(57) A ceiling panel system comprising a plurality of intersecting grid members (12, 14) defining a plurality of open, cells (16), said grid members (12, 14) intersecting on a combined upper and lower level and including a first upper set of parallel elongate upper grid members (12) spanning two or more cells, a second set of parallel elongate lower grid members (14) extending at an angle to said first set and located therebelow and spanning two or more cells, in that a plurality of upper grid elements (20) are mounted above each grid member (14) of the second set, to form a continuation thereof and extending between or beyond adjacent upper grid members (12) of the first set and in that a plurality of lower grid elements (22) are mounted below each grid member (12) of the first set, to form a continuation thereof and extending between or beyond adjacent grid members (14) of the second set.