Temporary pier for RSJs - padstones required?

Hi all,

I am building a side-return extension on my victorian terrace, removing 2 internal walls and 1 external wall.

My plan is to remove the internal walls first, leaving small portions of the wall in place as temporary piers (the parts which join the external wall which will be removed when the long steel is fitted). This will mean I can maintain a working kitchen for longer before the external wall is removed (which currently has the boiler and sink etc. attached to).

Question is, can I leave the steels sat on a portion of the wall for a few weeks before I have those steels bolted/welded to the big steel when that is fitted, without putting a padstone in place on those temporary piers?

If this sounds stupid, which it may well do, can anyone suggest an alternative?

Thanks.

(SE drawing attached FYI)

You could do, with suitable propping etc, but I can't see what you gain for what would be a fair bit of work - I put all my steels in (months) before removing the walls underneath. Unless those two little ones are going in the ceiling they can go in after the big one.

This is my kitchen/dining room wall with steel beam inserted above:

The plan to take the 2 internal walls out first was so that I could progress the floor, including laying a soil pipe under the stairs which will need to run the length of the kitchen. The first third of the room (where the working kitchen is) is a floating floor on joists, with the last two thirds of the room concreted. I was thinking I could break all that concrete and get it dug down without disturbing the working kitchen, then when the extension wall and roof is built and we break through, the floor would be nearly ready to lay the type 1 and then I could get the slab laid pretty quickly. As I'm doing as much of it myself as possible, breaking it down into parts will let me get rid of the (endless) amounts of waste I'm generating by breaking concrete, digging down etc. Does that make any sense?

I see. I'd stick an acrow under the end of the steel as well just for belt and braces.