Knot (woodworking)

Definition and stakes

G. Griffin Lewis,  The Practical Book of Oriental Rugs

“ It is so secure that it is impossible to remove it by pulling either end of the knot. This differs from the domestic method in which the pile is merely drawn between the warp threads without tying or fastening. In the finer fabrics of the East the knots are so close that it requires careful examination to discover them except in very old rugs where the pile is worn down, then the knot is distinctly seen.
In some parts of Persia the best artisans are men but in most other sections the weavers are mostly women and children.
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Source: Gutenberg

Knotting and splicing ropes and cordage (1907)

“ When this knot is quite snug down in its place, take about one-third of the yarns out of the ends with which the knot was made, and tuck the remaining two-thirds under two strands, missing [Pg 95] one (see Fig. 121, where the arrow D shows how to tuck the end A, and arrowhead C shows where end B will come out) . Now halve these ends, and, leaving one-half, tuck the other as before; work them in nice and snug, put the grommet on a good stretch, and trim off the ends. If the work is well done no joint should be noticeable. ”
Source: Gutenberg

Samuel J. Record,  The Mechanical Properties of Wood

“ The weakening effect is much more serious where timber is subjected to bending and tension than where under compression. The extent to which knots affect the strength of a beam depends upon their position, size, number, direction of fibre, and condition. A knot on the upper side is compressed, while one on the lower side is subjected to tension. The knot, especially (as is often the case) if there is a season check in it, offers little resistance to this tensile stress. ”
Source: Gutenberg

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