Abstract: An improved frame for tents and structures comprising a generally circular base plate, a plurality of main frame support struts, each including a lower leg section, a generally upright center section, and an upper section such that each of the support struts is generally C-shaped in side elevational view and an indexing ring mounted on the lower face of the base plate which includes a plurality of lower leg section retaining notches circumferentially spaced around the indexing ring to releasably engage and retain the lower leg sections of the main frame support struts. Upper and lower strut connectors pivotably connect the upper ends and lower ends of the struts to one another. A generally circular frame extension ring engages retaining notches of the main frame support struts between the center section and upper sections thereof such that the base plate and frame extension ring retain the main frame support struts in an upright, circumferentially spaced orientation.