DF3139 Features: * 14-guage steel tops and bottoms, 16-guage seamless steel sides and 11-guage thickness where the rail brackets are welded to the sides, each model is equipped with laser cut 1/8"" thick internal braces made from structural steel which enhance strength and provide more useable internal space * Numbered rackspace increments speed equipment mounting * Less rear door * Front and side ventilation locations optimize convection * Cable pass-through located in the face of the standard front and rear adjustable 11-guage, 10-32 threaded, extra-wide rackrail facilitate the passing of cable from the face of equipment to the rear * Removable rear plates allow cable bundles to be easily passed over or under the WRK-SAs standard key-locking rear door * Seismic Certified to satisfy the Uniform Building Code seismic zone 4 upper floor requirements for protecting 1,000 lbs. of essential equipment with optional WRK-Z4 mounting bracket * Grounding/bonding stud in base of rack facilitates the proper grounding and bonding of electronic equipment, as per NEBS and NEC standards * UL Listed in the US and Canada Includes: * 1/2"", 3/4"", 1"", 1-1/2"" electrical knockouts found on removable rear plates, top knockout plate additionally includes UHF/VHF antenna knockouts Construction: * Fully welded construction provides a 2,500 lb. weight capacity Color/Finish: * Finished in a durable black textured powder coat * Configurable open top accents a number of options for thermal management Dimensions: * Overall Depth:27 1/2""D * Useable Depth: 25 3/4"" D * Racking Height: 77"" H (44 space) * Overall Dimensions: 83 1/8""H x 24 1/4""W x 27 1/2""D * Useable Depth: 30 3/4"" D * Racking Height: 77"" H (44 space) * Overall Dimensions: 83 1/8""H x 24 1/4""W x 32 1/2""D