Question - Anyone know how deep the concrete foundation goes on this fence. it doesnt look very deep in the video and the section of steel fence seems to only set in 4 feet or so into the concrete. Not too difficult to tunnel under, or is there more to it?
There are sensors to help detect digging.
I’ve read 10 feet of concrete, several times.
“Anyone know how deep the concrete foundation goes on this fence?”
Generally, 6 feet deep is the minimum spec for the 18 foot bollards, in soil. It can vary based on approved local designs, to accommodate slope, bedrock, soil composition and hydrology.
The technology for detecting tunnels (and the act of tunneling) is kept kind of under wraps and out of sight, but vibration sensors protect the foundation and some distance below it, while periodic ground penetrating radar scans can detect tunnels deeper still.
The neighborhood kids and Jose Six Pack are basically deterred by a six foot foundation. The see through design of the bollards also means that tunnels have to start far back from the bollards, and come up far from them, to escape visual detection while digging, making it an expensive, lengthy (and dangerous) team effort.
Kids used to be able to scrape enough sand away to belly under in just a few minutes. Just the massive reinforced concrete foundation alone, defeats casual tunneling attacks, that might more easily escape detection.
Over, under and through are the three ways of defeating the barrier - each is comprehensively analyzed and addressed in the design of the total package of “Wall System” designed for each segment of the border.
Significantly, Wall System is under persistent surveillance as part of its fundamental design. Monitoring software (AI) will train over time to become better and better at detecting activity.
Another question-are the individual sections welded together at the top? Should they be?