. Electric railway review . of the wood treating plant be inperfect condition, so that the timber is thoroughly sterilized,and then a proper penetration of the creosote is timber being sterilized, all outer cells are covered orfilled with an insoluble body, preventing access of air or waterto the interior. The cost of treating ties with the straight creosote pro-cess varies slightly, but will average about 30 cents per tie,-whereas the zinc process will not be over 6 cents per tie. With regard to trolley poles, some progress has ben madein preservation, but only to a very limited e
. Electric railway review . of the wood treating plant be inperfect condition, so that the timber is thoroughly sterilized,and then a proper penetration of the creosote is timber being sterilized, all outer cells are covered orfilled with an insoluble body, preventing access of air or waterto the interior. The cost of treating ties with the straight creosote pro-cess varies slightly, but will average about 30 cents per tie,-whereas the zinc process will not be over 6 cents per tie. With regard to trolley poles, some progress has ben madein preservation, but only to a very limited extent. Mr. Crumpof the firm of Ford, Bacon & Davis makes a statement regard-ing creosoted trolley poles, which is to the effect, that theyare in a much better conductor than the ordinary wood polewithout treatment. He says, In our regular work, we doubleInsulate all our spans in the same manner that we wouldfor steel pole construction. He further says, that the light-ing company of Memphis, Tenn., does not use creosoted. Stftnn o( \^ Wood MoiilO 11 1 beloM Wood every 5 lonsths of 2 .\ to suit section of mould in large enough quantities for anything but a short piece otroad. A good cedar post 7 feet long, with top 414 to 5 inches,on the other hand, is always quite readily obtained and willgive very good service. Concrete for ties, poles, and posts, has been proposedand used to a limited extent by a few. My own idea is, thatconcrete is not very well adapted for railroad ties, but I seeno reason why it should not be a success in trolley poles orfence posts. I submit herewith a drawing of a proposedreinforced concrete trolley pole, which I hope to see used toa very large extent within the next few years. The greatestobjection to this concrete pole is its weight, but it can be setwith a derrick or pole-setting device; and I believe will bebrought within reasonable cost. Concrete posts have beenused to quite an extent, and are no longer an experiment.
Size: 1960px × 1275px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
