(1) to heavy scaffold should have a clear understanding, generally if the thickness of the floor more than 300 mm, should consider the design according to the heavy scaffolding, if scaffolding load more than 15 kn/was, should organize expert argumentation.

To separate the parts of the steel tube length changes on bearing, for the upper free length should be considered a form scaffolding should not be too long, generally less than 500 mm advisable (in the new specifications may be revised), poling calculation generally on the top step and the largest stress at the bottom step, should be regarded as the main computing point. When required by the bearing capacity of discontent group should add stud reduce interval.

(2) the present domestic scaffolding tube shelf common materials such as steel, fasteners, jacking and tap to be of poor quality, in the actual construction failed to consider the theoretical calculation. The construction of the lever is missing, not connected, sweeping stem from two vertical and horizontal distance is too big or too small, etc.

Scaffold board list, insufficient thickness, overlap does not meet specification requirements; Large formwork dismantling thick inside not for network between rod and wall body; Bracing in plane not continuous; Open the scaffold not brace; Scaffold board under the small bar spacing is too large; Even the inside and outside wall pieces do not rigid connection; Protective railings spacing greater than 600 mm; Fastener connection is not tight, fastener slip, etc.

Use rack scaffolding tube the note

1, regularly remove accumulated in the scaffolding tube dangerous parts of the materials, brick, concrete block and sundry; And on the shelves on the tube material should have certain limit, can't overload pile up