W-Beam is a standard guardrail panel used to shield roadside hazards. The redirective longitudinal barrier features corrugated two-wave cross sectional design and is often used for median and shoulder applications. W-Beam is made of galvanized steel and is available in 10-gauge and 12-gauge steel.
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The Midwest Guardrail System (or MGS Guardrail was engineered to handle today's modern vehicles. Existing W-Beam barriers were developed many years ago when the vehicle fleet was different than it is today. These existing W-Beam barriers measure 27 5/8" to the top of the rail. When crash tested with today's higher center of gravity vehicles, many results have not been successful.
In -, the Midwest States Pooled Fund Program, funded by 11 states, recognized the need for a new generic strong post W-Beam barrier that would be compatible with the newer higher center of gravity vehicles crash tested under NCHRP 305 Test Level 3 conditions. The result was the MGS Guardrail barrier.
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The differences between the MGS Guardrail Barrier and the older W-Beam barrier are:
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