Recently, I turned my boring ugly backyard into an amazing sitting area using the brand new Ekodeck decking. Here are a few photos of the different stages and the final finished deck.
Hi @sankhadlt treated pine Framing 70 x 35mm for that concrete area sounds good and yes I fixed them to my alfresco tiles with screws/plugs (example here). I had to pre-drill holes in the tiles for the screws and plugs. In your case the concrete area seems sloping outwards so you would need to make sure the frame sits leveled on the concrete. Hope that helps.