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You want to remove an exterior wall that is integral to the structure of the building so you will need to know how to provide a suitable, to code, way to support the load that the wall is carrying.
Suggestion: Hire a Structural Engineer to tell you what is required.
You will need a structural engineer to size the correct beam and post system that will be ...
2
While your approach is fine, but I prefer to add an edge beam as shown red in the sketch below. Then you only need to run the diagonal in between the beams.
1
Finally found the answer, they are equivalent and interchangeable as long as with the same grade (1.5 1.6 1.7 ect)
here some info (in french) about the two : https://cecobois.com/wp-content/uploads/2020/04/CECO-5600_Guide_Poutres_Colonnes_2015_WEB.pdf
See section 4.5
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