Rsj would have a span of 3750mm from internal load bearing wall 220mm thick approx to rear external wall also 220 approx.
Removing chimney breast ground floor only.
Building regulations apply to this work because it is a material alteration to the structure ensuring the remaining.
Want to remove the chimney breast on the party wall from the ground floor only.
Homeowners rarely go to the cost of scaffold to remove the chimney above the roof or may not be able to if it is shared with a neighbour.
Note that removing any portion of a chimney breast will require structural reinforcements for that floor and the one above as well as possible reinforcement of the outer wall.
Our chartered surveyors often see houses where only part of a chimney has been removed often just the ground floor or ground and first floor remaining only in the loft.
We would need to explore the flooring above the chimney to expose the joist giving access to calculate the dimensions of re enforced steel joist to sit within the ceiling floor void therefore removing the bulk head or inner beam visible within the ground floor space.
Chimney breast exists on 1st floor but chimney top has been removed previously.
Yes this is regularly done for clients is relatively straight forward.
In the event you wish to reclaim this space in a room it is possible to remove only that section of the breast instead of the entire chimney.
No only does this mean it is actually not as disruptive as you might have thought but it also avoids the need to alter the roof or external appearance and character of the building.