Best way to install these new steel beams?

[raligt]

Went to survey this house as the steel beams supporting the first floor bathroom are showing significant corrosion damage.

As the floor slab is built into the steel web, I was thinking it would be too difficult to remove the existing and suggested cleaning and painting the existing steel, and installing new steel sections in below to support.

My issue is getting the new steel ends to bear upon the existing masonry. I have tried to design ledge angles resin anchored to wall but can't get fixing to work for the high end reaction circa 30kN at one end. Trying to avoid putting new steel posts in if possible as thought this may be overkill.

I would ideally like to pocket into wall on a padstone but the practicality of getting it installed is a puzzle for me. I have checked the existing walls and they are ok. Any ideas how we could install these directly below the existing steel into the wall?

I would be connecting the new steels to existing circular column via fin plates or steel angles which wont be a problem.

 

[JAE]

"I would be connecting the new steels to existing circular column via fin plates or steel angles which wont be a problem."

It might be a problem if you plan to weld onto that old column. The cap looks like a casting (cast iron?) which may not be weldable along with the column itself.
Should probably check out the material first.

If the old steel beams are deteriorated such that bending capacity is compromised, but shear capacity isn't, then you might be able to add reinforce the flexural capacity and leave the shear condition at the walls alone. You'd have to chip in to visually check the beam webs near the ends.

Otherwise, you can't really pocket a new beam by removing the bearing of the existing beam unless you devise a way to fully support the existing beams from their sides, or from above - which I can't see how you'd do it without tearing into the walls above...you might was well just remove then whole beam and replace.

 

[TRAK.Structural]

Along with JAE's concern, the existing steel column is loaded concentrically so if you end up connecting a new beam into the side you are introducing some eccentricity and moment. It may check out, but something to consider.

 

[raligt]

"I would be connecting the new steels to existing circular column via fin plates or steel angles which wont be a problem."

It might be a problem if you plan to weld onto that old column. The cap looks like a casting (cast iron?) which may not be weldable along with the column itself.
Should probably check out the material first.

If the old steel beams are deteriorated such that bending capacity is compromised, but shear capacity isn't, then you might be able to add reinforce the flexural capacity and leave the shear condition at the walls alone. You'd have to chip in to visually check the beam webs near the ends.

Otherwise, you can't really pocket a new beam by removing the bearing of the existing beam unless you devise a way to fully support the existing beams from their sides, or from above - which I can't see how you'd do it without tearing into the walls above...you might was well just remove then whole beam and replace.

Thanks JAE

I did not know this about cast iron but have done a bit of research and you are correct.

Ideally yes I would want to remove the beams and replace with new in existing location. I think the propping arrangement and method to do so is a tricky one. Strong boys don't have the capacity to support the masonry above and I can't needle through the wall because of the slab.