Hi all,
I'm in the process of building an extension.
This post is in regard to an 20 year old house, masonry inner and outer leaf, not timber frame, knock-through is ground floor from existing external/outside wall into new extension.
The structural engineer designed goal posts/box section for a 2.7 meter knock-through opening, however, builder suggests it's over-engineered and will cost 3x that of just using an RSJ on pad stones. Builder thinks original structural engineer thought the house was timber frame.
Struc engineer is now MIA, having used a new structural engineer, they're suggesting a single beam on padstones with a 100mm plate welded on top to support the inner and outer leaf. I've gone back to them to ensure this is safe enough, as the inner leaf would support the first-floor floor loads and masonry and assuming roof whilst outer leaf the outer skin brick work.
Any thoughts would single steel be enough resting onto padstones to support that weight?
E.g quick sketch:
Using beam 152 x 152 x 37UC, S275 10mm thick welded plate to support wall At each side 300 x 100 x 140 Concrete padstone
Thanks
I'm in the process of building an extension.
This post is in regard to an 20 year old house, masonry inner and outer leaf, not timber frame, knock-through is ground floor from existing external/outside wall into new extension.
The structural engineer designed goal posts/box section for a 2.7 meter knock-through opening, however, builder suggests it's over-engineered and will cost 3x that of just using an RSJ on pad stones. Builder thinks original structural engineer thought the house was timber frame.
Struc engineer is now MIA, having used a new structural engineer, they're suggesting a single beam on padstones with a 100mm plate welded on top to support the inner and outer leaf. I've gone back to them to ensure this is safe enough, as the inner leaf would support the first-floor floor loads and masonry and assuming roof whilst outer leaf the outer skin brick work.
Any thoughts would single steel be enough resting onto padstones to support that weight?
E.g quick sketch:
Using beam 152 x 152 x 37UC, S275 10mm thick welded plate to support wall At each side 300 x 100 x 140 Concrete padstone
Thanks