20 of fig1 for storage the first step consists of pushing panels 22 and 24 towards panels 28 and 26 respectively about their hinged connections so that panel 22 collapses upon panel 28 and panel 24 collapses upon panel 26 then the two panels 22 and 28 are folded so as to be collapsed upon the two panels 24 and 26 to form a stack of four panels as shown in fig3 a in the second step the structure 20 is then twisted and folded to collapse the frame members 40 and panels 22 24 26 28 into a smaller shape in particular the opposite border 70 of the stack of panels 22 24 26 28 is folded in see arrow 72 in fig3 a upon the previous fold to further collapse the frame members 40 with the panels as shown in fig3 b the folding is continued so that the initial size of the structure 20 is reduced until the frame members 40 and panels are collapsed on each other see fig3 c to provide for a small essentially compact configuration having a plurality of concentric frame members 40 and layers of the panels 22 24 26 28 so that the collapsed structure 20 has a size which is a fraction.