Architectural engineering. With special reference to high building construction, including many examples of Chicago office buildings (1895)
Freitag, Joseph Kendall · New York, J. Wiley & sons; [etc., etc.] · leaf 218
-rock the rock surfacewas dressed and stepped as required, and the chambersand shafts were then rammed with concrete, composed of1 part Alsen cement, 2 parts sand, 4 parts broken stone.The superimposed piers were built of hard-burned bricklaid in cement mortar. About eight days were requiredto sink… … 200 ARCHITECTURAL ENGINEERING. proper concentric bearings over the caisson piers. Fromthese bearings the load was distributed over the wholemasonry-work by means of large steel bolsters, thus
Building, Iron and steel
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