<p>This invention relates to a modular walling system. The system includes a plurality of primary structural members and securing means. Each primary structural member has a generally channel-shaped cross-sectional profile with an outer wall defining surface and two flanges extending away from the outer wall defining surface. The securing means is configured to retain pairs of primary structural members in a side-by-side relationship and secures adjacent flanges of respective pairs of the primary structural members such that the adjacent flanges are held together in secure face-to-face abutment.</p>
