. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools. By Walter Loring Webb . TYPES OF PLATE GIRDER BRIDGES. C. M. & RY.(Dec. 1895.) TYPE •£ GIRDER 25 FEET AND UNDER,. (To face page 219.) § 195. CULVERTS AND MINOR BHTDGE8. 219 • great compensations for the expense of the construction andmaintenance of these structures. The construction is sometimesmade by placing two pile trestle bents about 6 to 8 feet apart,supporting the rails by stringers in the usual way, the specialfeature of this construction being that the embankments
. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools. By Walter Loring Webb . TYPES OF PLATE GIRDER BRIDGES. C. M. & RY.(Dec. 1895.) TYPE •£ GIRDER 25 FEET AND UNDER,. (To face page 219.) § 195. CULVERTS AND MINOR BHTDGE8. 219 • great compensations for the expense of the construction andmaintenance of these structures. The construction is sometimesmade by placing two pile trestle bents about 6 to 8 feet apart,supporting the rails by stringers in the usual way, the specialfeature of this construction being that the embankments arefilled in behind the trestle bents, and the thrust of the embank-ments is mutually taken up through the stringers, which arenotched at the ends or otherwise constructed so that they maytake up such a thrust. The designs for old-rail culverts andarch culverts are also utilized for cattle-passes when suitable andconvenient, as well as the designs illustrated in the followingsection. 195. Standard stringer and I-beam bridges. The advantagesof standard designs apply even to the covering of short spanswith wooden stringers or with I beams—especially sincethe methods do not require much vertical space between therails and the
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