Concrete mix to be 6 bags of cement per cu. yd. with air entrainment. Concrete thickness to be a full 4″. Fiber expansion joints to be placed at abutments or any other necessary areas. Expansion to have a 3-1/2″ depth. Contraction joints will be placed every 4′ and have a 1″ depth. Steel rebar to run the length of the entire sidewalk.