a rigid bar 150 is rotatably attached to at 152 to the edge of wall panel 24 the bar 150 is detachably connected at 154 to the wall panel 22 thus the assembly 20 is maintained at an increased transverse dimension essentially the length of bar 150 during the period of time in which it is transported from place to place thereby giving stability to the assembly 20 during the movement thereof the method of assemblying and using the portable room structure is clear from the foregoing description the assembly 20 in the folded position shown in fig1 is displaced from a storage position in the storage configuration to a predetermined room site 52 in a larger space desirably the wall panel 24 is anchored using an anchor device such as that illustrated in fig9 thereafter the wall panel 22 is displaced away from the wall panel 24 simultaneously unfolding the panels 26 through 29 to assure that the assembly 20 will not inadvertently fold anchor structure such as the bolt illustrated in fig8 secures the position of the panels 26 27 and 28 29 the room assembly 20 is then in the unfolded position illustrated in fig3 it is observed that seals will then exist on all of the vertical joints of the room assembly due to the compression of tubular insulators 32 see fig8.