Hi @abassi3,
A warm welcome to the Bunnings Workshop community, it is fantastic to have you join us at the planning stage of such an exciting project.
Unfortunately, using Hyne Timber's Bearer Span Table and Joist Span Table as references, you can see that 70x45 T3 Green MGP10, which is another way of referring to 70x45 H3 Pine, is not recommended for use in deck framing. The smallest profile that can be used is 90 x 45mm H3 Treated Pine Framing.
Working down from the top, Ekodeck is 23mm thick, then 90mm for framing will leave you with 17-27mm room for your pedestal feet. With your choice of materials, these Builders Edge 25-40mm Minifoot Pedestal Feet are the only pedestals that will fit within this space requirement assuming the finished decking height is above 138mm.
A profile gauge, such as this Empire 150mm Contour/Profile Gauge will come in handy for cutting in decking boards that run up against and butt into a round pillar. You can mark your decking boards with the contour gauge and then cut it with a jigsaw.
It can be tricky to frame around round pillars, so this will be something we need to consider in the framing plan for your deck.
If you were comfortable with drawing up and sharing a basic plan with the dimensions of the area, I'd be happy to look over it to ensure everything will work and will fit within the span tables. Some photos of the space would also be handy.
Let me know if you need a hand uploading images, I'm happy to help if required and please feel free to ask any further questions that you might have.
Jacob
