The front and rear doors are fully ventilated with provisions for an optional top-mounted exhaust fan. The rack has multiple cable-access ports on the top and a large cable-access hole in the bottom. The top of the rack also has mountings for 12 and 18-in. wiring ladders, with grounding studs located in both the top and bottom. Panel-mounting rails have separate provisions for vertical cable management and four fully adjustable 19-in. panelwidth mounting rails per EIA-310 requirements. The Server Racks are 83.23-in. high 24-in. wide and either 35.43 or 43.31-in. deep. Panel space is 19 78.75 in. with inside depths to 41.82 in.