What a distribution center perimeter actually has to do
A distribution center perimeter has three jobs: keep unauthorized people away from loaded trailers, keep truck traffic separated from employee and visitor traffic, and never become the reason a dock door sits idle. Trailer and cargo theft is an opportunistic crime, so the perimeter is judged on how long it delays someone and how clearly it channels vehicles.
The failure mode we see most often is a single fence line and a single gate serving every kind of traffic. Tractors, employee vehicles, visitors and waste haulers all queue at the same opening, the gate is propped open during shift change because it cannot cycle fast enough, and the perimeter stops existing for eight hours a day.
- Trailer yard. The highest-value zone. Loaded and drop trailers sit unattended for hours. This line gets the taller fabric, the topping and the camera-friendly geometry.
- Employee and visitor lot. Separated from the trailer yard with its own access, so a car never needs to cross the truck court and a driver never parks against a trailer row.
- Truck court and maneuvering apron. Fencing set back far enough that a tractor can jackknife into a door without clipping a post. Corner posts here take the most abuse of anything on the site.
- Yard partitions. Internal fencing that separates carriers, holds impounded or claims trailers, or fences a returns and salvage area.


