reach the strength of the ordinary road. Its opening flexibility is that a span of W beam guardrail can be pulled out by loosening the six bolts of two columns.