Iron truss bridges for railroads :
Merril, William Emery 1837-1891,
Iron truss bridges for railroads : Methods of calculating strains with a comparison of the most prominent truss bridges, and new formulas for bridge computations ; the economical angles for struts and ties / By wm. e. merrill - 2 - 130 páginas
Puentes
TG380 / M47 1870
Iron truss bridges for railroads : Methods of calculating strains with a comparison of the most prominent truss bridges, and new formulas for bridge computations ; the economical angles for struts and ties / By wm. e. merrill - 2 - 130 páginas
Puentes
TG380 / M47 1870