div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-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 members src=https:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 10button div class=ts-image amp-img class=ts-thumb alt=Page 10: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails10jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 11button div class=ts-image amp-img class=ts-thumb alt=Page 11: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails11jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 12button div class=ts-image amp-img class=ts-thumb alt=Page 12: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails12jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 13button div class=ts-image amp-img class=ts-thumb alt=Page 13: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails13jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 14button div class=ts-image amp-img class=ts-thumb alt=Page 14: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails14jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 15button div class=ts-image amp-img class=ts-thumb alt=Page 15: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails15jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 16button div class=ts-image amp-img class=ts-thumb alt=Page 16: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails16jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 17button div class=ts-image amp-img class=ts-thumb alt=Page 17: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails17jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 18button div class=ts-image amp-img class=ts-thumb alt=Page 18: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails18jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 19button div class=ts-image amp-img class=ts-thumb alt=Page 19: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails19jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 20button div class=ts-image amp-img class=ts-thumb alt=Page 20: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails20jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 21button div class=ts-image amp-img class=ts-thumb alt=Page 21: 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:reader034vdocumentsusreader034viewer20220422115eb3270a41db6443191e8c27html5thumbnails21jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 22button div class=ts-image amp-img class=ts-thumb alt=Page 22: bridges1914 - 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