Erectable shelter frame structures including a plurality of rib assemblies. Preferably, each rib assembly has a receptacle for receiving a respective end of a purlin arrangement, the other end of which is attached to a receptacle of a subsequent rib assembly. The joints are formed by toggle clamps that assist in facilitating the ease by which the shelter structure can be assembled or disassembled. Methods of construction and disassembly of the shelter frame structure are also disclosed.