div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentbridges1914-the-baltimore-ohio-railroad-the-pratt-truss-was-flrst-introducedhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: bridges1914 - The Baltimore Ohio Railroad …The Pratt truss was fLrst introduced Ln 1844 by Caleb Pratt as a mod Of the Howe truss In this type of truss the vert Ical web members loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentbridges1914-the-baltimore-ohio-railroad-the-pratt-truss-was-flrst-introducedhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: bridges1914 - The Baltimore Ohio Railroad …The Pratt truss was fLrst introduced Ln 1844 by Caleb Pratt as a mod Of the Howe truss In this type of truss the vert Ical web members loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentbridges1914-the-baltimore-ohio-railroad-the-pratt-truss-was-flrst-introducedhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: bridges1914 - The Baltimore Ohio Railroad …The Pratt truss was fLrst introduced Ln 1844 by Caleb Pratt as a mod Of the Howe truss In this type of truss the vert Ical web members loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...