. Electric railway review . ^i^tst « Ocean Shore Railway—Outlet of Drainage Tunnel Around Fill, Also Showing Farm Under Crossing at End of Fill. coast, it was impracticable to use the third-rail type of dis-tribution because of the scale which would be formed on thesteel by the heavy salt air. For this reason the catenary typeof overhead construction was adopted. The two trolley wireswill be supported by wooden center poles, except in the fewmiles of track laid in paved streets in San Francisco, whereornamental steel poles will be employed. The wooden poles, 30 feet long, will be fitted w
. Electric railway review . ^i^tst « Ocean Shore Railway—Outlet of Drainage Tunnel Around Fill, Also Showing Farm Under Crossing at End of Fill. coast, it was impracticable to use the third-rail type of dis-tribution because of the scale which would be formed on thesteel by the heavy salt air. For this reason the catenary typeof overhead construction was adopted. The two trolley wireswill be supported by wooden center poles, except in the fewmiles of track laid in paved streets in San Francisco, whereornamental steel poles will be employed. The wooden poles, 30 feet long, will be fitted with 8 foot6 inch iron brackets, bearing stay rods and insulator pins. and will distribute the current to nine substations. Anaccompanying illustration reproduced from a line drawingshows the floor plan and sections of a typical transmission line will be somewhat shorter than the trackbecause several large curves in the track will be avoided byrunning the pole line directly over the hills. A very complete block signal sys
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
