Abstract: Fabric restraining cables are anchored at opposite ends to a concrete ring of a roof structure. Each cable has a plurality of bearing plates spaced longitudinally therealong and secured to the upper portion thereof by U-bolts. Clamp mounting base plates also secured at one end by the U-bolts span the spaces between pairs of the bearing plates. Each base plate has a pair of lower clamp plates secured respectively along opposite edge portions thereof. Each lower clamp plate has an upper clamp plate secured thereto and clamping a beaded edge portion of a fabric panel along with upper and lower gaskets therefor. In several embodiments, each upper gasket is extended transversely outwardly from the cable, looped back over the respective row of upper clamp plates, and releasably joined to the opposite extended and looped back upper gasket to provide a joint cover between the opposite fabric panels.

Abstract: A liquid binder forming material is added to a preform mold, dispersed chopped glass fiber strand is allowed to free fall into the preform mold to build up a layer of chopped fibers wherein substantially all of the strand is horizontal but otherwise randomly oriented, and the layer of chopped strand is forced down into the resin until completely immersed therein. Preferably, thereafter, the preforms so produced are stacked into tubular magazines with separator sheets between the preforms in each magazine; and the magazines are transported first to a maturation room where the viscosity of the binder forming material is increased to above 20 million centipoise, and then to matched metal dies where the preforms are sequentially fed out of the magazine to between the dies which shape and cure the preforms.