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Cradles were designed for the support of the 48-in. and 24-in. water mains, resting on the transverse girders, and the 48-in. cast-iron sewer on the east side of the avenue was carried on I-beams bracketed to the ends of the transverse girders, as shown on Figs. 1 and 2.
The 48-in. brick sewer was broken, and the sewage was pumped across the excavation. The overhead girders "B" were then put in place, and two of the girders "C" were used as temporary shoring girders at each column.
The central portion of the viaduct was then erected, and, using concrete piers and timber bents, all structures were placed on its deck. During the latter part of 1908 a 48-in. cast-iron water main was laid by the city on a cradle built by the Railroad Company on girders "C" on the east side of the avenue.
All structures were left in place with the exception of the pipes, most of which were temporarily cut out. The 48-in. brick sewer in the center of Ninth Avenue was broken, and the sewage was pumped across the excavation through a smaller pipe.
These girders were located so that a cradle could be laid on them east of the elevated railway structure to carry a proposed 48-in. cast-iron water main. Girders "B." Eighteen of these girders were required, each weighing about 6,000 lb. The total weight, including the elevated railway structure, surface railway structure, pipes, etc., supported during the work, amounted to about 5,000 tons.
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