Abstract: A relocatable storage tank for flowable materials such as liquids and granular materials comprises a bag of flexible material and has a generally square, rectangular, or circular shape, resting on a solid surface, together with at least one central post which supports the upper portion of the bag, wherein the post aids in carrying the weight of the flowable materials to the ground, thereby reducing the associated mechanical tensions in the fabric of the flexible material.

Abstract: A relocatable storage tank for flowable materials such as liquids and granular materials comprises a bag of flexible material and has a generally square, rectangular, or circular shape, resting on a solid surface, together with at least one central post which supports the upper portion of the bag, wherein the post aids in carrying the weight of the flowable materials to the ground, thereby reducing the associated mechanical tensions in the fabric of the flexible material.

Abstract: A relocatable storage tank for flowable materials such as liquids and granular materials comprises a bag of flexible material and has a generally square, rectangular, or circular shape, resting on a solid surface, together with at least one central post which supports the upper portion of the bag, wherein the post aids in carrying the weight of the flowable materials to the ground, thereby reducing the associated mechanical tensions in the fabric of the flexible material.

Abstract: A frame structure comprises a plurality of parallel, spaced apart, arched frame assemblies composed of pairs of frames. This enables existing frame members to be used for longer spans and/or stronger structures. The pairs of frames are connected together at spaced apart positions. Conveniently the connections between frames occurs adjacent to the ends of sections forming the frames and a combined arrangement can be used for connecting frames and joining sections. Fabric panels extend between the frames of a pair and between pairs of frames. The panels have integral tensioning means. The frames are pivotally fastened to ground support means.

Abstract: A viewing structure comprising a plurality of parallel arched frames, pivotally mounted at their ends on the ground, each frame having a front portion, a top portion and a rear portion. The front portion is generally arcuate, with straight top and rear portions joined by a further arcuate portion. The top portion inclines upward and rearward and support pillars are mounted on each top portion, spaced apart along the top portion. Seating members are mounted on the pillars and flooring members are provided between the pillars. The spaces between arches can be filled by fabric panels. The clear space beneath the structure can be used for food concessions, washrooms and other uses.

Abstract: An openable closure, for example for entry to a building structure, has a plurality of arched frames pivotally mounted on the ground at each end, with fabric panels extending between frames. The first or outermost frame extends outwardly close to the ground, the next frame inclined upwardly at an intermediate position. The ground attachment positions of the first frame are positioned forward of and outward of the attachment positions of the next frame, with the first frame being longer than the next frame. The first frame can pivot up and over the next frame, with the fabric panel passing over the next frame. A similar arrangement can be provided for the next frame relative to a further frame, if provided.

Abstract: A frame supported structure with fabric panels is formed from a plurality of spaced arched frame members pivotally attached at their lower ends to ground plates. The ground plates are fixed in position prior to erection of the frames. The frames have open slots on each side into which slide beaded or roped edges of the fabric panels. The frames can be erected from or near ground level, and then the fabric panels pulled in along the slots, from ground level. Cranes or scaffolding are not required. After the panels are in position they are tensioned, as by inflating inflatable sections extending for the length of a panel.

Abstract: Skirt segments for a segmental skirt of an air cushion vehicle can be removed and replaced without getting under the vehicle hull, by providing a rod or tube at each top edge of a segment, the inner ends of the rods or tubes being inserted into sockets on the vehicle bottom surface. The outer edge of the skirt segment, and the outer ends of the rods or tubes, are held against the vehicle structure by a clamping member. A tool can be provided which attaches to the outer ends of the rods or tubes to assist in removing or replacing a segment, the tool removed before applying the clamping member.

Abstract: To reduce the amount of water or other surface material issuing at the periphery of an air cushion vehicle, a flexible barrier is suspended at the vehicle periphery lateral to the cushion containing means--usually a flexible skirt. The spray or other material is trapped between the vehicle periphery and the barrier, with water or other material dropping down and air venting through apertures at the top of the barrier. Weight can be added to the lower part of the barrier to assist in maintaining the barrier down.

Abstract: An air cushion vehicle has a plurality of webs extending out between adjacent skirt members, with a solid or tubular peripheral member attached to the web members at their forward parts. The web members and the peripheral member guard the skirt against damage by debris, such as ice. The webs tend to ride up over an ice edge, while ice floes or similar objects are deflected by the peripheral member. The peripheral member can be in the form of a blade to cut off humps of ice on the top of an ice sheet or floe.