(57) A modular floor panel system comprises panel components (12, 14, 16) each having
a joint part (34, 42) extending along at least one panel edge (32, 40), the joint
part being shaped to interlock with a complimentary joint part (38, 52) extending
along the meeting edge (36, 50) of an adjacent panel component, and the complimentary
joint parts further being shaped to interconnect by relative panel component movement
generally out of the plane of panel components; whereby, in use, the interlocked and
interconnected joint parts resist relative, planar separation of joined panel components:
in a preferred embodiment, a modular stair tread and riser system has stair nosings
(12), tread plates (14) and chamfer plates (16) interconnected and interlocked by
angled hook joints (34,38, 42,52).
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