. Railroad construction. Theory and practice . Fig. 70. 3 thick, 8 wdde, and 5^ long. The mortise should be cuta little deeper than the tenon. ^Drip-holesfrom the mortise to the outside will assist indraining off water that accumulate in thejoint and thus prevent the rapid decay thatwould otherwise ensue. These joints are verytroublesome if a single post deca3s and requiresrenewal. It is generally required that the mor-tise and tenon should be thoroughly daubedwith paint before putting them together. This will tend tomake the joint water-tight and prevent decay from the accu-mulation and
. Railroad construction. Theory and practice . Fig. 70. 3 thick, 8 wdde, and 5^ long. The mortise should be cuta little deeper than the tenon. ^Drip-holesfrom the mortise to the outside will assist indraining off water that accumulate in thejoint and thus prevent the rapid decay thatwould otherwise ensue. These joints are verytroublesome if a single post deca3s and requiresrenewal. It is generally required that the mor-tise and tenon should be thoroughly daubedwith paint before putting them together. This will tend tomake the joint water-tight and prevent decay from the accu-mulation and retention of water in the joint. (b) The plaster joint. This joint is made by bolting andspiking a 3Xl2 plank onboth sides of the joint. Thecap and sill should benotched to receive the are greatly facili-tated by the use of thesejoints. This method has beenused by the Delaware andHudson Canal Co. [R. R.]. (c) Iron plates. An iron plate of the form shown in Fig. 72. Fig. 71. f §137. TRESTLES. 159 Fig. 72 (a). Bolts passing
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Keywords: ., bookauthorwebbwalt, bookcentury1900, bookdecade1900, bookyear1903
