Thanks @MitchellMc , I was going to use 4 of them just as I would if I were screwing the mount to the studs.

Thanks @Brad ,it is the new ekodeck plus which has 5mm spacing between boards. I’m contemplating using h4 timber for the joists and bearers as @Mitche ...

Thanks @MitchellMc , will using h4 timber help this issue?

I’m looking at building a deck over a concrete patio and extending it out over the grass. It’s only in the planning stage atm. The deck will be 7400x3 ...