Abstract: A modular packaging system of corrugated fibreboard construction is provided for relatively large-scale, fragile planiform materials, such as glass doors and architectural glass panels. Panels in a predetermined range of dimensions are individually enclosed within an adaptable, protective case. One or more loaded panel cases, in a substantially vertical orientation, are stacked horizontally and strapped together with a pair of buttressing pillars at each end, on opposite faces thereof. Two shock-absorbing base blocks are provided, upon which said panel case or bound stack rests. Each base block is a laminate, constructed of bonded corrugated fibreboard panels, and is disposed underneath the panel case or stack of cases, proximal to a respective lateral edge thereof, with its ends secured within recesses at the base of the pillars bound at that end.