University of Vigo

Removable system for continuous connection of square tube profiles

Posted by University of VigoResponsive · Patents for licensing · Spain

Summary of the technology

The removable system allows mounting on each profile separately, joining then in continuity with plates at the head of each of the flanges. The use of anti-buckling clamps prevents local buckling of the walls of the profiles, associated with tightening of flanges. Flanges have nerves to reduce stresses. The same flanges are valid for connecting different sized sections of square tube profiles.

Description of the technology

System for removable junction of square tube profiles with continuity. The ends of both profiles are joined by a system of eight flanges with bolts and nuts. The set allows clamping each profile separately, and subsequent continuity of both profiles once put together. Actual section dimensions of both profiles may not be exactly equal. The system also includes a mechanism that prevent local buckling of the tubular profiles walls.


The system consists of a total of eight ribbed flanges per joint. Each flange is in contact with the corresponding corner of each square tube profile to be joined. Thus two groups of four flanges are formed. Each of these groups is coupled to the end of each tube, by a set of 12 bolts and nuts. The groups of flanges are joined by head plates with 3 bolts and nuts by side, allowing the connection between the tubes.

Main advantages of its use

  • This detachable connection allow reconfiguration and reuse of parts in metal structures made of square tube, which represents an economic and environmental advantage.
  • The system allows to save time in the assembly process.
  • The assembly is not dependent on environmental conditions, such as welding.


  • Industrial assemblies
  • Metal structures
  • Steel constructions

Related keywords

  • Jointing (soldering, welding, sticking)
  • Construction Technology
  • Management of construction process & life
  • Materials, components and systems for construction
  • Construction maintenance and monitoring methods & equipment
  • Construction methods and equipment
  • Installations related to construction (energy, lighting, …)
  • Iron and Steel, Steelworks
  • Metals and Alloys
  • Lightweight construction
  • Speciality metals (including processes for working with metals)
  • Machine tools, other metal working equipment (excluding numeric control)
  • Construction and Building Products
  • Engineering and consulting services related to construction
  • Manufacture of construction materials, components and systems
  • Construction companies
  • Removable connections
  • metal structures
  • detachable structures
  • recycling structures
  • square tube profiles.

About University of Vigo

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