The design of the Chicago and Northwestern Railway train shed (1909) (14760601102)

Identifier: designofchicagon00hill (find matches)

Title: The design of the Chicago and Northwestern Railway train shed

Year: 1909 (1900s)

Authors: Hillman, Frank William

Subjects: Chicago and North Western Railway Company Engine houses (Railroads) Railroads Theses

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Contributing Library: University of Illinois Urbana-Champaign

Digitizing Sponsor: University of Illinois Urbana-Champaign

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own by hatchure, (Pig. 2). There being a continuous stretch of steel for nearly threeblocks it was necessary to make a very accurate survey of the streetsThis was done by running a base line along Clinton Street. The in-tersection of this line with all the street lines were determined andthe intersection angles very carefully read by repetition; eight successive readings being taken. The measurements were made directly on the sidewalks, no plimbing up at ends of chain being done, andcorrected for slope and temperature, the tape also being stretchedto a pull of ten pounds. This survey is shown in figure 3, Later all of this survey was referred to co-ordinate axes assumed northand south and east and west. The work of the entire project waslikewise referred to these axes which were so placed that everythinglies in the first quadrant. This makes it possible to easily findthe relation of points with the aid of analytical geometry. 25*-6 v/as settled upon as being the most economical length

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for the longitudinal spans, the 12center is the minimum spacingfor centers of passenger tracks, the 12»-6 spacing is used in fourinstances to give room for belt conveyors betv/een the tracks forconveying mail from the mail coaches to the incoming mail room,6»-0 is the standard spacing center toc enter of stringers so thisdetermined the 18»-0 spacing, it being a.multiple of 6 and making itpossible to have some uniformity in the transverse floor beams. Theoriginal alignment of the streets had tobe maintained, and as noneare at right angles to each other, odd and diverging bays or spanshad to be placed adjoining each street and skewed bents put in. With the above mentioned spacing determined, t he layout of thesteel work for the office use was simple and resulted as shown inPig. 2. Then the steel v;ork was designed and the calculations ofloads on columns determined so that the foundations could be design-ed. The outline of this thesis, however, will be according to themethod of constr

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the design of the chicago and northwestern railway train shed 1909 book illustrations railroad industry railroads industrial history science theses geometry high resolution

1909

University of Illinois Urbana-Champaign

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