Abstract: Guide members and support members are provided for a frame construction of the type where the guide members are arranged to lie transversely between a pair of spaced, parallel, elongated support members and are provided with locating means at each end to cooperate with corresponding means on each of the support members, and with a slot to receive an edge of a board. Each support member is provided with a rib formation, and the end of each guide member has a corresponding groove formation, formed to provide a snap-on connection onto a rib on a support member. Complementary locating formations are provided at spaced positions along the rib formation and in each groove formation to prevent relative movement between the rib and groove formations in the longitudinal direction of the rib formation.