Download 1 Download 2 Original Resolution: 771x1390 Economic Papers T Of Concrete About 6 Inches Thick In Small Concrete Culverts The Footing Is Frequently Made Solid Across The Entire Bottom Ofthe Culvert As In Plate X The Bottom Serving https www alamy com economic papers t of concrete about 6 inches thick in small concreteculverts the footing is frequently made solid across the entire bottom ofthe culvert as in plate x the bottom serving both to distribute theload and prevent scour in larger structures a cut off wall as shown inplate xiy is often used when no provision is made to prevent scourthe side walls should be not less than 18 inches below the bed of thestream 2 frost while a serious matter farther north seldom penetratesdeeper than 6 inches in this state any footing carried below the sur face of the ground 12 inches is image370599787 html