Any structural building engineers out there..for free advice!!????

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dikko
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Any structural building engineers out there..for free advice!!????

Mrs D wants me to knock down old conservatory for something a bit smarter. I think I'm meant to call it 'an orangery' these days...  Flat roof with roof light (300Kg), total 4.2M wide coming out 3.9M. She's picked the doors (bottom weight-bearing) from some wonderful glossy brochures and just wants me to throw up a roof...

Thought I'd go for flitch beams off two walls meeting one upright clad corner steel as I can handle that. Can anyone give me sizes of flitch, roof joists and steel upright/pads that would be safe for the oranges and B.Inspectre to be happy with?

By the way, hello to all, been too busy to visit the Forum for far too long... and now I need something..! Typical..

Donation to Club Charity for service??   Dikko.

Geoff Brown
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I though that 'Orangeries' had pitched glazed roofs?

If so PVCU systems meet & exceed all the BS & EN standard for structural compliance ie withstands winds up to 130mph.

You can get a bespoke roof kit produced for DIY construction from any good PVCU system manufacturer,

But as it is to be a flat roof, therefore not an 'Orangery' I guess it should meet a certain minimum standard for construction. As the new build is less than 30sq m there probably is no need for planning or inspection if it is not 'quote' an extension.

But I am sure someone qualified will come along to otherwise advise.....

Derek Batty
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I would think if you asked for an orangery it would cost more than a conservatory , cos it sounds posher 

derek

Garth
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Could have done this for you 25 years ago when I was working as a Structural Engineer, but cannot remember how to design a simple beam nowadays!

This sounds like a bit more than the back of a fag packet job to me and I would certainly not feel confident giving any advice based on your description above - even if I was still competent!

Foundations?

Pretty sure you will need to involve Building Control who will want to inspect the works and will also want structural calculations?

Good luck.

dikko
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'Orangery' is the new name in the 'ome counties for a knock-up extention with a bit of glass in it, innit... And yes there is an extra charge because it is posher....!!

It's the same as we don't have patio's anymore...they're 'Terraces don't you know dahling'...*smile* 

Footings all done as is a beautiful 200 year-old yellow stock brick wall matching the 200 year-old stock bricked house so I'm certainly not going for PVCU Geoff thanks anyway.

A flat-roofed modern but with Georgian hint is what I'm looking for and big enough to serve hot sausage rolls in the dry to all our Herts Area mulled-wine wanderers each year...

I thought a 10 or 12 inched double joist with metal sandwich flitch would hold up 7X2 joists at a 4.2M span but don't have any calcs to prove it... tis the need for a struc engineer...

Anyone?

paulalexander1963
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Can you put up a rough sketch of the walls and windows and where roof could bear onto ?
Tony Whitley
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Terraces. Noted.

  Freestyle Caterham #1
dikko
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If the cut and paste works.......?? if there's nothing below, it didn't...

dikko
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Left-hand wall out from rear wall 3.9m, 4m high at present.

flitch beam 4.2m across from end of above.

Another flitch beam out from house wall 3.9m, both to meet steel plate and steel upright.

All glass below (a nice new frameless slide and swing back door system) - looks good.

Apart from roof that's it...! D

dikko
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I've gone to the Inst of Struc Engs web and have contacted a man who might help (when/if he gets back to me) so, to all those who have anguished over my little project you can now relax...  Yes unless of course it's too little a £challenge for him...

Ta.

1360rallye
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I used these folks earlier this year when we went open plan and had to replace a steel beam.  Ours was the simplest scenario but the site has a multitude of options.  It cost us £49, got a response in under 24hrs as well as quick responses to subsequent questions re alternative beam dimensions

https://www.beamcalculation.co.uk/

Andrew