the reduced size of the lower end of the inverted column 18 also provides for greater useful floor space it should be brought out that the grooves 40 42 44 and 46 all or any of them may be employed as passage means for enabling for example the drawing therethrough of telephone or electrical cable as from above a drop type ceiling 374 to any selected location in proximity to such related inverted column 18 further after such cables are drawn through the grooves suitable facing like cover means not shown may be placed in the grooves as to cover such cables although the preferred form of the invention employs trapezoidal wall panels it should be clear that wall panels of other configurations may be employed without departing from the spirit of the invention however it has been discovered that panels having inclined side edges such as at 16 provide the best means for dissipating loading stresses imposed on such panels from atop thereof to the spaced cooperating columns or posts fig3 is a somewhat simplified illustration of two columns 400 402 and cooperating wall panel member 412 this is a typical type of illustration and such reference numbers as are employed are used merely for ease of specific reference assuming that the columns 400 and 402 are operatively connected to each other as by a base member 415 and a wall panel member 412 is situated therein let it further be assumed that there is a generally equal.