Erection of the Leas Highway Bridge near StJoseph, Ill. . the joint u„ the portion of the top chord U,U,was raised from itsplace and then lowered to the floor. Although a resolution of forc-es would show no stress in U,Utafter the member 11,11,was removed,still by an arch action it carried nearly all of its former stress,and when it was removed the point L,deflected about three inches,owing to the vertical component of the additional thrust in UtL,.This additional thrust was not great enough to cause serious damageto the falsework. The end post was next laid upon the falsework,two men easily r
Erection of the Leas Highway Bridge near StJoseph, Ill. . the joint u„ the portion of the top chord U,U,was raised from itsplace and then lowered to the floor. Although a resolution of forc-es would show no stress in U,Utafter the member 11,11,was removed,still by an arch action it carried nearly all of its former stress,and when it was removed the point L,deflected about three inches,owing to the vertical component of the additional thrust in UtL,.This additional thrust was not great enough to cause serious damageto the falsework. The end post was next laid upon the falsework,two men easily removing it by hand. Then the corresponding memberson the other end of this truss were removed in the same manner, asalso the two remaining diagonals. After the other truss had beendismembered, the pieces were moved to the end of the bridge by theuse of a dolly and placed out of the way. (The dolly is fully shownin Pig. 6, page 8 ) The derrick was then taken to pieces. Noth-ing remained above the gangways at this time to interfere with the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1903
