Abstract: A seat arrangement has a support surface for the buttocks, and a support or bearing surface for the knees and the shins, the two surfaces being connected to one another via a common framework. The framework has a base portion, which extends beyond the downwardly extending projections of the support and bearing surfaces. The base portion is a substantially continuous frame. The seat arrangement also has a base support consisting of two halves, each possessing an interior recess or sleeve for surrounding the respective metal tube of the other half of the base portion for fitting the two halves together.