Frangible wedge shim for construction

A frangible, wedge shaped shim having a first broad face and a second broad face disposed at an acute angle to said first broad face, wherein said shim is formed from a rigid, frangible recycled plastic constituent material to include a solid first section and a relieved second section abutting said solid first section,

• wherein said relieved second section comprises that portion of the length of said shim wherein said scores formed in said first broad face overlie said recesses formed in said second broad face,
• said first broad face has a first exposed surface exposed to the exterior of said shim and bears a plurality of scores formed therein for breaking said shim selectively at any one of plural points, wherein said scores formed in said first broad face form a series of teeth each having a crest facing away from said shim, wherein said teeth are spaced apart from each other at regular intervals, wherein said teeth are dimensioned and configured such that said teeth interengage corresponding teeth of a similar second shim when the teeth of the second shim is placed against said teeth of said shim, when the second shim is inverted relative to said shim, and
• said second broad face has at least one recess formed therein at said relieved section, said recess having a second exposed surface exposed to the exterior of said shim on an opposite side of said first exposed surface,
• wherein a zone of solid, continuous said constituent material exists between said first exposed surface and said second exposed surface at said second relieved section, and said scores formed in said first broad face and said second exposed surface of said second broad face are dimensioned and configured such that said zone of solid constituent material has equal localized minimum thickness values disposed along said second relieved section.