... utility poles, signs, etc.BridgesWhen installed across and at the ends of bridges, guard rail provides ... a lifesaving shield from the bridge and the area below (rivers, railroad tracks, other ... the optimal choice for safety, strength, durability, and cost effectiveness.Constructed of high-strength 12 gauge ( ... Class A) or 10 gauge (Class B) steel and coated in rust-resistant zinc, W-Beam ...