Strengthen old wooden beam/joist

Hi.. To be perfectly honest.. It's seems like the old timber needs to be acro propped up removed and a new one fitted.. Cost needs to be assessed... Hope this helps..

When dealing with a very old timber beam that supports a bedroom above, there are several potential steps that might be taken: Inspection and Assessment: A structural engineer will need to inspect the beam and the surrounding area to assess the extent of the slippage, identify the underlying cause, and determine the overall condition of the beam. Repair or Reinforcement: Based on the engineer's assessment, they may recommend different repair or reinforcement options. This could involve additional bolting or steel plate installation, installing additional support beams, or other measures to stabilize the existing beam and prevent further slippage. Replacement: In some cases, if the timber beam is severely compromised or damaged, replacement might be the most appropriate solution. The engineer will evaluate whether replacement is necessary and what type of beam (e.g., timber, steel, or composite) would be suitable for your specific requirements. Cost Estimate: The cost of the work will depend on the extent of the repair or reinforcement needed, the materials involved, and the labor required. After the inspection, the structural engineer or contractor will provide you with a detailed cost estimate. Compliance and Permits: Depending on your location and the scope of the work, there might be building regulations and permits required. A qualified professional will be familiar with these regulations and ensure that any necessary permits are obtained.

It’s very difficult to answer this question without looking at the job , there could be nothing wrong with the beam it could be dropping on the wall plate as the mortar has decayed , very Common on floor joists in old houses