Concrete in the country / [American Cement Company]. (1910)
American Cement Company · Association of American Portland Cement Manufacturers · leaf 97
98 under all conditions of wear and exposure have been so often mentioned, itseems useless to refer to them again* Remove the old wooden floor, first placing props to support the porch roof,with their lower ends resting outside the line of the porch floor. The pillarsthemselves must also be…