Measurement of a hold based on volume calculated from distance from ceiling to lower edge of beams, distance between inner edges of opposite frames, and length.
Umlinganiselo wolawulo osekelwe kumthamo obalwe ukusuka kumgama osuka kumgangatho ophezulu ukuya kwisiphetho esisezantsi somqadi, kumgama phakathi kweziphetho ezingaphakathi zezakhelo ezimeleneyo kwakunye nobude.