Fire place lintel

[Jamespf1]

Hello,

Replacing an old gas fire and need to raise the opening.
It currently has a metal bar as the lintel.

If I am to install a new concrete lintel are the ones with a section of 100mm x 140mm up for the job?
It’s a ground floor gas fire and the house is 2 stories.

Current opening 900mm. New gas fire 865mm. Wall length 1.41m

Thanks

 

[23vc]

65mm will be fine. The size you’re talking about will be very heavy to handle in comparison