Panel for Free-Stand Single- and Dual-Access Two-Door Enclosures with Mounting Channel. Panels can be positioned anywhere along horizontal mounting channels (see Sections B-B for limitations). Half-length panels can be located in the upper or lower portion of the enclosure. Some assembly is required. Center support is furnished with each full-length or half-length panel for two-door enclosures. The center support attaches to the top and bottom mounting channels and can be positioned from front to back in the enclosure. The center support can be replaced with heavy duty panel supports to support panels when heavy equipment is installed.