Hi there,
I'm going to have an extension on the rear of my bungalow.
I want to demolish most of the existing rear external wall and have steel beam inserted which will span the full width of the extension (about 6 metres).
This beam will rest on the remaining edges of the external wall.
However this external wall is a cavity wall with 100mm brick, 100mm cavity then 100mm block.
I want the inner walls to run flush into the new extension without any nibs or lips.
The steel beam will only be holding up the existing roof, I imagine positioned directly under the existing wall plate.
My question is, will this be possible?
Is it ok for the steel beam to just sit on the inner skin of blockwork (100mm), with a padstone beneath to spread the weight?
I beleive it could not rest on both the inner and outer skins due to cold bridging issues, is this right?
What kind of depth would the beam be approximately?
I am aware that I will need to get a structural engineer to do calculations, but i just want to know if its all fine in principle before approaching them.
All help much appreciated
I'm going to have an extension on the rear of my bungalow.
I want to demolish most of the existing rear external wall and have steel beam inserted which will span the full width of the extension (about 6 metres).
This beam will rest on the remaining edges of the external wall.
However this external wall is a cavity wall with 100mm brick, 100mm cavity then 100mm block.
I want the inner walls to run flush into the new extension without any nibs or lips.
The steel beam will only be holding up the existing roof, I imagine positioned directly under the existing wall plate.
My question is, will this be possible?
Is it ok for the steel beam to just sit on the inner skin of blockwork (100mm), with a padstone beneath to spread the weight?
I beleive it could not rest on both the inner and outer skins due to cold bridging issues, is this right?
What kind of depth would the beam be approximately?
I am aware that I will need to get a structural engineer to do calculations, but i just want to know if its all fine in principle before approaching them.
All help much appreciated