Flat plate depression for planting 1

[hoshang]

Hi all,
Have you ever encountered a flat plate with depression for planting? Please find the attached file[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1725910112/tips/Planting_area_h5xy1f.pdf[/url]
The depression would be 600mm.

 

[hoshang]

Hi all,
How would this be supported by the structural system? My thought is to consider the column strips as the supporting system for the flat plate depression (GF-11). Am I right?
any help would be highly appreciated.

 

[BridgeSmith]

Not sure what you're describing or showing in the sketch. What is the shape and size of the depression? You use the term "plate", which would indicate something made out of steel (?). If so, my question would be, why would you use steel for this? Concrete can be shaped easily; steel, not so much.

 

[hoshang]

You use the term "plate", which would indicate something made out of steel (?). If so, my question would be, why would you use steel for this? Concrete can be shaped easily; steel, not so much.

RC flat plate (a slab without beams, drop panels, and column capitals).

 

[BridgeSmith]

Ok, so you have a concrete slab with a contoured top. I still don't see anything that provides dimensions for your slab or anything that indicates where and what kind of columns and beams are available to support it.

 

[TLHS]

I mean, you've kind of got two options if that's just supported by the surrounding slab.

1. You design the supporting slab like there's a hole in it with a load applied to the edge and then design the depressed slab with pins on the edges and it hanging from the main slab.
2. You design the depressed slab as integral to the span and bring the spanning moments down and into it

Then you detail to suit your assumptions

 

[Tomfh]

Finite element software is good for this sort of thing. Otherwise check it with strips. note that the normal column strip middle strip concept doesnt really apply in highly irregular scenarios like this.

 

[hoshang]

1. You design the supporting slab like there's a hole in it with a load applied to the edge and then design the depressed slab with pins on the edges and it hanging from the main slab.

Why pins on the edges?

2. You design the depressed slab as integral to the span and bring the spanning moments down and into it

Can you elaborate more on this?

 

[cliff234]

Treat the depression like a slab opening and put 25% of the load on each of the four sides of the "opening".

 

[hoshang]

1. You design the supporting slab like there's a hole in it with a load applied to the edge and then design the depressed slab with pins on the edges and it hanging from the main slab.

Why pins on the edges?
Do you mean releasing moments on the edges?

 

[hoshang]

Hi all,
any help would be highly appreciated.