Walk Thru Frames Detailed Introduction Walk thru frame is a type of frame scaffolding system, which mainly includes main frames, cross braces, guard rails, etc. It can also be used with accessories such as base jack, closed steel plank, scaffolding ladder, etc. Closed steel plank can be fixed on the walk thru frame scaffold for workers to walk, screw jack is used to adjust the balance of walk through scaffolding frames, ladder and guard rails allow workers to reach the specified height safely. This type of walk through scaffolding is very popular in the United States and can be used in various types of construction and maintenance work.