Emergency spiral staircase

Simulation Generality
1

Good evening

I need to make an emergency spiral staircase with a height of almost 14 meters and a step of 1500 mm (diameter of the staircase 3000 mm) and I want to know what is the best choice of round tube that needs it...

2

Good evening

Personally, I'll go for a tube Ø 273 x 6.3 S355J2H.

For the steps, 6/8 (with good gussets) or 8/10 tear plate.

You have to go to 2 UP for your stairs, there is no other emergency exit?

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3

Good evening

I think that a Ø between 160 and 200 should be good but it all depends if you have to add a dry column for the firefighters or not...  

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4

See this link among others

http://www.escalier-ehi.fr/escalier-helicoidal-industriel-grandes-hauteurs/#more-1442

See also the links that give some good info

There are a few standards to be met

@+ ;-)

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