. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . ^PiX \ A \X 2 \i ~^v /@y^-^ L?-i SILL 12x 12 L°-l ^ ^@\ 3 thick, 8^ Fig. 70. Fig. 69. wide, and 51 long. The mortise should be cuta little deeper than the tenon. Drip-holes*from the mortise to the outside will assist indraining off water that may accumulate in thejoint and thus prevent the rapid decay thatwould otherwise ensue. These joints are verytroublesome if a single post decays and requiresrenewal. It is generally required that the mor-tise and tenon should be thoroughly d
. Railroad construction. Theory and practice. A textbook for the use of students in colleges and technical schools . ^PiX \ A \X 2 \i ~^v /@y^-^ L?-i SILL 12x 12 L°-l ^ ^@\ 3 thick, 8^ Fig. 70. Fig. 69. wide, and 51 long. The mortise should be cuta little deeper than the tenon. Drip-holes*from the mortise to the outside will assist indraining off water that may accumulate in thejoint and thus prevent the rapid decay thatwould otherwise ensue. These joints are verytroublesome if a single post decays 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. §137. TKESTLES. 169
Size: 2124px × 1176px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913
