Chicago : Engineering and Contracting Pub. Co. · leaf 196
ness is as it should be. in the center, andice the ends are arched and the thrusts arerected to the ends of the sides, that is theams, the assumption of the strains seems be reasonable. In a good many shafts steelinforcement has been used in the lining inft rock strata, for engineers are not sure… … U*— Doorway, Grade to Eing lio 30Draiu to Sump.
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
