Abstract: A cover gripping assembly for securing a flexible cover to a side member of a frame. A marginal edge portion of the cover is frictionally gripped between the inner surface of an elongated channel member having an inwardly facing C-shaped arcuate sector defining an elongated cavity, and the outer surface of an elongated rod when the latter is received in the cavity. The outer surface of the rod is generally congruent with the inner surface of the C-shaped arcuate sector. The frictional gripping force of the gripping assembly on the cover may be enhanced when tension on the cover is increased by providing the channel member with an outwardly facing C-shaped channel member for causing a body portion of the cover to be folded back relative to the marginal edge portion of the cover. The inner surface of the inward C-shaped arcuate sector or the outer surface of the rod, or both, may be provided with a plurality of longitudinally-extending ribs for frictionally engaging the cover.