The objective of
this project is to design a roof for a spatial structure of about 5x5m. The
three-dimensional structure is characterised by its lightness and speed of
assembly, being composed of hollow tubes bolted at nodes. Essential
characteristics for an itinerating fair stand.
With these
starting parameters, a square canvas is designed, fixed to the structure with
perimeter bags. Tension is then applied by lower hoists located at the nodes of
the structure itself. With this mechanism, the necessary criteria for a stand
and for speed of assembly and disassembly are achieved.
A completely
flat canvas has been designed, without giving shape to the templates. The width
of the 4 templates of the canvas coincide with the distance between the fulcra
of the structure, in such a way that the welds meet the lifting pins.
In this case,
the templates are sent for cutting without scaling, since the tension in the
canvas is applied by lifting the pins once the canvas is fixed to the
perimeter. The vertical height of the pins is only 70 mm, so there is not much
margin for error. If the structure had not been precise we might have come
short with the tension.
The canvas is
materialised with the VIP FR canvas, which has properties similar to those of
the PVC Ferrari 502 canvas, in white. The polyamide joining pieces between the
metal hoists and the canvas itself are replaced by black plastic ferrules which
fit perfectly into the geometry of the node.
For future
collaborations, it has been decided to leave more slack in the canvas to be
able to fasten it to the edges more easily and so that the lower hoists have a
longer run.
