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Restoration & Refurbishment

What size lintel for Internal French doors.

Anonymous user 3 March 2024 - 2.57 PM

Hi, i am wanting to put a set of internal french doors 46" wide into a load bearing wall, the wall is single brick in the centre of the house which is a 1950 semi detached property. The wall above is also single brick, then the attic space. My question is what size concrete lintel will i need? Thanks

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1 Answer

Anonymous user

I would go for a steel beam personally but you could also use a 100 x 65mm reinforced concrete lintel or a catnic. You should also fix padstones umder either end , the minimum bearing is 150mm each end so a 46" opening should require a minimum 1500mm lintel. As the wall is loadbearing you will need building regulation approval also & they may require a structural calculation , which you must obtain before work begins.

Answered12 December 2012