HORIZONTAL SURFACE • DICTIONARY ONE.COM • Definition of Horizontal surface

... on each side from side-dump cars standing on the track, and, falling between the risers for the duct steps, ran or was shoveled under the forms and down into the bottom. The horizontal surface on each side the center drain was smoothed off with a shovel. The workmen became very skillful at this, and got a fairly smooth surface. This concrete was usually placed in lengths of 45 or 60 ft. After setting for about 24 hours, ...

— Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 • James H. Brace, Francis Mason and S. H. Woodard

... his hands from the shell, and made a few steps. He trod upon a horizontal surface, but in putting one foot forward, he felt a slight incline. It seemed to him that he was about to slip downward! Instantly he retreated to the shell and clutched it in ...

— The Great Stone of Sardis • Frank R. Stockton