the application discloses a belt formed of first and second portions of thermoplastic sheet including , respectively , first and second pluralities of tabs spaced apart so as to define first and second pluralities of openings along corresponding first and second edges of the first and second portions of thermoplastic sheet , wherein the first plurality of tabs are joined to the second plurality of tabs so as to join the first edge to the second edge . also disclosed is a method for forming a belt of a thermoplastic material , including forming angles on a first edge of a first portion of thermoplastic sheet and on a second edge of a second portion of thermoplastic sheet , forming first and second pluralities of openings , respectively , in the first and second portions of thermoplastic sheet , placing together the first and second edges such that they overlap , and joining the first and second portions of thermoplastic sheet together .