Partition assembly

Claim 1

A RAIL-AND-POST STRUCTURE FOR A PARTITION ASSEMBLY OF THE TYPE WHEREIN A SHEET OF RIGID MATERIAL IS ENGAGED ALONG VERTICAL AND HORIZONTAL EDGES THEREOF, COMPRISING: A CHANNELED POST INCLUDING SPACED, PARALLEL FACE PORTIONS AND AN INTERMEDIATE WEB EXTENDING BETWEEN AND JOINING THE SAME, SAID FACE PORTIONS BEING RESILIENTLY, YIELDABLY SPREADABLE AND INCLUDING INWARDLY PROJECTING, LONGITUDINAL LOCKING RIBS HAVING INCLINED SURFACES DIVERGING IN A DIRECTION AWAY FROM THE WEB, EACH OF SAID RIBS HAVING A LOCKING FACE IN CONFRONTING, SPACED RELATION TO SAID WEB; AND A CHANNELED RAIL INCLUDING SIDE PORTIONS, AND A BASE PORTION EXTENDING BETWEEN AND JOINING THE SAME, SAID SIDE PORTIONS BEING RESILIENTLY, YIELDABLY SPREADABLE AND INCLUDING INWARDLY PROJECTING, LONGITUDINAL LOCKING RIBS HAVING INCLINED SURFACES DIVERGING IN A DIRECTION AWAY FROM THE BASE PORTION, SAID BASE PORTION INCLUDING AN EXTENSION PROJECTING INTO THE SPACE BETWEEN THE FACE PORTIONS OF THE POST AND FORMED WITH SIDE NOTCHES MATING WITH THE RIBS OF THE POST IN ENGAGEMENT WITH SAID LOCKING FACES THEREOF INTERLOCKING THE RAIL WITH THE POST, CORRESPONDING INCLINED SURFACES OF THE RAIL AND POST HAVING THE INNER LONGITUDINAL EDGES THEREOF IN A COMMON PLANE, SAID FACE AND SIDE PORTIONS HAVING OUTER SURFACES LYING IN A COMMON PLANE PARALLEL TO THE FIRST PLANE, FOR EQUAL SPREADING OF SAID FACE AND SIDE PORTIONS BY A SHEET ENGAGED THEREBY PROVIDING UNIFORM GRIPPING ENGAGEMENT OF THE SHEET BY THE POST AND RAIL ALONG THE VERTICAL AND HORIZONTAL EDGES, RESPECTIVELY, OF THE SHEET.