Ribs placed in halves by special crane with universal jaw; cost said to be less than usual methods of lining.
Precast concrete units used for relining railroad tunnels
Eng. News-Rec.
Engineering News-Record ; 90 , n 15
1923
2 pages
3 Figs.
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Relining Pacific coast railroad tunnels with concrete
Engineering Index Backfile | 1921
A variety of precast concrete units are used on railroads
Engineering Index Backfile | 1925
|Monobar precast concrete units (Italy).
Online Contents | 1994
|Engineering Index Backfile | 1942
|Pipe tunnels under railroad tracks
Engineering Index Backfile | 1930
|