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No plans on blocking the glass so we can't see out of it. If you saw the other picture I posted, it will similar use of space - dining + relaxing corner. This new extension is open on the other side (with a large brick pier in between) leading to the living room. I'm not sure 100% how the...

Ok guys, I have agreed a soulution with 2 SE' We are going to put in 305 x 305 x137UC and raise the beam height by 20mm. Even if we had max deflection of 20mm it won't imapact sliding doors. On top of the door fame there is also a seperate 20mm trickle vent piece which can be taken out...

I now know what you are talking about (precambering the beam) and raising the beam ends. Hopefully this is now an easy fix. Piers are only .75m wide on one side & 1m on the other - one SE thinks they are not large enough to hold 240kg beam, but another thinks they are ok if reinforced with...

Indus Glad someone on here doesn't think it's a pile of crap. Def put a picture up when done - might even get noseall's approval :)

Woody, 2.5m high glass... How high a ceiling is not too low on a single storey extension - This was the max planning would approve.. Somehow , an error has been made in steel size and deflection calculation which came to light when the glass was going to be fitted. The intension was never to...

noseall, I understand you would have prefered my 10m 'yawning' aperture to be half filled with brick. What would I have done with that brick wall - hung a few pictures on it? I want my garden to be the picture.... and I wanted to add a wow factor to the house. In essence it is more of a...

The opening will house 2 fixed panels of glass at each end of 2.5m each which do not open.The middle section of 5m are sliding doors, they are bottom hung. The glass doors and tracks are been manufactured and are on site - cannot change pillar widths/extra pillars etc now as glass was *****...

Tony, I will ask these SE about the points that you have talked about. I have been clear with them in saying that I want total deflection to be 7mm or less with the roof completed ie parapet,roof lights,asphalt etc. I have even seen one guys workings - he has live loads & dead loads...

Noseall, It's more of a glass wall than a big door, with 2 fixed panel of glass at each end and 2 in the middle that slide open. Sorry you don't like it... Tony, Are you saying that you think the total deflection on the steel will be more than 12-15mm + live load deflection say 3mm with...

Why is it bonkers? Glass across will give an amazing view of 150ft garden. I've seen many similar or even bigger on many archictectural websites..

Tony, The opening is 10m The piers are .75m each - cavity wall brick & breeze block construction. These are now going to be strengthed with concrete down the cavity. The roof span is 6m 9x3 roof joists 0.75kn/msq loading 5 courses of two sided bricks on top of the beam + coping stone...

Unfortunately I have to trust someone and go with it. Having 3 SE and 3 different opinions makes it even more difficult to do. It's been cocked up once at great expense and I have to get it right this time round. The glass and tracks have all been manufacutured and delivered so I can't mess...

Tony, Having looked at the Steel tables after your post there is a 305x305x137UC with I value of 32814 cm^4 From what you are saying the above would deflect even less than the 254 x 254 x 167 I = 29900 cm^4 and would also be lighter. Maybe after considering all 3 recs given by the...

The extension is 6m deep and 12m wide and we are using top range glass etc to manage heat issues. 3 structural engineers, 3 answers.. what did I expect :x What would you guys do in my position - which one for least deflection?

I have an large 10m opening for sliding doors on a single strorey extension. The original beam spec for the project was a single steel 203x203x60 UC grade 275 The structural engineer has obviously made a big mistake as when a five course two sided brick parapet was built on top of the beam...

long story - but I had to get two independent structural enginners to give me calculations for insurance purposes to replace a beam that was advised by another SE but turned out to be inadequate and had to be taken out.

Can someone confirm Which of these beams is stonger and can take a heavier load 305X305X118UC or 254X254X167UC My understanding is that the latter is heavier, 167kg/m and thus can take a heavier load I have two seperate structural engineers who have spec each of the above beams for an...

any brick experts out there to stab a guess?