Notch bearer for plumbing Advice please

Hi All,

I had my plumber visit on Saturday morning to investigate and quote for running the waste and water supply for my bedroom to bathroom conversion. I have the floor up in the hallway where the T junction is that he can use for the waste.
Now water is no problem as the pipes run under the room I will be converting but in order to get the waste fall correct he said he will have to notch or possibly cut the bearer.

He said this would be ok if I place a stump on either side of the point being cut. He suggested dig 500/600mm (about standard depth for stumps in my area) deep and then create a concrete pad to bolt some adjustable steel stumps to. I believe he meant something like this
https://www.levelmaster.com.au/shop/

Is this structurally safe to do. Is there any way I can strengthen the bearer with say steel across the cut out part as well as the stumps. Or is there a better option?

Advice please.

Thanks Zeroasylum


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