FREE BOOKS

Author's List




PREV.   NEXT  
|<   7   8   9   10   11   12   13   14   15   16   17   >>  
he material, consisting partly of cellar earth, and partly of rock and earth excavated from other sections of the Pennsylvania Tunnel and Terminal Railroad, being brought on scows up the Hackensack and Passaic Rivers from New York City. The material was handled expeditiously from the scows by orange-peel buckets operated from the shore, deposited in standard-gauge dump-cars, and transported by locomotives at one time used on the elevated railroads in New York City. No excavation whatever was required on the Meadows Division or in the Harrison Yard. [Illustration: PLATE XVIII.--Details of Shelters and Platforms, Harrison Transfer Station.] [Illustration: PLATE XIX.--Details of Shelters and Platforms, Harrison Transfer Station.] The substructures for all the bridges, except the Hackensack River Draw-bridge, are of concrete, without reinforcement, heavy enough to withstand the ordinary earth pressure for the exposed height. With the exception of three bridges, foundations were built on clay and sand; these three, on account of excessive depth of soft material, were built on piles. In some cases loose stone was deposited back of the foundations for a width of 10 or 12 ft. after the mud had been removed. This precaution has prevented trouble due to the thrust of the high embankments on the saturated material. Masonry for all these bridges was constructed under contract dated August 21st, 1905, with McMullen and McDermott, of New York City. The superstructure consisted principally of half-through girders, floor of I-beams, filled solid with concrete, on top of which were placed five layers of Hydrex felt, and water-proofing compound, protected by a layer of sand and grouted brick from the stone ballast. The bridges over the New York Division passenger and Newark freight tracks of the Pennsylvania Railroad, and the main-line tracks of the Delaware, Lackawanna and Western Railroad, at the west end of the Meadows Division, are separated by 300 ft. of embankment. The skew angle is 9 deg., the total length of each bridge being about 450 ft. The floors consist of I-beams embedded in concrete. The Hackensack River Draw-bridge consists of six spans of deck plate girders, each 110 ft. long, and a draw-span 300 ft. long, operated by two 70-h.p. electric motors. The masonry was constructed under contract dated August 25th, 1905, with the Drake and Stratton Company, of Philadelphia; and the steelwork was furnished and erected
PREV.   NEXT  
|<   7   8   9   10   11   12   13   14   15   16   17   >>  



Top keywords:

bridges

 
material
 

Hackensack

 
concrete
 

bridge

 

Division

 
Railroad
 

Harrison

 

August

 

Illustration


Details

 
Shelters
 

Transfer

 

Station

 

constructed

 

girders

 

foundations

 
Meadows
 

tracks

 

contract


Platforms

 

operated

 

deposited

 

Pennsylvania

 

partly

 
layers
 
Hydrex
 

masonry

 
grouted
 

ballast


protected
 

proofing

 

compound

 

filled

 
McMullen
 

McDermott

 

superstructure

 

Company

 
Philadelphia
 

erected


furnished

 
steelwork
 

consisted

 

principally

 

Stratton

 
electric
 

consists

 
embedded
 

embankment

 

consist