How to support Rafter on RSJ

[Ricardo Da Silva]

We are planning an extension that will abut to our pitched roof. This will involve cutting back rafters and replacing the roof plate with an I-Beam. I would like to understand how this should be installed to continue to support existing rafters please. The below shows 2 options of how I envisage this should work

Thank you

 

[blup]

Are you removing the wall as well as the wall plate?

Blup

 

[Ricardo Da Silva]

Yes, correct. The wall will be replaced with beam and column both ends.

 

[blup]

Like for like option 2 has got to be greater load bearing, but you might to lower the ceiling

Blup

 

[blup]

Sorry prop 1

 

[Ricardo Da Silva]

Thank you kindly, But is Prop2 still a possibility provided the beam is sized correctly or are there other factors what would prevent this configuration

 

[blup]

Not an SE, you need to take expert advice, but supporting a joist on one half of the web will have implications for loading/torsional forces, but ultimately depends on design.

Blup

 

[Dereekoo]

I prefer prop 3 which is like prop 1 but the ceiling rafter is put on top of the beam along side the existing rafters