This Hardware Scaffolding is usually found in Construction and Entertainment Industry. 

It is heavy duty capacity and much more durable comparied with the aluminum trussing.

Its main tube is 48.3x3.2mm. The system is composed of Adjustable Feet, Horizontal Pipe, Vertical Pipe, Diagonal Pipe,ect.

In Entertainment Industry, It is usually combined with the common Stage Equipment, such as   Aluminum Lighting Trussing, Mobile Staging, Stage Lighting, Line Array,ect.

Main parts for the Ringlock Scaffolding:

The Pipes are the main parts for the Ringlock Scaffolding and beflow is information for them:

Testing the thickness with a tool:

Vivi Photos 

For Mobile Stages Structure

For Working Platform Tower Structure

For LED Screen Display and Stage Lighting Backdrop Structure

Combined with the Aluminum lighting Trussing and Mobile Staging together for Big Concerts

For Arean Seating Stage System Structure