Minimum width of concrete on side of beam pocket to prevent overturning 1

[Jmeng1026]

I am trying to keep my beam pocket where it is so the contractor doesn't need to buy 14' long floor joists and cut off over a foot. The location it is in now allows the contractor to buy 12' and 14' long joists and not have to cut them at all.

However, this only leaves 1.5" of concrete on the side of my beam pocket which will support a triple 2x12 drop beam.

Is 1.5" enough to prevent the beam from overturning?

Thank you for the help.

 

[driftLimiter]

1.5" of concrete is basically worthless for any meaningful resistance. I would not rely on it for twisting restraint of a beam, or any other load from the structure.

 

[Jmeng1026]

I did not think so. I am wondering what the minimum width would be.

 

[driftLimiter]

You want to have at least 1 row of bars with full clear cover on all sides to use it for anything.

 

[dik]

How is the loading... I'd like at least 3" so 10M or 15M bar (#3-#5) can be accommodated.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[JStructsteel]

Why is the concrete resisting the overturning? What am I missing? A joist in a pocket should be stable via blocking, sheathing, etc.

 

[RPGs]

I am also confused. What overturning behavior is being resisted by the depth of the pocket for a simply supported beam? Isn't bearing stress the main question there?

 

[Tomfh]

Sketch please