Extending existing steel beam.

[Lightfan]

Hi,
I have to remove a brick pillar extend an existing steel beam by 150mm to the inner leaf of a cavity wall. (Current beam 178x60mm PFC) I've been advised by an engineer to to stitch a new 700mm long 125x65x15mm PFC to the inside of the existing using x4 M12 8.8 high tensile steel bolts or if I want for peace of mind use x 4 M12 10.9 high tensile steel bolts and use a 450x150x100mm padstone. Would this be ok? The other side is resting on a brick pillar.

 

[Bonni]

Structural work requires building regs and they would want a copy of the structural engineers notes on the beam for their file.

 

[tony1851]

Grade 8.8 is the usual standard and would be fine.
More importantly, has the SE given you the bolt spacing?

 

[Lightfan]

Yeah, minimum 50mm from edge of existing. Then 140mm triangulated/ pyramid spacing. Using M12 60mm 10.9 high tensile. I always over engineer...
Cheers

 

[Lightfan]

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