The Roof, side panels and front and rear doors are grounded to the frame of the enclosure. Eight additional electrical grounding inserts are located on the frame for external grounding. Enclosures are shipped standard with both leveling feet and castors. Leveling feet can be quickly adjusted through the use of a screwdriver or drill, eliminating the need to reach underneath with a wrench. A proven frame design, heavy-gauge mounting rails, and heavy-duty casters provide for 3000lb (1364kg) static (levelling feet) and 2250lb (1023kg) dynamic (castor) load ratings. Enclosures have been tested and approved to be combined with proper bolt down accessories to meet various seismic requirements. Split rear doors improve access and serviceability to rear of rack mounted equipment. The split rear doors help to maximize floor space. Only 11 inches (279mm) of clearance is required behind the enclosures to allow for door swing. Enclosures with shock packaging are standard enclosures with provisions in the packaging design and enclosure assembly for shipping the enclosures with equipment mounted inside. Extensive industry experience with the leading IT manufacturers and most recently certified with Cisco® for pre-racking and shipping Cisco unified computing systems (UCS).