3.1 Stair First Try!

Ramp, Stair, & Roof Vignettes and Multiple Choice

3.1 Stair First Try!

Postby samialj » Sat Aug 12, 2017 3:03 pm

This took me 50 minutes to finish.

Stair widths are 4'8" to accommodate the 48" clear requirement. All comments appreciated!

1st floor
Stair1a.jpg

2nd floor
Stair1b.jpg
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Re: 3.1 Stair First Try!

Postby samialj » Mon Aug 14, 2017 6:16 am

For the 1'-0" rail extensions for the stair and ramp, what is the proper way to model them? Should I be drawing one continuous rail with the 1-0" extension? Or should I break the rail at the bottom and top of the landing and then draw a 1-0" extension? Does it even matter? Thanks
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Re: 3.1 Stair First Try!

Postby spike » Mon Aug 14, 2017 12:42 pm

I don't think you can have area of refuge in the passageway. You seem to be showing your second area of refuge in the passageway
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Re: 3.1 Stair First Try!

Postby samialj » Mon Aug 14, 2017 2:55 pm

spike wrote:I don't think you can have area of refuge in the passageway. You seem to be showing your second area of refuge in the passageway


Yes, you are correct. You can't have an AOR in the passageway. But I am only showing one AOR. Don't pay attention to the sketch rectangles.
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Re: 3.1 Stair First Try!

Postby spike » Mon Aug 14, 2017 3:01 pm

don't you need two for this vignette?
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Re: 3.1 Stair First Try!

Postby samialj » Fri Aug 18, 2017 10:28 am

spike wrote:don't you need two for this vignette?


No I believe you just need one.

The program states: The area of refuge shall be sized to accommodate one wheelchair space for each 200 occupants...based on the stairway occupant load. The occupant load of the second floor is 220. Therefore, I believe you just need one.
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Re: 3.1 Stair First Try!

Postby Coach » Fri Aug 18, 2017 1:17 pm

220/2=110<200=1 AOR.
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Re: 3.1 Stair First Try!

Postby Coach » Fri Aug 18, 2017 1:19 pm

samialj wrote:Should I be drawing one continuous rail with the 1-0" extension?

Yes.
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Re: 3.1 Stair First Try!

Postby samialj » Fri Aug 18, 2017 1:39 pm

Thanks, Coach!
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Re: 3.1 Stair First Try!

Postby matt » Thu Sep 07, 2017 7:19 pm

If the code says there needs to be 1 AOR per 200 calculated occupants and the total occupants for a floor is 220, wouldn't you need to design for an additional AOR for those extra 20 occupants? We are exceeding 200 occupants per 1 AOR.

Looks like coach divided the 220 per floor, is that how it is done?
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Re: 3.1 Stair First Try!

Postby Coach » Thu Sep 07, 2017 8:08 pm

matt wrote:If the code says there needs to be 1 AOR per 200 calculated occupants and the total occupants for a floor is 220, wouldn't you need to design for an additional AOR for those extra 20 occupants? We are exceeding 200 occupants per 1 AOR.

Looks like coach divided the 220 per floor, is that how it is done?

Not per floor, per exit. The stair load is 1/2 of the 2nd floor load.
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Re: 3.1 Stair First Try!

Postby matt » Thu Sep 07, 2017 8:32 pm

But are there 2 exits here? I only see one on the first level
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Re: 3.1 Stair First Try!

Postby matt » Thu Sep 07, 2017 8:37 pm

It's in the program. Sorry, nevermind.

thanks
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