Abstract: A panel member (110) is provided for a wall structure (105) including a first surface (112) and a second surface (114) spaced from the first surface, at least one rib member (116) extending between the first and second surfaces, a first end member (120) and a second end member (122) each extending between the first and second surfaces, substantially parallel with the at least one rib member, so as to form at least two channels (118) between the first and second surfaces. The first end member has a male connector (150) extending therefrom and the second end member has a female connector (152) formed therein. The male and female connectors are each configured to be complementary, such that the male connector of the panel member is able to be received within a female connector of another panel member to facilitate connection of adjacent panel members to form the wall structure.