Two-Post Extension Support Bracket RDAB Series

400 lbs (181 kg) Weight Capacity

In the past, mounting deep equipment to a 2-post rack was a major challenge. Deep equipment, when not properly supported can sag and cause damage to the equipment housing. The RDAB is similar to a 2U shelf but allows the rack equipment to be positioned in the center of the rack. This helps stabilize the rack while using less space than having equipment mounted behind. 


  • Constructed in 14-gauge steel.
  • Available in four (4) depths.
  • Angles mount to 19-inch, 23-inch and 24-inch EIA rack mounting rails. 
  • Ideal for mounting a UPS, Server, Switch, NVR and other rack-mount equipment.
  • Mounts to the front and/or rear of the rack for maximum load rating.
  • Finished in RAL9005 black powder paint.
  • Includes all four (4) pieces shown as well as mounting hardware.
  • Tested to nearly double the suggested load rating of 400 lbs (181 kg).
  • TAA-compliant for GSA Schedule purchases.
  • RoHS Compliant.
  • Manufactured in North America.



Part No. Overall Dimensions Rack Mounting Dimensions
Height Width Depth Height Width Depth
(Per Bracket) Units (Including Standard Rack)
RDAB2U15 3.50 1.57 6.00 2U 3.50 19.00 15.00
RDAB2U20 3.50 1.57 8.50 2U 3.50 19.00 20.00
RDAB2U26 3.50 1.57 11.50 2U 3.50 19.00 26.00
RDAB2U31 3.50 1.57 14.00 2U 3.50 19.00 31.00
Qty Included Description Replacement Part No.
2 Left bracket
2 Right bracket
4 10-32 x 0.625in screw
1 Installation instructions

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Data subject to change without notice.

Tags: 4-Post Adapter