Abstract: A frame (101) for at least partially enclosing or supporting a panel (190) is provided. The frame may include at least a first frame section (201-1) including a bottom flange (104) provided at a base of the frame section. A frame sidewall (103) may be provided at an outer portion of the frame section, the frame sidewall characterized by a height H extending from the bottom flange (104). A panel containment structure (101-1) may be provided at an upper portion of the frame sidewall (103), the panel containment structure including a lower shelf (105) extending from the frame sidewall. A support wall (431-1) may be provided at an inner portion of the frame section (201-1), the support wall extending (i) between the bottom flange (104) and the frame sidewall (103). (ii) between the bottom flange (104) and the lower shelf (105), or (iii) both (i) and (ii).