Hollow pot slab construction - GIF

[ToolTalkBot]

Hollow pot slab construction.




Previously:

Concrete hollow block making machine - GIF
Decorative hollow concrete blocks - GIF
Hollow concrete block machine - GIF
Hollow core slab wheeled placement rig - GIF

[hemmjo]

I assume they are going to pour concrete over that system. Seems it would be more cost effective to form that with a boards which would allow closer rebar spacing, and reuse of the form boards. The cost of the clay filler would be eliminated. The system also puts the rebar closer to the top of the concrete slab rather the bottom where it would provide much more strength to a suspended slab.

What is the purpose of the clay filler block? What am I missing here?

[Saltfever]

It could be the cost of local materials or tradition. There is wood shoring in use but notice the walls are also clay. Something interesting is going on though. Notice the ribbed pattern is alternated up/down in pairs which means there are two manufacturing molds to position the hanging ribb correctly on the appropriate clay tile.

[albertq]

I assume they are going to pour concrete over that system. Seems it would be more cost effective to form that with a boards which would allow closer rebar spacing, and reuse of the form boards. The cost of the clay filler would be eliminated. The system also puts the rebar closer to the top of the concrete slab rather the bottom where it would provide much more strength to a suspended slab.

Would the rebar placed nearer the bottom of the concrete slab not give the slab more strength, being in tension instead of compression near the top.

[hemmjo]

Would the rebar placed nearer the bottom of the concrete slab not give the slab more strength, being in tension instead of compression near the top.

Yes. That is correct. Rebar should be either centered or closer to the surface in tension. But not TOO close. In have seen it places so close you can see the ridges or even the main part in the hardened concrete.

[Frank S]

The clay tiles don't add anything to the slab's structure Steel decking would be a lot better