. Canadian forest industries July-December 1912. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. CANADA LUMBERMAN AND WOODWORKER 43 Fig. 1 shows the plan of a portion of stairs using a cut and mitered outside stringer with treads having their ends mitered for return nosing. The lower part gives a detailed working drawing. Fig. 2 is the ground plan. According to the ground plan there will be thirteen straight steps and one bull nose step; likewise four- teen straight risers and one bent riser. Referring to Fig. 1 the pitch is seen to be 7 by 10 inche
. Canadian forest industries July-December 1912. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. CANADA LUMBERMAN AND WOODWORKER 43 Fig. 1 shows the plan of a portion of stairs using a cut and mitered outside stringer with treads having their ends mitered for return nosing. The lower part gives a detailed working drawing. Fig. 2 is the ground plan. According to the ground plan there will be thirteen straight steps and one bull nose step; likewise four- teen straight risers and one bent riser. Referring to Fig. 1 the pitch is seen to be 7 by 10 inches so that the net width of the riser according to this detail will be 7 inches. The back edge of the tread is rabbeted so that a 5/16 inch projection fits into the groove of the riser and the nose projects past the riser for V/& inches. Therefore, the total width of the tread will be 11 7/16 inches. The tread finishes 1 1/16 inches thick; the riser y± or 13/16 inch and the cove is No. 8060, by }& inch. Now these treads must be mitered for the return nosing, which will be the same width as the front projection, or 1 x/% inches. Referring to the ground plan. Fig. 2, it is seen that the right hand side going up is the end to be mitered for the return nosing. Then this end of all the treads should be trimmed square and one tread laid off and adjusted in the form. Fig. 3, for cutting the miter. This form can be clamped on a sliding table trim-saw or a universal saw with gage running in a groove. Anyway it must be on a trim-saw that can be adjusted for depth of cut. After all are mitered they may be, by the use of a stop block or gage, trimmed up on the dotted line, see Fig. 3, as far as a circular saw will go without cutting past the miter, then finished with a hand-saw. Now they arc ready for dovetailing. Plan in Fig. 1 shows three balusters per tread, so lay off one ac- cordingly. There are different methods of dovetailing treads, necessar- ily so on account of different
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforests, bookyear1912
