| 摘要 |
A scaffold comprises uprights and transverse tubular braces formed of aluminum. Each upright includes a tubular post extruded with external alignment grooves. Identical aluminum flange assemblies are spaced apart along the post. Each flange assembly includes an extruded sleeve with internal aligning ribs that interlock with the external grooves of the post, and a flange cast with internal ribs that interlock with external alignment grooves extruded with the sleeve. Flange decreases continuously from a central part to its periphery. A set of wedge-receiving openings is formed between the central part and periphery. A brace carries an aluminum connector having upper and lower sections that define a mouth for receiving the flange. An outer part of the mouth mates with inclined upper and lower surfaces of the central part of the flange. An inner part of the mouth remains clear of the flange so that shear forces and bending moments are applied by the brace to the thicker central part of the flange. The connector sections have aligned openings that register with an opening in the flange, and a wedge is inserted that secures the joint. |
