New York subway construction: Fid-Bau Portal

New York subway construction

Griffin, J.H.

Mar 31 n 13 p 471-473: Uniform system in handling contract documents developed in 30 years of experience in subway construction; contract sections; contract documents; preparation; unit-price contracts; general contract provisions; comparison of stresses allowed by New York Building Code and those used in subway design by Board of Transportation; specifications. Apr 14 n 15 p 546-549: Underpinning of B.M.T. Centre St. loop at Delancey St. to permit passage of new Houston-Essex St. line underneath; pipe piles aggregating 5 mi were jacked down in order to support existing structure and to serve as foundations for new line; runner beams placed below B.M.T. invert; transverse beams placed later as part of new subway roof steel; drifting for excavation of gallery beneath subway invert. May 5 n 18 p 633-635: Underpinning elevated railroads; difficult task of supporting numerous elevated columns on Queens Plaza section handled by novel methods; addition of steel trusses to elevated railroads bents permits structure to be carried on two columns instead of four; permanent pipe-pile foundations; temporary pipe-line underpinning; pipe-pile towers for temporary support of columns later to be carried on subway roof.