(57) A false ceiling structure incudes parallel carrying sections curved in a vertical
direction, which carry false ceiling slabs (3), the latter being self-supporting between
adjacent sections (1). The slab (3) has a readily flexible outer layer (32) which
is exposed. The slab further includes a mineral fibre layer (33) which is bonded to
the outer layer (32). The layer (33) is formed of a plurality of parallel, tightly
adjacent billets (331) of mineral fibre. The billets extend unbroken between the two
slab edges (31) carried by the section flanges (2). The billets have a fibre orientation,
which is in planes substantially at right angles to the plane of the outer layer (32)
and to the longitudinal direction of said two slab edges (31), such that the slab
(3) has a substantially lower bending stiffness in the longitudinal direction of the
sections (1) then at right angles to said direction.
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