What Lintel? UPDATE: Now how to install Lintel.....?

[PPK]

I am in the process of converting my garage, had building control round and mentioned the size door that I want to put in the rear (1900mm) simply said use the same lintel you have just longer (currently a approx 900 door their currently.

Garage is attached to the house with its own pitched roof.

I was thinking of using the following CCS Single Leaf Wall Lintel 2250mm (SWL 20 kN):
http://www.condell-ltd.com/ProductDetails.aspx?ProductID=17626

Read on here that it's not advisable to drill into these, which I guess I will need to do in order to properly install the door frame (by fold doors). Any advise would be appreciated.

Existing is a Catnic see in this pic

 

[pred]

Who are you getting the door from? Ask them if you can attach the top of the door with foam.

 

[PPK]

I do not think that is an option, they are top hung. Just called them and they said it's fine to drill into the lintel. I still would like people's thoughts on this.

 

[RonnyRaygun]

I do not think that is an option, they are top hung. Just called them and they said it's fine to drill into the lintel. I still would like people's thoughts on this.

Looks like there might be a small risk of water ingress if you drill through.
Rubber washers would prevent that.
It isn't going to cause any problems structurally drilling into it.

 

[PPK]

Cheers Ronny, note that you are a Structural Engineer, I'm sure they can advise when I go to get the lintel but I assume that lintel I suggested is up to the task in your opinion? Is there any rule of thumb in weight terms (kN) for a pitched garage roof?

 

[PPK]

Thought I would post back my findings after speaking with Catnic directly.

They calculated the weight of the roof at that point as just over 10 kN. So that Lintel is fine, also confirmed that it's OK to drill into the lintel to support the doors, as long as the hole is painted after to stop any rust.

 

[PPK]

Arrhh, so you think you have things sorted then realise that there is only two courses of brick above the door (and proposed new door). Am I right in thinking that the wood of the trusses is OK to sit on the lintel?

But I can't fathom how I am going to get the lintel in there as the stongboys will be in the way, see a pic for what I'm on about - any guidance appreciated! Could I just support the beams inside the garage on acro's?

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