Abstract: A support apparatus for supporting a glass unit in a window assembly including a support surface for holding and supporting the glass unit and a leg extending downwardly from the support surface for being received by the sash of the window assembly. Also, a window assembly including a sash, a glass unit, and a support apparatus. The glass unit of the window assembly rests on the support surface of the support apparatus and is attached to the corresponding hinge hardware, including the sash arm. By attaching the support apparatus to the sash arm, the sash does not have to act as a structural support and is less affected by deformation forces over time. The support apparatus may be made of a material having a coefficient of thermal expansion similar to that of glass, which helps to eliminate the problem of sash sag caused by deformation forces.