Brackets provide additional support for large air conditioners or other heavy devices that can be mounted on modular enclosure sides. Support brackets fit between the frame and sides to provide two horizontal rigid supports. They can be positioned at v arious heights to accommodate any size air conditioner or device. Brackets can also be used between frames and tops for supporting heavy devices mounted on top of modular enclosures. Brackets are plated 14 gauge steel and are furnished in pairs. Hardwa re for mounting brackets is included.