Engineering and Contracting . ^r per lin. ft. Test discon- Length 8 ft. ^ ^^ <:s - Chanqe in Diamefen in insFig. 2. ing lbs,tinned. No. 994. Diameter 48 Heavy-weight pipe, 8,900 lbs. for 12ft. net length. Average thickness pipe was cut into two pieces and theend of one was loosely inserted in the bellat the middle of the testing box. The piececontaining the bell is denoted the bell sec-tion, and the other the spigot section. Thecenter of the loading apparatus was over ACOOOr. Chancie in Diameier^ in imFig. 3. Cm^.-ConZ-r of the bell is the cause of this
Engineering and Contracting . ^r per lin. ft. Test discon- Length 8 ft. ^ ^^ <:s - Chanqe in Diamefen in insFig. 2. ing lbs,tinned. No. 994. Diameter 48 Heavy-weight pipe, 8,900 lbs. for 12ft. net length. Average thickness pipe was cut into two pieces and theend of one was loosely inserted in the bellat the middle of the testing box. The piececontaining the bell is denoted the bell sec-tion, and the other the spigot section. Thecenter of the loading apparatus was over ACOOOr. Chancie in Diameier^ in imFig. 3. Cm^.-ConZ-r of the bell is the cause of this and that thickness in. Loaded 2 in. off center. the bell. The first crack appeared in thebell at the top and extended 2 ft. into thebarrel at a load of 47,200 lbs. per lin. the maximum load of lbs. per this crack extended the full length of thebell section. No crack appeared in thespigot. Test discontinued. The effect of lateral restraint is illus-trated in the results of a preliminary teston Pipe No. 990. In this test the hydraulicjack machine was not used, but I-beamswere used to transfer the load from the6oo,ooo-lb. testing machine to the saddle, 246 ENGINEERING-CONTRACTING \ol. XXIX. No. i«. since the box was too large to be placed bed of the machine. The distance ofthe saddle from the testing niachint: was:such that only one-fifth of the load on themachine was applied to the saddle. Theload was run up to 16,200 lbs. per lin. ft. onthe pipe. At tliis point an l-beani com
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
