For single and multiple bay configuration installs requiring additional weight capacity and extended depths, AtlasIED offers the 14-gauge frame construction of the 744-25. The 744-25 is 22 1/2" wide, 25" deep, and has 44 vertical panel spaces.Multi-formed and welded frame members provide superior strength and load bearing capability. Base is constructed of double-formed front and rear sections, MIG welded and reinforced with 11-gauge CRS corner caster gussets. Vertical columns interlock with frame top and base adding double material thickness for superior load bearing capability. Mounting rail channel support members are multi-formed and MIG welded for superior interlocking support. Panel mounting rails are fully adjustable front to rear.Base includes four 3/8"-16 threaded sockets to accept leg levelers (Models LL-1) and four 11-gauge CRS corner gussets that are punched to accept casters. Base also has provisions to be permanently secured to the floor.Shipped with 2 pair of 11-gauge CRS adjustable mounting rails. Rack rails are precision tapped 10-32 and recessed 1 3/16" (30mm). These plated rails include convenient RU indicator hash marks to aid in equipment alignment. Rails are standard E.I.A. 5/8"-5/8"-1/2" spacing.Hat sections are on 19" panel spacing to accommodate vertical accessory mounting.This cabinet sports a solid secure professional look without punched vents. Therefore, thermal air-flow design may be precisely designed and maintained without the fear of contaminants or other foreign/damaging objects entering through vents.With the addition of optional Seismic Bracket, SBK-700, 700 Series Racks can be certified in accordance to the Telcordia NEBS (Network Equipment Building Systems) GR-63-CORE standard. When the SBK-7-- brackets are properly installed, the 700 Series successfully endured the rigorous real-world dynamic test - the racks are able to withstand up to a zone 4 earthquake which is comparable to Richter magnitude 8.0!