Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 208
MASONRY AND REINFORCED CONCRETE 159 Since a culvert always implies a stream of water which will have ascouring action during floods, it is essential that the side walls ofculverts should have an ample foundation, which is sunk to such adepth that there is no danger that it will be undermined. There…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.