Slab reinforcement - beginner questions

[Anonymous]

Hello,

I'm trying to get the reinforcement for a slab.

Below the MYY for the most unfavorable combination:

Below the graphic representation for the bottom slab reinforcement:

From this last picture, there is two things I don't understand:

• Why is there more reinforcement for the upper face?
• What are the two "blocks" generated in the  supports? Why are not they simetrical according to the slab?

Could you please  help me?

Thanks in advance

Best regards

[Rafal.Gaweda]

File please.

[Rafal.Gaweda · Accepted solution]

[Anonymous]

I've changed the local system orientation and it works well.

But, now I find next graphic:

Why is there a reinforcement zone missing?

Thanks in advance