(57) Forming device (10) for concrete casts for making a building artifact (11), comprising
a plurality of lateral elements (12, 13, 15, 16), associated with each other so as
to define the outer profile of the building artifact (11), and clamping members (17)
to selectively clamp together the lateral elements (12, 13, 15, 16) so as to form
a compact and substantially rigid structure. The clamping members (17) comprise a
flexible element (19) of the non-extendable type, arranged externally around the lateral
elements (12, 13, 15, 16) and a plurality of tensioning members (20, 21) associated
with the lateral elements (12, 13, 15, 16) in order to act against the flexible element
(19) and determine the tensioning thereof.
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