Where the maximum +ve moment in slab? From where we have to start the removal of shattering work of RCC slab Casting.?

Positive bending moment occurs at the middle of the slab  and negative occurs at the corner of the slab. The shuttering removal can be from any part of the slab as when it has completed about21 days after casting.

You've got answers by brothers above still I'd like to put some light on it Since in slabs max +ve moment occurs at midspan if its simply supported, and in case of fixed support max +ve moment occurs at midspan and -ve moment at corners but if the supports are fixed -ve moment is higher than the +ve moment. And about the process of removal of shuttering the best is to start from the point where moment is minimum proceeding further towards maximum. Example if its a cantilever beam you should start removing props from the free end proceeding towards the supported end bcuz at free end moment is minimum and as you go further towards the supported end you'll come to know the flaws if any and it can be overcome by adopting suitable measures, in the same way in a beam supported at both ends during removal of shuttering you should start from one supported end to midspan and again from another supported end to midspan. And in slabs, you must start from the corners and ending at the center. Please let me know if u wanna know anymore Also recommend me if there's a job opportunity that suits on me. I'm a B.Sc(Mathematics)+B.Tech civil engineer and have5 months of experience in building construction

Max +ve moment @ the center of the span ,

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We can remove it depending on the moment increase slowly and not suddenly. It happens in simply supported slabs or continues slabs when we remove it from the middle first. But in cantilever case it happens when we remove it from the edge frist