The Atlas Sound FMA44-36G (gangable) was designed with contractor input to meet storage and wire management needs for today and into the future. The unit features increased width for better wire management, and includes rear door. Construction for tops/bottoms/frames is 14 gauge steel. Hat sections provide rail slots and retainer holes for extra strength and two pairs of 12 gauge CRS adjustable mounting rails plated, drilled and tapped 10-32 with hash marks to indicate rack unit increments are included. Holes for optional surface doors are pre-drilled with threaded inserts factory installed to allow doors to be mounted after equipment is loaded.