Abstract: A modular merchandising wall panel construction including at least two vertically oriented structural members in edge-to-edge engagement, and means affixing the structural members together and permitting ready disassembly thereof, comprising a vertically oriented standard affixed to the edge of one structural member, the standard being in the form of a channel having flanges extending therefrom, a wall of the channel having slots provided therein, and a plurality of rotary bolt locks mounted in the edge of the other structural member, the rotary bolt lock having an arcuate bolt engaging the slots of the vertical standard, thereby locking the structural members together, and permitting easy disassembly thereof. In one embodiment of the invention some of the structural members comprise pilasters also having rotary bolt locks or vertical standards for assembly with the other structural members.