BeamClamp® Blind Rigging Clamps - BQRC050


The LNA Solutions BoxBolt® Rigging Clamp is a means of attaching an anchor point to Hollow Structural Sections (HSS) and other structural members when access is available from only one side.

The standard BoxBolt® Rigging Clamp utilizes Hot Dip Galvanized M12 size 1 BoxBolts® and a load ring welded to a custom fabricated anchor plate that allows for Safe Working Loads up to 5000 lbs.

The BoxBolt® Rigging Clamp is easily installed by Drilling a pre-determined set of 13/16” holes into existing steelwork, lining up the anchor plate with the newly drilled holes, inserting and tightening the LNA Solutions BoxBolts® to the specified torque values. There is no more need for site welding, tapping, or strapping.


  • Blind Connection rigging and lifting points can be individually designed for each application and carry a wide range of load capacities (Up to 30 kips)
  • Although LNA Solutions guarantees the Safe Working Load of the BoxBolt® Connection, we are not responsible for the structural integrity of the existing steelwork. We recommend that a Licensed Structural Engineer be consulted to establish the capacity of the existing structural member.

Technical Specifications

Diagram - Blind Rigging Clamps (Blind Connections or HSS)
Diagram - Blind Rigging Clamps (Blind Connections or HSS)
Product Code Outer Ply
Hole Size Safe Working
Loads (lbs.)
(ft - lbs)
Dimensions Thickness
BQRC050-V 1/8” - 1/2” 13/16” 5,000 59 3-1/2” 7-3/4” 5-1/4” 1/2”
BQRC050-H 1/8” - 1/2” 13/16” 5,000 59 3-1/2” 7” 4-1/2” 1/2”