08:02AM | 06/02/04
Member Since: 06/01/04
1 lifetime posts
I need to build stairs off my porch onto a new concrete patio. I can't get a carpenter to come until mid-July and now I'm worried about my kids' safety, so I'm diving in on this one. I've never built stairs before, but have done many small home improvements myself. The height from patio to entryway is 23". I'd like them to run the length of the porch (16 ft) and have a tread of 18". How do I calculate riser? The patio has a slight pitch for water run-off. Also, how many stringers wd I need? I like the look of the Trex treads and PVC risers. Anyone have advice/opinions? Thanks in advance.


12:08PM | 06/02/04
Member Since: 07/01/03
549 lifetime posts
Maybe this is a trick question, but the tread width does not affect the riser calculation. You have a vertical rise of 23 inches. Assuming 3-steps, the riser height is 7.666 inches (7-21/32) including the top surface. From the top of the lower step or patio to the bottom of the step subtract 1.5 inches nominal, assuming 2x lumber. The stringer will be cut with a riser height of 6-1/8 inches assuming the treads lay over the riser. 3 risers, 2 steps = 23 inch rise, 36 inch run.


06:40AM | 06/03/04
Member Since: 09/17/02
524 lifetime posts
Actually only the bottom one is 6 1/8 to compensate for no tread on patio. the others are still 7 21/32 because a tread goes on both the above and below step.

Here is a link I found about building stairs.


06:47PM | 06/03/04
Member Since: 12/27/02
543 lifetime posts
Look at my site's tutorial on deck stairs, my stair chart starts at 4' though.

Anyway, the 3 basic rules will interest you...

While you're there look at the Dr. K project in online projects, that has stairs similar to what you are wanting to do.

As for the Trex spacing, look at your measuring tape, you'll see a small diamond every 19+ inches, that is the spacing you'll need for the stringers 19.2 inches on center for 2x and 16" o/c for 5/4.

Alter Eagle Construction & Design
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon