William A. Radford · Radford Architectural Company · leaf 47
e minimum thick-ness to be used for covering embeddedmetal. It cannot be denied that concreteis incombustible, but that it will not dis-integrate under stress of great heatcannot be maintained. The New Yorkbuilding authorities have made four-teen tests on concrete constructions, sevenof which… … part vm. Sidewalks, Pavements and Floors. Foundation. The first step in makingconcrete sidewalks is the excavation of theground and preparation of the surface byramming for the reception of the stone,gravel or cinders. In localities where thefrosts are heavy the ground should be ex-cavated to a…
