Architect and engineer . are often installedwith both ends rigidly embedded in con-crete, and with no special provision inthe way of expansion joints. Experiencedemonstrates that the expansion and con-traction accompanying summer and win-ter conditions is perfectly accommodatedby the corrugations, and that no damageis to be feared in the form of looseningor fracturing at the piers or abutments. In regions where the winters are se-vere, it often happens that a corrugatedpipe is full of water at the time of a hardfreeze and this water soon becomes asolid block of ice. Other forms of pipeare almo
Architect and engineer . are often installedwith both ends rigidly embedded in con-crete, and with no special provision inthe way of expansion joints. Experiencedemonstrates that the expansion and con-traction accompanying summer and win-ter conditions is perfectly accommodatedby the corrugations, and that no damageis to be feared in the form of looseningor fracturing at the piers or abutments. In regions where the winters are se-vere, it often happens that a corrugatedpipe is full of water at the time of a hardfreeze and this water soon becomes asolid block of ice. Other forms of pipeare almost certainly ruptured if this oc-curs, but here again the corrugated formproves a safety device, allowing the pipeto expand sufficiently to care for the in-creased volume of its contents. At leastone instance is known of a corrugatedpipe which has been frozen solidly in thisway every winter for seven or eightyears, and which is still in good condi-tion. For like reasons, the heaving of the THE ARCHITECT AND ENGINEER 129.
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