How to build low clearance deck?

[L3mon1980]

Building a low clearance deck on a concrete slab 4.6mx7.1m. At the highest point at the backdoor is 80mm. So can I use 70x45 h3 for the joists using packers and concrete screws and if so what would be my spanning capacity for the concrete screws.

[L3mon1980]

Thankyou for your help i was using 7mm showing between each board as specified by the product being used. 

[EricL]

Hi @L3mon1980 

If the product you are using allows you to use a 7mm gap, then I would follow their recommendation.

If you need further assistance, please let us know.

Eric