EIA compliant 19" equipment rack shall be Middle Atlantic Products model # SCRK-4427BK . Overall dimensions of rack shall be 81.9 " H x 22" W x 27" D. Useable height shall be 44 rackspaces. Rack shall be of fully welded construction. Weight capacity shall be 2,500 lbs. Rack shall be constructed of the following materials: top and bottom shall be 16-gauge steel, horizontal braces shall be 16-gauge steel welded to integral structural side panels of 16-gauge steel giving an 1/8" thick structure, all structural elements shall be phosphate pre-treated and finished in a durable textured black powdercoat. Rack shall come equipped with two pairs of fully adjustable 11-gauge steel rackrail with tapped 10-32 mounting holes in universal EIA spacing with black e-coat finish and numbered rackspaces. Rack shall include solid sides with vertical slotted vent pattern at top and bottom and laser knockouts for ganging and cable pass-through. Top and bottom of rack shall feature vertical slotted vent pattern. Rack shall have a removable split rear knockout panel with 1/2", 3/4", 1", and 1-1/2" electrical knockouts installed in base. Grounding and bonding stud shall be 1/4-20 threaded, installed in base of enclosure. SCRK Series enclosures shall satisfy the 1997 UBC and 2001 CBC Seismic Zone 4 and the 2000 IBC, 2003 IBC, 2002 ASCE Standard 7 and NFPA 5000 Seismic Use Group III lateral force requirements for protecting 750 lbs. of essential equipment in upper floor installations when used in conjunction with the SC-Z4 seismic floor anchor brackets with an Ip value of 1.5. Rack shall have detachable frame that allows for off-site integration. Rack shall be UL Listed in the US and Canada. Rack shall be warranted to be free from defects in material or workmanship under normal use and conditions for the lifetime of the rack.