Foundations are essential to safety
Wind uplift and lateral forces, structural weight, snow loads and the ground type all influence the fixing method. A flat-looking terrace is not proof of suitable anchoring.
Review your site
Check soil, buried utilities, drainage, frost conditions, wall connections, available work space and safe access.
Use validated manufacturer drawings
The precise post positions and anchoring requirements should come from the verified manufacturer's technical documents and be checked against your site.
Items not automatically included
Excavation, concrete footings, specialised anchors and professional installation are site-specific and should not be assumed included unless the final product specification explicitly lists them.