Replacing wooden lintels

[-Sal-]

Good morning everyone,

I've uncovered a rotten wooden lintel above my windows, and would like some advice on which lintel I need to replace it with.

It spans the full width of the room, no breaks, over the top of two windows.

It's a solid 9inch brick wall, so this is internal. My plan is to strong boy above, pull this out and replace with concrete. I think two, as I have the required 150 end bearing in the middle between the windows.

Can anyone advise on what lintels I need?

Thanks

 

[wessex101]

It is more complicated than that. It looks like it is also a bonding timber/wallplate taking the ceiling joists. Are you going to reinstate the ceiling joists? Is that a small gable wall above? How are you going to tie that in and prevent the wall from bulging out? What is supporting the outside of the window opening? Is it a brick arch or possibly a stone lintel?
Lots more questions to answer before you go popping a standard precast concrete lintel in the hole.

 

[-Sal-]

It is more complicated than that. It looks like it is also a bonding timber/wallplate taking the ceiling joists. Are you going to reinstate the ceiling joists? Is that a small gable wall above? How are you going to tie that in and prevent the wall from bulging out? What is supporting the outside of the window opening? Is it a brick arch or possibly a stone lintel?
Lots more questions to answer before you go popping a standard precast concrete lintel in the hole.

The ceiling joists are not going back in. They were removed to carry out work on the roof as per structural engineer. there are new rafters and steels going up. outside is a stone lintel.

 

[-Sal-]

It is more complicated than that. It looks like it is also a bonding timber/wallplate taking the ceiling joists. Are you going to reinstate the ceiling joists? Is that a small gable wall above? How are you going to tie that in and prevent the wall from bulging out? What is supporting the outside of the window opening? Is it a brick arch or possibly a stone lintel?
Lots more questions to answer before you go popping a standard precast concrete lintel in the hole.

This steel is being replaced. Original wooden valley beam is staying

 

[wessex101]

Ordinarily you could just slip in a 65x100mm concrete lintel. But in this case I would check with the structural engineer to make sure they realise the ceiling joists have been removed and there is adequate lateral restraint to the gable wall.

 

[-Sal-]

Ordinarily you could just slip in a 65x100mm concrete lintel. But in this case I would check with the structural engineer to make sure they realise the ceiling joists have been removed and there is adequate lateral restraint to the gable wall.

Thanks. The structural engineer has seen it, they know the ceiling joists have been removed, and their plan is being followed with regards to the roof and ceiling. I want to avoid shelling out for SE calculations as to which concrete lintel I need to put in, and was hoping someone here could tell from experience what would do the job.

 

[wessex101]

A 65x100mm concrete lintel should be fine then.

 

[Dereekoo]

A 65x100mm concrete lintel should be fine then.

Agree. Assume the lintel is supporting a 1000 wide opening by 1000 high block of brickwork above (assumes no relief due to any loads being transferred sideways to adjacent brickwork as existing brickwork joints don't look all that solid) giving a udl of 2.46kn/m plus a 300mm width of loading from the roof above adding a extra load of 1.5kn/m2 x 0.3 = 0.45kn/m giving total load of 2.91kn/m. Allowable udl for 1350 standard length lintel is about 5kn/m so well within requirements.

 

[-Sal-]

A 65x100mm concrete lintel should be fine then.

Thanks very much

 

[-Sal-]

Agree. Assume the lintel is supporting a 1000 wide opening by 1000 high block of brickwork above (assumes no relief due to any loads being transferred sideways to adjacent brickwork as existing brickwork joints don't look all that solid) giving a udl of 2.46kn/m plus a 300mm width of loading from the roof above adding a extra load of 1.5kn/m2 x 0.3 = 0.45kn/m giving total load of 2.91kn/m. Allowable udl for 1350 standard length lintel is about 5kn/m so well within requirements.

Nice one, thanks very much for that