Carpentry. [cf. COCK v.3 which appears to be the original form of this word, the present form being app. due to association with the cogs of a wheel, and with COG v.1, to which this has a superficial appearance of relationship of sense.]
To connect timbers by means of a ‘cog’; cf. COCK v.3 Hence Cogging vbl. sb.
1823. P. Nicholson, Pract. Build., 129. Cocking, or cogging, is the form of the joints, which the tie-beams and wall-plates make with each other.
1854. Archit. Publ. Soc. Dict., s.v. Caulking, Caulking, Calking, or Cocking, Cogging, or Corking. The act of securing a piece of timber across another, the lower having a projecting tenon, with a corresponding notch or mortice in the timber. Ibid., s.v. Cog-hold, A cog-hold is best obtained through the agency of a chair of cast iron, which should be itself cogged or joggled to a stone template laid in the wall under it.
