. Electric railway journal . AT LEFT, STUB TOWER FOOTINGS PROTECTED BY CON-CRETE CASTINGS (Note how protection has been broken; thisis the chief difficulty with this type of footing-), AT RIGHT,HEAVY TUBULAR POLE WITH ROD GUYS, PENNSYLVANIARAILROAD, PHILADELPHIA ELECTRIFICATION making towers, and at least one company specializingin them, there is less occasion for insisting on highfactors of safety than was the case a few years the designs have been so rationalized thatit is possible to get a fair idea of the probable be-havior under load. Practically any reputable concernwhich
. Electric railway journal . AT LEFT, STUB TOWER FOOTINGS PROTECTED BY CON-CRETE CASTINGS (Note how protection has been broken; thisis the chief difficulty with this type of footing-), AT RIGHT,HEAVY TUBULAR POLE WITH ROD GUYS, PENNSYLVANIARAILROAD, PHILADELPHIA ELECTRIFICATION making towers, and at least one company specializingin them, there is less occasion for insisting on highfactors of safety than was the case a few years the designs have been so rationalized thatit is possible to get a fair idea of the probable be-havior under load. Practically any reputable concernwhich has had considerable experience in building tow-ers can furnish either directly or with very little modi-fication, a stock design which fully meets require-ments. For this purpose a broad specification of theservice required is necessary, including in this dataas to the loads to be sustained and whether pin or sus-pension-type insulators are to be used. In the lattercase particular attention must be given to insure thatther
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
