Polymer construction studs and sheathing

A building construction system, comprising:

• a building construction stud, a building construction sheathing panel, and a plurality of fasteners affixing said building construction sheathing panel to said building construction stud, said building construction stud comprising:
• a plastic contiguous stud outer wall defining a stud length, stud width, stud depth, stud cross-section transverse to said stud length, a longitudinal axis, a width axis, a depth axis and a stud interior, said stud interior contained substantially within said plastic contiguous stud outer wall, said plastic stud outer wall having
• a planar first sheathing face parallel with said stud outer wall longitudinal and width axes,
• a planar sheathing second face distal to and parallel with said planar first sheathing face,
• a planar stud first side wall parallel with said stud outer wall longitudinal and depth axes,
• a planar second side wall distal to and parallel with said planar first side wall, and
• at least one void space longitudinally extensive parallel with said plastic contiguous stud outer wall and contained substantially within said stud interior,
• wherein said plastic stud outer wall length is greater than said plastic stud outer wall depth, said plastic contiguous stud outer wall cross-section defines a rectangle, and said plastic contiguous stud outer wall depth is greater than said plastic contiguous stud outer wall width;
• a plurality of longitudinally extensive stud wall ribs protruding internally from said planar first sheathing face, said stud wall ribs configured to increase stiffness and strength, and also configured to enhance fastener engagement;
• and
• at least one fastener anchoring and structurally reinforcing member contained substantially within said stud interior;
• said plurality of fasteners penetrating each of said building construction sheathing panel, said planar first sheathing face, and said plurality of longitudinally extensive stud wall ribs, and thereby affixing said building construction sheathing panel to said building construction stud.