Okay Engineering types, I have a large parking lot which is bordered at one end by a 16 foot tall Keystone type wall. The top of the wall is at parking lot level(parking lot is on fill). The edge of the wall is 4 feet behind a 6" tall by curb. I have about 100 feet I need to protect. The vehicles are mainly semi-tractor trailers with lots of turning movements in this area. Plus it is down hill from truck parking to wall at a 5% grade. My first thought was a standard CalTrans Guard rail. Then I started wondering if there are more economical methods...Any suggestions? Maybe a tall curb? But how tall?
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