Camp gates were designed to prevent the rush of an attack force. Techniques to prevent this usually involved a ditch in front of the gate or an angling the wall at the gate formed into a curve. Roads in the camp were 18 meters wide which was also the distance from the rampart to the first tent line.
Camp structures were sized according to importance of the occupant. The commander occupied the Praetorium (part of the principia), while the tribunes had their own barracks. The legionnaires slept in leather (calf or goat) tents designed to be waterproof. Each tent was ten feet square and housed eight men. Each century had eight tents for eighty men since sixteen were always on guard duty. Centurions had their own larger tent.