[f. TOP v.4 + -ING1.] The twisting of the strands over a top (TOP sb.2 3) in laying a rope. Topping sledge, the loaded sledge or carriage to which one end of the strands is attached in laying, which advances as they are shortened by twisting.
1825. J. Nicholson, Operat. Mechanic, 438. The forward movement of the stranding, topping, and dragging sledges, is that slow progressive movement necessarily required … by the shortening or shrinking up of the strands in twisting,… and of the strands and cordage, either common or patent, whilst hardening and topping.
