Page 139 - Mario Bigon "The Morrow Guide to Knots"

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is not suitable for large- or medium- two overhand knots slide together
diameter rope and, in fact, the knot (4). After the knot is made, one end
is not as strong as the rope itself should lie above the knot and one
when there is great strain. below.

Method
Lay the ends of two cords parallel to
one another and make an overhand
knot in one end around the other
cord (1). Repeat this operation with
the end of the other cord (2, 3). Pull
the two standing parts so that the