Perimeter fencing is perfect to keep the job site secure after hours. These fences are frequently made out of single vertical metal bars connected at the top and bottom with a horizontal bar. Sometimes they have spikes or barbed wire at the top to prevent unauthorized access. On site security is important for the well being of your project and workforce. Ensuring the site as clearly marked access points will help project managers as well as construction managers facilitate the delivery and movement of major materials coming to and leaving site.