. The street railway review . fk;. I 12-FT. sr.\N DiRiNu constriition. stresses The steel rods arc embedded near the inner surface ofthe arch at the crown and near the outer surface at the haunches,crossing the arch rib at or near the points where the bendingmoments are at minimum. The steel, in other words, lies near thetension edge of the arch, reinforcing the concrete at those pointswhere the tension due to live loading would tend to crack tin- concrete. , Since the points at which the series of rods should cross the archrib cannot be determined with accuracy, alternate rods are sobent as t
. The street railway review . fk;. I 12-FT. sr.\N DiRiNu constriition. stresses The steel rods arc embedded near the inner surface ofthe arch at the crown and near the outer surface at the haunches,crossing the arch rib at or near the points where the bendingmoments are at minimum. The steel, in other words, lies near thetension edge of the arch, reinforcing the concrete at those pointswhere the tension due to live loading would tend to crack tin- concrete. , Since the points at which the series of rods should cross the archrib cannot be determined with accuracy, alternate rods are sobent as to cross the ribs at different points. Thus the end rod, cross the arch rib at a given point, the second rod will crossat a point lower down, and the third rod at a higher point, the fourthrod parallel to-the l^rst again, the fifth parallel to the second. ,-.^. ir-e- •■ KIG. 3. 12-FT. SPAN ON 45 DEGREE SKEW. round slccl proniplly in iho open niarkcl, while an order for cor-rugated or twisted bars involves
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
