Note 61 — PART I SPECIFICATIONS FOR STREET ROADWAY PAVEMENTS (continued 2)
Reading edition
Some engineers advocate a greater total thickness of the pavement than is here specified (6 inches). Considering that this pavement should never be used on heavy traveled streets, a total thickness of concrete of six inches will have ample strength to carry the loads to which it will be subjected. If so, it is a useless waste of money to increase the thickness of the concrete.