. The street railway review . on are the colunmsand the method of supporting the beams on tliem. The colunms I»U- niori- slri-iijilb llian round ones turned from the same limbers,but the latter are more generally used as they obstruct the light is generally considered the IksI practice to iMirc a hole about Ij-iin. in diameter from end lo end. lbroii);b the ceiUer of all cohumis AiG. JO. 1903.] STREET RAILWAY REVIEW. 459 and to connect this with halt-inch holes through the sides at eachend so as to prevent nndue checking while drying. Both ends of the coUnnns are caretiiUy cut oflf. Th
. The street railway review . on are the colunmsand the method of supporting the beams on tliem. The colunms I»U- niori- slri-iijilb llian round ones turned from the same limbers,but the latter are more generally used as they obstruct the light is generally considered the IksI practice to iMirc a hole about Ij-iin. in diameter from end lo end. lbroii);b the ceiUer of all cohumis AiG. JO. 1903.] STREET RAILWAY REVIEW. 459 and to connect this with halt-inch holes through the sides at eachend so as to prevent nndue checking while drying. Both ends of the coUnnns are caretiiUy cut oflf. The bottoms ofthe lower columns rest on cast iron plates, which are generally seton brick or concrete foundations, and the tops of the columns havecast iron caps. These caps furnish supports for the floor or roofliniliers above, and also for the pintles on which rest the colunnisof the story. It is necessary to use pintles as the columns am^ ^//^•Sf ^/u//// free ffse// fro/77I /Ae u/a// u/fM(^i/i^pt/////7^ ura//i4////^. CAST \V.\1,L PI,.\TE TO SUPPORT FLOOR TIMBER. themselves cannot go down through the floor, for if they did, when-ever the floor was wet, water would run down along the soon cause the lower ends to decay. Different shapes are usedfor pintles, but generally they are either circular or cross shaped insection. The top of the pintle is formed into a plate that gives abearing for the base of the above. Sometimes the and bases arc all cast in one piece; if this is not done thejoints where they come together should be faced off so that a truebearing perpendicular to the of the column may be given wher-ever there is a joint. The length of the column caps varies with the -/i Ai\^, r--^ %v \ >
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
