How to inspect the embedded ring of I-beam for cantilever scaffolding? Remember these 4 readings, all indicate the source of the reference.
1.
Look at the spacing between the embedded rings, which should be 20cm,.
How to inspect the embedded ring of I-beam for cantilever scaffolding? Remember these 4 readings, all indicate the source of the reference.
1.
Look at the spacing between the embedded rings, which should be 20cm,.