Stair plans??


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Old 03-21-07, 09:45 AM
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Exclamation Stair plans??

I am trying to design stairs for a deck that is 15" high. Each step will be 5" high with the last one being the deck. This means that I need to build two steps. Instead of using stringers I want build it to look like 2 rectangle boxes. The bottom being longer and wider. Does anyone have plans to guide me on something like this or have a suggestion or book they would suggest for this type of stairs? I have been trying to come up with the plan to support these steps, but think I might be making it more complicated than it needs to be.
Thanks!
 
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Old 03-21-07, 01:44 PM
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Steps

Each box will have a finished height of 5 inches. A 2x4 turned on edge and 2x for the treads would give 5 inches high. If you want to use 1 inch thick tread material then the frame needs to be 4 inches high and would need to be ripped from stock wider than a 2x4 such as a 2x6. You could get 2 cuts out of a 2x10.

Decide on the step depth from front to back. If you want a 1 inch overhang on the front edge, make the top box depth(front to back) 1 inch less than the desired step depth. Make the bottom frame depth(front to back) twice the depth of the top frame.

Hope this helps. Good luck with your project.
 
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Old 03-21-07, 02:34 PM
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I am planning on using 1" deck board so I will need to make the supports 4" high. My question is...Do I build a box structure and lay the decking on it with a taller box in the middle for the second step? Do I need post under these boxes or should I anchor them to concrete?
I wish I could attach a sketch to better explain this. I'll probably just end up using trial and error.
Thanks for the help!
 
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Old 03-22-07, 03:43 PM
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Steps

The footprint for the bottom step covers the entire area of both steps. Then a second box the size of the second step sets on top of the bottom box. Make the frames out of 4 inch wide 2x lumber standing on edge. Add "joists" 16 inches apart to support the 1 inch boards, then nail or screw the boards to the frame.
 
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Old 03-24-07, 10:02 PM
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You'll probably regret making the steps 5" tall. At 15", I would make ONE step that is 7-1/2" above grade, or 7-1/2" below the deck height.
 
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Old 03-24-07, 10:11 PM
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Most areas require permits for decks and any changes to structure. If deck was not permitted it may not be to code. Contact your local Building Code Office re: permits and codes for decking. There are very specific codes re: steps. If you have not permitted your property in an area where permits are reinforced then you have set yourself up for issues at time of resale. Savvy buyers pull permits.
 
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Old 03-24-07, 10:30 PM
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twelvepole,

Good point about the permit issue. It varies from one jurisdiction to another. Where I'm at, if the deck is less than 30" above grade, then it's a "platform", not a deck, and no permit is required.

Two risers at 7-1/2" each is going to be more comfortable than 3 risers at 5" each, at least in my opinion. and a 7-1/2" riser is the same size as a 2X8. I always use the 'KISS' meathod whenever I can -- Keep It Simple Stupid!!
 
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Old 03-28-07, 02:39 PM
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Too late on the two step plan.
I ended up building the steps by making 2 platforms on top of each other. I also framed out each step with a skirt board with mitered corners. This way they will match the look of the deck. I had to make one set for the 15" side of the deck and one for the 17" high side of the deck. Giving them each 2 actually makes the deck look better.
I used the Riser: 4" min 7"max, Tread 11" min rule. This is what it states is best in the Architectual Graphic Standards book. (I'll probably skip a step, but kids might like to use them all safely)
No I didn't get a permit, but I did build it to code (probably over built it actually).
Once it is complete I plan to post the pictures since I have gotten lots of advice from this site! Thanks for all the help!!
 
 

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