. Scientific American Volume 86 Number 05 (February 1902) . the configura-tion of the river bottom. These trusses could be incor-porated with the structure of the tube by tying themto the shell by means of connecting plates at theflanges of the tube, and by means of castings, J, overthe piers, which castings would support the bridgegirders and also the tube. The piers, E, would besunk from the tube itself by the pneumatic process,and they would be of any form of construction thatwas found most suitable. Probably they would bewrought iron shells tilled with concrete after the planfollowed so la
. Scientific American Volume 86 Number 05 (February 1902) . the configura-tion of the river bottom. These trusses could be incor-porated with the structure of the tube by tying themto the shell by means of connecting plates at theflanges of the tube, and by means of castings, J, overthe piers, which castings would support the bridgegirders and also the tube. The piers, E, would besunk from the tube itself by the pneumatic process,and they would be of any form of construction thatwas found most suitable. Probably they would bewrought iron shells tilled with concrete after the planfollowed so largely in bridge foundations. In this con-struction- the truss would perform the work of carry-ing the moving load, or the truss and the shellmight be so constructed and connected as to sharein the work, or the shell itself might be so modifiedas to perform the double function of shell and due course we hope to publish working plans ofthis system as applied in the construction of thePennsylvania-Long Island tunnel. Manifestly the ©
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