Modular panel wall structure

Modular wall panel having an inside planar face outside and comprising

• a supporting skeleton of stiles, rails, and mullions of substantially uniform hollow rectangular section each having a major axis and a minor axis;
• a first spaced pair of stiles and a second pair of spaced stiles, each of said stiles arranged so that its sectional minor axis extends from the inside planar face to the outside;
• a top rail, a first bottom rail and a second bottom rail spaced above and vertically from said first bottom rail, each of said top and bottom rails having its sectional major axis extending from the inside planar face to the outside;
• an inside mullion spaced from an outside mullion arranged so that the inside mullion has its sectional minor axis extending from the inside face in the direction of the outside and the outside mullion has its sectional minor axis extending from the outside in the direction of the inside face, said inside and outside mullions extending from the top rail to said second bottom rail;
• at least one intermediate rail vertically spaced from said top rail and said second bottom rail across the width of said panel and from stile and disposed between said inside and outside mullions and said supporting skeleton of stiles to stile;
• said stiles and first and second bottom rails forming a generally horizontal manifold service conduit raceway;
• each pair of spaced stiles arranged to be a conduit service branch from said manifold;
• and each pair of spaced stiles forming a base for a connector element which may join said wall panel to a similar panel to form a modular wall having connecting manifold service conduit raceways.