Demountable building

Claim 1

A demountable building comprising a plurality of longitudinally spaced transversely arranged arch frame members, each having a pair of opposite feet; a ground base for each foot of said arch frame member; fixed anchor bolts projecting upwardly from said ground base; a plate with a spaced pair of understanding lugs between which the arch frame foot is firmly bolted, said plate having elongated slots to accommodate said upwardly projecting fixed anchor bolts whereby said plate is adjustably mounted on said ground base allowing limited movement of the arch foot relative to the ground base in a direction longitudinally of the building; covering in the form of individual elongated fabric strips stretched between each adjacent pair of said arch frame members; releasable means securing the opposite edges of said individual fabric strips to said respective pairs of members; and extendable means interposed between each pair of said members for individually adjustably spreading the same to individually stretch the intermediate fabric strip; the longitudinally sliding movement afforded the arch frame member foot with respect to its ground base being limited to that allowed it on the spreading action of said extendable means by the width of the tautly stretched fabric strip; wherein opposite sides of each of said elongated fabric strips have a rope enclosed therein to provide thickened, beadlike edges for respective attachment to the outer sides of an adjacent parallel pair of relatively movable arch frame members; each said fabric strip securing means disposed on the outer side of an arch frame member comprising an inwardly facing channel having a base and shallow sides, lag screws through the base of said channel securing it to and adjusting it toward and away from said arch frame member, and spacing washers on said screws between the channel and arch frame member being of greater length than the depth of the channel sides whereby the channel shallow sides, terminating short of the arch frame member, releasably capture the confronting beaded edges of an adjacent pair of elongated fabric strips; and extendable means interposed between adjacent arch frame members for individually adjustably spreading the same consisting of a number of vertically spaced jack screws each consisting of a hollow female tube, an extendable male rod slidable therein, a nut on said rod bearing against the open end of said tube, said tube and rod each having a drilled flange on its remote end whereby they are secured to confronting sides of adjacent arch members, on such tube and one such rod being removably connected in back-to-back relationship on opposite sides of an arch member by a common set of nuts and bolts wherein the bolts extend through the respective drilled flanges and the intermediate arch member.