Canadian engineer . struction called for the useof a minimum of steel, and since practically no skill wasneeded beyond the ability to drive nails, the flume could bebuilt by lumberJAcks quite as well as by carpenters. Theone question in doubt was that of the possibility of con-structing- a naiJed joint sufficiently strong to withstand thehydrostatic pressure. It vvas to determine this point thatthe tests, the results of which follow, were run. Purpose of Test.—To ascertain the transverse holding[ower in pine lumber of nine-inch spikes (4j4 to the pound),and in particular to find the permissibl
Canadian engineer . struction called for the useof a minimum of steel, and since practically no skill wasneeded beyond the ability to drive nails, the flume could bebuilt by lumberJAcks quite as well as by carpenters. Theone question in doubt was that of the possibility of con-structing- a naiJed joint sufficiently strong to withstand thehydrostatic pressure. It vvas to determine this point thatthe tests, the results of which follow, were run. Purpose of Test.—To ascertain the transverse holding[ower in pine lumber of nine-inch spikes (4j4 to the pound),and in particular to find the permissible load on a nailedjTint as used at lower corner of a corn crib flume of con-structon as shown in Sketch No. i, and to find what nailingwiill give maximum strength for such a joint, that is, to finda railin-j- with which failure will be equally likely to occurby cracking of the timbers or by drawing of the nails. Three characteristics of any timber joint of great im-portance are : Itj ^^ ~^^r????-•• fi-. tial that the plant should be constructed with the utmostspeed, it uas desired to cut to a minimum the use of steel,concrete or other bulky materials requiring to be brought infrom the railroad. It was, moreover, desirable to use nonebut the simplest timber construction on account of the diffi-culty of turning out carefully sized lumber from a temporarysawmill, and also because it was the intention to avoid labortrouble by using lumberjacks rather than carpenters for thebulk of the work,—an obvious impossibility on work demand-ing car ful framing. A rock filled corn crib and stop log dam and timberpower house would satisfy conditions both in the matter ofconstruction and material, but the flume ofTered standard types demanded a great deal of steel in theform of bolts and tie rods and the use of these bolts androds demanded a fair average degree of skill, in the gangserecting the work. Finally, after .getting out several de-signs, that shown in Fig. No. 2
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
