Quality control

Quality control is extended to the different project phases involving both materials and workmanship in order to ensure the specification requirements and reduce the risk to a minimum.
The Q.C. activities are grouped as follows:

Stone material control

-     physical and mechanical properties control through relevant material test certificates
-     physical and mechanical properties control by testing samples during production
-     aspect and finishing quality control (defect detection) by comparison to samples approved by the Architect
-     dimensional tolerance control of the stone processing related to the anchoring system
-     full scale tests of typical slabs with relevant fixing systems

anchoring system control

-     mechanical and physical properties control through acquisition of the certificates issued by the material supplier
-     dimensional control
-     thickness control of the surface protection (painting, hot deep galvanizing, etc.)
-     bolted connections control of structural members (tightening torque)
-     non destructive welding tests
-     welders and welding procedures qualification
-     galvanic separation control in connecting conductive materials of      different kind
-     full scale tests of stone support structures with evaluation of deflections under the design loads

On site control

-     dimensional control of the cladding position with respect to the building reference axis system
-     dimensional control of joints between slabs
-     bolted connections control (tightening torque)
-     pull-out strength tests on expansion bolts and adhesive bolts
-     watertight control of sealed joints and water barrier