The drawing shows a beam where the wall used to be. It can be easy to overlook the few hours, or days, when neither the old wall nor the completed new structure is carrying the load in its final arrangement.
That interval is part of the engineering problem.
Temporary does not mean approximate
Shoring is the temporary support used while structural work proceeds. It needs an appropriate load path too, including whatever sits beneath its bearing points. A row of posts upstairs does not explain what the basement floor can support.
Ontario's Construction Projects regulation addresses demolition and structural support. Treat the work as a planned construction sequence, with the responsible designer and contractor resolving the applicable requirements. This is not a homeowner prop-spacing guide.
Ask who owns the sequence
Before demolition, the scope should identify who provides the temporary-support design where required, who installs it, and who confirms the work can advance. The permanent beam drawing alone may not describe every temporary condition.
Useful questions are specific: What must be exposed first? What work below needs completing? At what stage is review required? What must be true before the shoring is removed?
Allow space for the work to happen
- Keep household circulation out of the work zone.
- Confirm how services inside the wall will be isolated or rerouted.
- Plan access for bringing in the permanent member.
- Coordinate required reviews before the work is concealed.
- Include protection and making good where temporary supports affect finishes.
A kitchen plan that preserves the island may still need the island area clear during installation. Temporary arrangements have a footprint, even when they disappear from the final photograph.
Do not confuse a visit with a release to proceed
PEO's general-review guidance explains the review of construction against design documents. Agree the relevant reviews and instructions for your project rather than assuming a quick site visit approves every stage.
Ask for the sequence and responsibilities in writing. You do not need to become the shoring designer. You do need a contractor who can explain what happens between "wall standing" and "beam complete" without skipping the middle.