MRK-4436 Rear Door: Included, Rack Style: 10-32 Threaded Narrow Design for Large-Scale Multi-Bay Jobs. Features: -Fully welded construction, open sides -UL Listed in the US and Canada -2,500 lb. weight capacity -Seismic certified (UBC 1997 & CBC 1998 Zone 4; IBC 2000, IBC 2003, ASCE 7 - 02, NFPA 5000 Seismic Use Group III) for protecting 1000 lbs. of essential equipment when used in conjunction with our MRK-Z4 brackets -Slim 22" OD width -Available in 4 depths: 26.5", 31.5", 36" & NEW! 42 " -2 pairs of wider rackrail provide more interior room -Laser-cut 1/8" thick internal steel braces for strength -14-gauge steel tops & bottoms, 16-gauge seamless steel sides -Grounding and bonding stud installed in base -Configurable open top accepts a number of top options -Keylocked solid rear door standard -Finished in a durable black textured powder coat -36" Outside Depth (33.6" Useable) Helpful Hints and Advice Rack Style Useable Rackspaces Useable Height Overall Height Useable Depth Outside Depth Power Strips Rear Door Included 10-32 threaded 44 space 77" 83 1/8" 36" 33 1/2" XL, L, S YES 10-32 threaded 44 space 77" 83 1/8" 36" 33 1/2" XL, L, S NO Square hole (cage-nut style) 44 space 77" 83 1/8" 36" 33 1/2" XL, L, S YES Square hole (cage-nut style) 44 space 77" 83 1/8" 36" 33 1/2" XL, L, S NO