The Classic Blockader barricades are manufactured from heavy duty 16 gauge steel. For weather resistance these barricades are protected by hot dip galvanizing. Uprights are fully inserted into the frame before welding providing maximum strength. Available base options are bridge feet for uneven surfaces such as grass or flat feet for smooth surfaces and where pedestrian traffic needs minimum trip hazard. These barricades interlock using a hook and loop fastening system that is compatible with the Standard Blockader so you can create a crowd control barrier of any length.