Abstract: The pad of the invention has a first set of spaced apart side members and a second set of spaced apart side members with the ends of adjacent members coupled together to form an opening between the four side members. Preferably the side members are formed of concrete. The side members have metal rods embedded therein with the ends of adjacent rods connected together. One or two parallel connecting members with metal rods may be connected to either of the two sets of side members in the opening or crossed connecting members with metal rods may be connected together and to the two sets of side members in the opening. In another embodiment the members of the pad may be formed of a hard plastic material or synthetic rubber.