The fence gets hit, and that has to be in the design. A perimeter on a live logistics site takes impact as a matter of routine — reversing trailers, swinging loads, plant working close to the line. Heavier posts and correct footings are what let a run take that and stay upright, and chain wire's genuine advantage here is what happens afterwards: a damaged bay is cut out and replaced quickly and cheaply without rebuilding the run. That is worth more on an operating site than a marginally cheaper install.
High-security perimeters get specified up, not just taller. Where a site holds high-value stock, plant or regulated materials, height is only one lever. A reduced mesh aperture defeats finger and toe holds. A bottom rail or buried mesh stops lift-and-crawl entry — which is how most yard entries actually happen, rather than over the top. Anti-tamper fixings and welded-through posts matter on exposed runs. And a clear zone either side keeps the line visible to cameras and patrols, which is the part most often given away to storage creep within a year of the fence going in.
Toppings are a decision to make with advice, not by default. Barbed wire on cranked extension arms and razor tape are both available and both change the character of a boundary. They also carry safety and liability considerations, particularly where a boundary is close to a public area, and what is permitted is a question for your council and your insurer about your specific site rather than something a fencing contractor decides. Ask the question before you specify the topping, not after it is installed. On many industrial boundaries the honest answer is that barbed wire on the rear and side runs plus a tighter mesh aperture does the job that razor tape was being asked to do.
