Knock-Through Of Supporting Wall - Lintel Question

[EViS]

We are very competent DIY'ers, in terms of having undertaken our own extensions and conversions in the past. However, this one is new to us so looking for some advice.

We would like to knock-through a supporting wall (couple of meters) and install a steel lintel. This will all be done under Building Control of course. However, we need some advice on the following:

1. Do we need structural calculations done? If so, how much should we be looking to pay for these?
2. Will the lintel need to be sited on pad stones, or can it be placed on the existing brickwork walls?
3. What methods are used to 'fix' the steel in place before boxing it in?

 

[jagillham]

I've had two out this week, but got builders to do it. Just as well, as the larger beam was a 6 man lift!

- BCO will want to see the calcs to sign it off. Our guy charged £150 for the first calculation, and £75 there after.
- Padstone will be needed, the SE will spec these for you.
- Out steel is supported by its weight, and gaps filled with brick/slate

Hope that helps

(P.S - I was thinking about DIY'ing it... but glad I didn't this job in end!)

 

[RonnyRaygun]

We are very competent DIY'ers, in terms of having undertaken our own extensions and conversions in the past. However, this one is new to us so looking for some advice.

We would like to knock-through a supporting wall (couple of meters) and install a steel lintel. This will all be done under Building Control of course. However, we need some advice on the following:

1. Do we need structural calculations done? If so, how much should we be looking to pay for these?
2. Will the lintel need to be sited on pad stones, or can it be placed on the existing brickwork walls?
3. What methods are used to 'fix' the steel in place before boxing it in?

1. Not necessarily. There are "deemed to satisfy" tables for shorter spans under certain loadings. Ask your BC if they will require calcs as they might not for a 2m opening.
2. They will probably want to see at least an engineering brick under the beam's bearings, but depends on the loads. Should be enough for a 2m span.
3. It should be held in place by the weight of the wall but make sure you dry-pack between the top of the beam and the wall to ensure even bearing to the beam.

 

[theoldun]

Ronny

There are "deemed to satisfy" tables for shorter spans under certain loadings.

Where can we find those tables please Ron.
Regards oldun

 

[RonnyRaygun]

Ronny

There are "deemed to satisfy" tables for shorter spans under certain loadings.

Where can we find those tables please Ron.
Regards oldun

On the internet Old Un...just got to know where to look
Of course they are produced by particular councils and probably not used by all.

 

[RonnyRaygun]

Ronny,
Where can we find those tables please Ron.
Regards oldun

Here is an example of what I was talking about Old Un.