Abstract: A portable barrier wall used for preventing the passage of people, vehicles, projectiles, blast debris, liquids, wind or waves through the wall. The wall is constructed of one or more x-shaped freestanding support structures arranged in parallel orientation to form a frame for holding retaining members that attach to the support structures. The retaining members form U-shaped containment structures within each segment of the wall. Fill material is added to the containment structures which are then sealed. Connecting means attach the two support structures together to prevent movement. Wall used to contain liquids may additionally include a liquid impervious layer that is placed external to the retaining member on the side of the barrier wall that will be in contact with liquid and the layer is anchored under the feet of one of the support structures. The wall may additionally hold absorptive or adsorptive materials to contain spills and contaminants.

Abstract: A portable barrier wall used for preventing the passage of people, vehicles, projectiles, blast debris, liquids, wind or waves through the wall. The wall is constructed of one or more x-shaped freestanding support structures arranged in parallel orientation to form a frame for holding retaining members that attach to the support structures. The retaining members form U-shaped containment structures within each segment of the wall. Fill material is added to the containment structures which are then sealed. Connecting means attach the two support structures together to prevent movement. Wall used to contain liquids may additionally include a liquid impervious layer that is placed external to the retaining member on the side of the barrier wall that will be in contact with liquid and the layer is anchored under the feet of one of the support structures. The wall may additionally hold absorptive or adsorptive materials to contain spills and contaminants.

Abstract: A freestanding fence supported on x-shaped posts or x-posts that sit on top of the ground. Two tubes are welded together at approximately a 55 degree angle to form each x-post. The legs of the x-posts are provided with adjustable length feet and with receivers for holding electrical or non-electrical fence wires. Universal joints secure horizontal members between adjacent x-posts. The universal joints secure to a pair of ears proved on each leg of the x-posts. An adjustable height footed vertical support member can be installed on each horizontal member approximately midway between the adjacent x-posts. The fence is constructed of easily transported and assembled pieces that can be disassembled, moved, and then reassembled as often as needed. Once assembled, the fence is strong and stable and can be used to mount various types of equipment such as lighting, security, camera, motion detection, solar panels, radio frequency identification devices, etc.