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Stair Stringer Design

Stair Stringer Design

Stair Stringer Design

(OP)
I am analyzing stair stringers as beams spanning between supports to get the sizes. Should the stringers/beams need to be considered as laterally braced as they have threads in between them ?

RE: Stair Stringer Design

I generally consider them as laterally braced by the stair treads.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Stair Stringer Design

Quote (Samwise Gamgee

... Should the stringers/beams need to be considered as laterally braced as they have threads in between them ?)


Depends on the type and supporting detail of threads , if the stringers curved or straight etc..Modelling the
stair stringers as beams spanning between supports would be reasonable approach..

RE: Stair Stringer Design

I agree with dik. The treads form a sort of vierendeel girder effect with braces the stringers.

See below simple guide

RE: Stair Stringer Design

(OP)
This is extremely helpful. Thank you so much guys

RE: Stair Stringer Design

MIS... do you have a better copy of the doc? Thanks

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Stair Stringer Design

Sorry about the quality dik. Just put it up from the phone today. I’ll upload properly next time I’m at the laptop.

RE: Stair Stringer Design

Thanks...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Stair Stringer Design

(OP)
Yeah MIS.. seems like a great resource to have. Please share it if this is a public resource.

RE: Stair Stringer Design

MIS... IMHO, the amount of passive restraint to prevent instabilities is very little, and I've never considered stairs to be anything but laterally supported. It is, however, handy to have a document that reflects/confirms the same thoughts.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Stair Stringer Design

I'll be honest and admit that I've never really considered this a concern.

Samwise, what are the dimensions of the stringers in question? What is the material being used?

RE: Stair Stringer Design

(OP)
The stringers I have currently are HSS12x4's and I am using Grade B tube sections.

RE: Stair Stringer Design

even less of a concern.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Stair Stringer Design

AISC Design Guide 34 has some good information about this topic.

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