Structural Engineer

We are a landscaping company building an outbuilding with green roof at the moment. We are looking for some advice on green roof weight bearing based on post locations and quantity of posts.

Generally, its going to be a green roof structure and the footprint is 570x405cm. Green roof weight will be at least 3000kg(plus marine ply) and we are planning to use 150x150mm oak posts. I can also share the base plan and further details.

We don't have an accurate budget for this work at the moment. So we will be waiting for your offers and timescale informations please.

Thanks
Ilayda