Padstone or engineering bricks under steel

[sparer]

Hi,
I need to fit a steel beam across an 7ft span in my bungalow as I want to move the wall back 300mm to gain a little space in the bathroom. I've been told that a 7x4" steel should do it. It will be supporting the wall plate and the roof as well as some of a flat roof structure. I understand that I should have 150mm bearing either side of the steel but what will building control want to see in terms of a padstone or engineering bricks? Will they also expect to see a calculation? See the attached image. The steel is represented by the red line.

Thanks

 

[Doggit]

It'll be down to the BCO as to whether he accepts the steel, or asks for calculations to prove it. Or he may go for a larger size to play safe, and that could well work out cheaper than getting the calcs done. As it's, taking the weight of the roof, they may ask for engineering bricks, but these are questions that you should be asking the BCO.

 

[sparer]

Thanks Doggit. Didn't want to ask the BCO elementary questions but it seems that perhaps they aren't that elementary after all.

 

[Doggit]

Unfortunately, they come in all shapes and sizes, and attitudes. It may well be an elementary question, but he's got to be happy before he'll sign off the job, so much better to ask him what he wants you to do.

 

[John D v2.0]

It's not clear the age of your building but If the original bricks are 1920s specials, the pad stone or a few courses of engineering bricks is necessary to spread the load out across the wall. If your building is new bricks, there's every chance even those soft celcon blocks would be strong enough.
As above is probably down to your bco and your own judgement what you're happy to accept.

 

[sparer]

I spoke to the BCO. 7x4 steel is fine with a couple of blues underneath.