Engineered drawing of staircase

[vrinner]

Does anyone know of/have an off the shelf staircase design that I could submit to my city. My building (steel) has a mezzanine but we did not put a staircase in the design. I just need a straight standard staircase drawing.

It would be a straight staircase the goes along the back wall. Kind of like this picture.

If floor is at 0 the bottom of the mezzanine beam is at 9'2" and the top of the beam is at 10". I will also be putting 1-1/8" tongue and groove plywood on top of the mezzanine beam.

The city wants something more formal than what I can give.

 

[matt_i]

They probably want to verify your rise + run to make sure its within walkable limits.

If you want stamped then you need a P.E.

If you want a CAD drawing then you'll have to DIY with software or pay someone to give you a .pdf or a .dxf compatible file. I'd get them both in case you ever need to manipulate the math data.

 

[readhead]

The rise and run and guard rail/ handrail have different requirements based on residential or commercial. Do the stairs need to be steel or wood?

 

[vrinner]

The rise and run and guard rail/ handrail have different requirements based on residential or commercial. Do the stairs need to be steel or wood?

This is residential. Wood is all I need. Just something basic.

 

[PugetDude]

Not a PE, just a guy who's built a lot of stairs.
I'd use (3) 2x12 (or parallam) stringers and 1-1/8 prefab OSB stair treads (or cut them out of the same plywood you're using for the floor sheathing.) Simpson hangers to attach it to a 2x12 bolted to the beam at the top.
Cut a piece of asphalt shingle, tack it under the lowest step to isolate the wood from the concrete floor.
Width needs to be a minimum of 36, for a garage stair I'd go to 42 to make it easier to carry stuff up and down.
Straight run, layout is simple.
Rise=120" + 1-1/8" sheathing= 121-1/8"
16 steps= 7.57" rise (very comfortable)
Run would be 10 x 16= 160"
Don't forget to drop the carriage 1-1/8" on the lowest step (subtract the thickness of the tread)to account for the 1-1/8" tread height.

I'm old school; lay it out on graph paper; (excel is also an easy way to do it) makes it easy to verify each tread/riser dimension to ensure it's going to fit. Just label each one and add them up.

Good luck.

 

[readhead]

PD is on the right track. The building department will also want a detail for the guardrail. For residential the rail has to be a minimum of 36" above the nose line and can serve as the handrail as well. Balusters cannot exceed 4" clear between. For residential stairs I doubt that you will need a stamp. Draw them yourself and see what happens. If you need some help PM me and I can detail it for you.

 

[Kevin54]

I'd sketch it if I could. I know the frustration when you need something.

 

[spudley]

PD is on the right track. The building department will also want a detail for the guardrail. For residential the rail has to be a minimum of 36" above the nose line and can serve as the handrail as well. Balusters cannot exceed 4" clear between. For residential stairs I doubt that you will need a stamp. Draw them yourself and see what happens. If you need some help PM me and I can detail it for you.

Now that made me smile. If I ever get to Durango, I'd like to buy you a beer.

 

[GMCGarage]

California and they dont want a PE Stamp??? Wow.

 

[RocketScott]

Blah blah blah...

You jerk, I sat here and calculated it all out then scrolled down and saw your response...

OP- This pretty well sums it up. They want to make sure it meets code. An engineer doesn't need calculate the loads on a staircase unless you're moving something special up there. Your drawing shows two extra risers.

 

[Homerr]

They may be just looking for a basic detail about life-safety and checking the box for covering the codes and need to see a detail covering rise, run, handrail, headroom. These typically don't show the entire run, just a short cross section of it. In this case just search images for 'stair detail'. Tailor it more with 'steel stair detail'.

It may not be about the structure or construction.

 

[vrinner]

Thanks everyone for the responses. I'm going to just hand draw something basic as suggested...they let me do that for my site plan and approved it so hopefully it will be enough.

I guess I was over thinking it all.