div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb 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 src=https:reader034fdocumentsinreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb 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 src=https:reader034fdocumentsinreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb 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 src=https:reader034fdocumentsinreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 4button div class=trans-image amp-img class=trans-thumb alt=Page 4: 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 src=https:reader034fdocumentsinreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 5button div class=trans-image amp-img class=trans-thumb alt=Page 5: 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...