![Strut Tube Connection Design Capacities 1 Strut Tube Connection Design Capacities](https://excel.civilmdc.com/wp-content/uploads/2021/12/Strut-Tube-Connection-Design-Capacities.png)
General Information. Tube Struts can be fitted between Purlins, Rails or Cee members and help resist the compressive forces exerted by the cold-rolled sections. There are 3 distinct types as shown in the diagram below. They are distinguished by the type of end connector. Types of Tube Struts.