Unit. Expected Production Range (1) Concrete Masonry, Bridges (Foundation Substructure) CY/DAY. 13 - 39, 20 typ. Parapet LF/DAY; 45 - 120, 60 typ. Deck Placement (Girder Bridge) SF/DAY 360 - 4,900, 1,100 typ. Deck Placement (Slab Bridge) SF/DAY; 270 - 1,400, 700 typ. Precast Concrete Girder Erection; EACH/DAY 5 - 8, 6 typ. Concrete Masonry ...