adjustable screw jack steel in scaffolding

Product Description Please answer to my following questions before you order.Thanks
1) The thickness and size of the chassis
2) Welding configuration: welding processes are welding and friction welding.
3) rib: connecting portion screw and whether the chassis stiffeners, generally based on the requirements of the project, the longer screw backwater directly with stiffener shorter bottom bracket with a little.
4) the length of the screw, usually from 40-70, the thickness of the screw generally φ28, φ30, φ32, φ35.
5) entrusted with the adjusting nut can be divided into two processes: cast iron parts and stamping parts. Each model has a nut adjusting nut severity of the size of the points. Nut shape in two ways: bowl nut and wing nut.
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