beams 128 are installed creating the ceiling attachment assembly to which the ceiling or next story will be secured is shown referring to fig1 an interior view of a corner bracket 132 is shown installed in the corner where two ceiling beams 128 meet the corner bracket 132 is formed with at least two orthogonal faces that meet flanges 118 shown in fig1 13 and holes 134 sized to receive hardware 136 shown in fig1 hardware is notionally a bolt capable of being driven by tool 107 maintaining the simplicity of construction additionally holes 134 in corner bracket 132 can either be intemally threaded or alternatively be equipped with cage nuts connected or otherwise formed to the interior of the corner bracket 132 in an embodiment just as tabs 130 assist in supporting the floor panels 112 of the second story or ceiling of the first story the tops of corner bracket 132 are formed to assist in the support of the same referring to fig1 a perspective view of the top of a corner bracket 132 is shown as installed between two ceiling beams 128 hardware 136 is more clearly shown here as it is inserted to secure the components together referring now to fig1 the beginning of installation of the second story floor of the rhu 100 is shown with the addition of a first floor panel 102 floor panels on a second story of an rhu 100 do not physically attach to the ceiling beams 128 but.