Abstract: The assembly of the present invention includes a support member having a panel support portion for supporting the ceiling panel along its length. The support member also includes a wall fixation portion for affixing the support member to a wall. The assembly also includes a retaining member for retaining one ceiling panel in the assembly, the retaining member having an attachment member engageable with the support member and a clamping portion extending from the attachment member for restraining the ceiling panel in the assembly when the pivot member is fully engaged with the support member. A closure member is disposable between adjacent ceiling panels and is engageable with the support member and the retaining member so as to close the assembly and lock the clamping portion of the retaining member against the ceiling panel.