Stud for construction of seismic and fire resistant shaft walls

A stud for construction of seismic and fire resistant shaft walls comprising:

• a vertical web;
• an anterior flange no less than 4.12 centimeters wide extending transversely from said vertical web possessing a distal portion, an exterior side, and an interior side;
• a posterior flange no less than 6.35 centimeters wide possessing a distal portion, an exterior side and interior side extending transversely from said vertical web substantially parallel to said anterior flange;
• said posterior flange extends further from said vertical web than said anterior flange thereby defining a substantially “J-shape” cross-section;
• an anterior stiffening lip depending perpendicular from the distal portion of said anterior flange toward the posterior flange;
• a posterior stiffening lip depending perpendicular from the distal portion of said posterior flange toward the anterior flange;
• a plurality of horizontal slots spaced vertically apart and substantially parallel to one another incorporated along the vertical length of said posterior flange to slidably attach wallboard material thereto.