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Non CE sheds
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<blockquote data-quote="designanddetail" data-source="post: 4425250" data-attributes="member: 43530"><p>You will always get different sized steels from different places for the same shed, all designed to the relevant BS codes. Some fabricators like heavier sections, with less actual fabrication to do, so less stiffeners etc, some like the steel as light as possible, but then need heavier more involved connection design, more bolts thicker end plates, rafter stays etc, and some engineers are lazy, the computer says size x,y,z so they put it down. Whereas a couple of small tweaks and you can get the sizes altered. I would also say 90% of all industrial warehouses that are consultant designed and go out for tender as that, are never built with those steel sizes. The fabricators re-design and run the sizes a lot closer to capacity, quite often the fabricators will take the design to within 5% of its capacity, whereas the consulting engineers will keep it with a 25% margin.</p><p></p><p>Also, most quotes seem to say, steel sizes assumed, but may alter upon completion of calculations.</p><p></p><p>Finally, quite a few fabricators never actually run any calcs, unless you ask for a copy, which you should always do. Quite easy to put an old calcs document in the ce folder which is not relevant to the job, the auditors do not read the calcs to see if they are correct or the correct steel is used.</p></blockquote><p></p>
[QUOTE="designanddetail, post: 4425250, member: 43530"] You will always get different sized steels from different places for the same shed, all designed to the relevant BS codes. Some fabricators like heavier sections, with less actual fabrication to do, so less stiffeners etc, some like the steel as light as possible, but then need heavier more involved connection design, more bolts thicker end plates, rafter stays etc, and some engineers are lazy, the computer says size x,y,z so they put it down. Whereas a couple of small tweaks and you can get the sizes altered. I would also say 90% of all industrial warehouses that are consultant designed and go out for tender as that, are never built with those steel sizes. The fabricators re-design and run the sizes a lot closer to capacity, quite often the fabricators will take the design to within 5% of its capacity, whereas the consulting engineers will keep it with a 25% margin. Also, most quotes seem to say, steel sizes assumed, but may alter upon completion of calculations. Finally, quite a few fabricators never actually run any calcs, unless you ask for a copy, which you should always do. Quite easy to put an old calcs document in the ce folder which is not relevant to the job, the auditors do not read the calcs to see if they are correct or the correct steel is used. [/QUOTE]
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