How to build deck over concrete and soil?

[JesseS6]

Hi All,

I think I have finally finished my design for my deck which will be half over concrete and half over soil.

Over the concrete I have 180mm to the top of the brick. I will be using 140x19mm merbau. For the joists I plan to use 140 x 45 Pine set 21mm off the concrete using Zinc Plated Reinforcing Angle Bracket with the joist. I will Dynabolt these using a DynaBolt Plus Hex Nut to the concrete every meter or so.

The joists have 355mm centres, I will just use a nail gun to fix these every 1m along the joists.

Over the soil, I will dig out about 300mm and put down crushed rock and ag pipe for drainage. The posts will concrete in 300mm and out 320mm. With bearers cut in. I will be using 190 x 45mm Bearers with 1218mm spacings. The posts will have 1000mm spacings.

The deck will also be a picture frame deck.

I have drawings below, please provide any comment, or issues, corrects, errors you may notice.

[JesseS6]

Perfect Thank you

[JesseS6]

Sorry @JacobZ ,

so would you compact the road base? 

[JacobZ]

Hi @JesseS6,

Yes, I would compact the road base, but I would compact it level. There's no need for a fall in the road base.

Jacob