Leadership

Structural Features Discussed by Edward Smulski, Consulting Engineer, New York City

Issue 22 and Volume 74.

Structural Features Discussed by Edward Smulski, Consulting Engineer, New York City The roof and bottom of the sedimentation basin, wash water basin and of a major part of the fresh water basin are of reinforced concrete flat slab construction. The columns are spaced 17 feet 6 inches on centers. The construction of the roof consists of a slab supported by columns with enlarged capital. At the column capital the slab is thickened by the introduction of a square drop panel. The bottom of the basin is of similar design. The capital however is replaced by a concrete block placed above the slab. The drop panel is placed under the slab to simplify the construction and to avoid formwork. The roof is designed to carry in addition to the weight of the slab a load of 340 lb. per sq. ft. The bottom is designed for an upward pressure equal to…

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