Non-metal structural barriers, barricades, impediments, and prefabricated walls; stackable structural barriers, stackable barricades, stackable impediments, and stackable prefabricated walls; non-metal interlace-able or interlock-able structural barriers, interlace-able or interlock-able barricades, interlace-able or interlock-able impediments, and interlace-able or interlock-able prefabricated walls; non-metallic reinforcements used for strengthening and reinforcing concrete structures, name...