Laying Out Basic Stair Stringers
  1. Finding rise and run.
  2. Clamp a guide to the square.
  3. Find the crown.
  4. Lay out the first tread and the second riser.
  5. Lay out the second tread and the third riser.
  6. Mark the back of the top tread.
  7. Mark the plumb cut at the top of the stringer.
  8. Lay out the bottom riser.

Simply so, How much should a stair tread overhang the riser?

Nosings, the overhanging portion, must be curved with a radius under 0.56 inches. If the risers are solid, the nosing must project between 0.75 and 1.25 inches, and must be uniform between two stories, with variations of less than 0.375 inches. This applies to nosings on treads and landings.

Can you splice stair stringers? You can build a set of stairs to a maximum total rise of 12′ according to the code. Then you can cut out the stair stringer and splice together. Then screw or nail the splice together well. You should support the stair stringer with posts to take the bounce out, as mentioned in my How to Build Stairs articles.


25 Related Questions Answers Found

 

Can I use 2×8 for stair stringers?

You should attach 2×6 or 2×8 support framing under the rim flush to the bottom of the stringer. The stairs will hang here. For example, if each stair will be 6 3/8″ finished height, we will measure down 7 3/8″ to compensate for the missing stair tread.

How many stringers do I need for interior stairs?

Just the 2 side stringers are adequate if the stairs have closed risers, even if the treads are just 3/4″ wood. The riser helps support the tread. If the stairs have open risers, a 1-1/2″ thick tread can support a 300 lb. load in the middle with just the 2 side stringers.

Can you build stairs without stringers?

A traditional staircase built with stringers can be less than optimal for very wide stairs. Box steps instead are the preferred choice because they are simple and can be built to any length. If your deck is low and requires only a few stairs or even just one, then steps without stringers are the way to go.

How many stringers do I need for 40 inch stairs?

Cut stringers can be spaced no more than 18 inches on center, so a 3-foot-wide staircase needs three stringers, and a set of slightly wider stairs (say 3 feet 6 inches) needs four stringers. The maximum 18-inch spacing presumes treads of 5/4-inch wood decking or 2-by stock.

How do you attach stair stringers to a deck?

Attach the stringers to the deck using angle brackets and 3” galvanized deck screws. Cut a 2×6 board to fit snugly between the two stringers at their base. This will be used to fasten the stairs to the concrete pad. Place the board between the stringers and attach to stringers with 3” galvanized deck screws.

Do stair stringers need support?

It depends. Yes, the stringers need to be supported along their length, but they can span a few feet too, depending on 1) the width of the stairs, 2) the number of stringers, and 3) size of riser board. So, the interior stringers are actually supported by the riser board that spans from side-to-side.

What is the most comfortable angle for stairs?

The angle is based on the amount of space available, but is commonly determined by the rise and run of a stair. With a 7 inch riser and an 11 inch tread (this is usually a minimum) you get an angle of arctan(7/11) or 32 degrees. Most carpenters will simply use a framing square to figure this rather than doing trig.

Are stairs at 45 degrees?

How long can stair stringers be?

A child could easily fall to concrete below. Recommend balusters spaced no greater than 4 inches apart. Deck stair stringers are 9 feet long without center supports.

Can you splice stair stringers?

You need a stair stringer of about 18′, so I would get a 2×12 of 10′ and 8′ and splice them together with a 4′ splice: 2′ on each side of the joint, using a 2×12 as the splice. Put the splice on one side only and layout the opposite side. Then you can cut out the stair stringer and splice together.

What is the best rise and run for stairs?

The general rule (in the US) is 7-11 (a 7 inch rise and 11 inch run) (17.78cm-27.94cm). More exactly, no more than 7 3/4 inches (19.7cm) for the riser (vertical) and a minimum of 10 inches (25.4cm) for the tread (horizontal or step). You can find some more information here as well on other stair-related dimensions.

What is best wood for stairs?

Ideal woods for such treads include cherry, walnut, maple, beech, teak and oak. Painted treads can be constructed from these hardwoods but may also include less expensive poplar and paint- or stain-grade pine.

What is code for deck stairs?

Now, some common code requirements, along with our recommendations: – The stair treads should be at least 36 inches wide. But, we recommend that stairs should be at least 48 inches wide so they don’t feel cramped. – The maximum allowable stair rise is 7 3/4 inches, and the minimum stair rise is 4 inches.

What is the code for stair stringers?

The building code (IRC, R311. 7 Stairways) is strict regarding stair layout and includes the minimum tread depth (10 inches), the maximum riser height (7 3/4 inches in the IRC, but this can vary by state), the maximum variance (typically 3/16 inch) between riser heights in a given stairway, and more.

How do you attach stair stringers to a house?

Attach the stringers to the deck using angle brackets and 3” galvanized deck screws. Cut a 2×6 board to fit snugly between the two stringers at their base. This will be used to fasten the stairs to the concrete pad. Place the board between the stringers and attach to stringers with 3” galvanized deck screws.

How do you attach stair stringers to a house?

A stair stringer (also called ‘string’ or ‘stringer board’) is the housing on either side of a flight of stairs, into which the treads and risers are fixed. A staircase will have two stringers, one on either side of the steps.

What is the formula for building stairs?

Determining the Rise

You divide the height by 7 inches; if, say, the floor-to-floor distance is 8 feet, 10 inches (or 106 inches), then you’ll need 15 treads (106 divided by 7 equals 15.14). Next, you divide the height by the number of treads (15 into 106), producing the exact tread height (7.06 inches).

How much should a stair tread overhang the riser?

Standards. According to the IRC, the minimum tread depth must be 10 inches as measured horizontally on the flat surface of the step from one riser to the next.

What is the formula for building stairs?

Determining the Rise

You divide the height by 7 inches; if, say, the floor-to-floor distance is 8 feet, 10 inches (or 106 inches), then you’ll need 15 treads (106 divided by 7 equals 15.14). Next, you divide the height by the number of treads (15 into 106), producing the exact tread height (7.06 inches).

How do you calculate the angle of a staircase?

A common tool used to speed up the layout of a stair stringer will automatically set the correct stair angle.
  1. Set the bottom of a four-foot level on the surface of the floor where the stairs will end.
  2. Stretch a tape measure from the pencil line to the floor.
  3. Divide the rise by the ideal step height.

How do you build stairs with landing?

Treads and risers install should start at the bottom step. First the riser and then the tread. However, on the tread you leave a 1/4 inch gap on the back edge and then install the next riser. Your riser should be at least 1/2″ thick and the tread no less than 1″ thick.

What size lumber should I use for stair stringers?

The stair stringers are essentially the backbone of your staircase. Always use straight, high-quality, pressure-treated 2x12s for stair stringers. If you are planning on resting the stringer on the ground, make sure the wood has . 60 RET level.

How thick does a stair tread need to be?

As you may have noted from the sketches and text above, typically building codes for stairs specify minimum stair tread thickness (1″ if supported by a riser at front, or 1 1/2″ thick treads if the stairs are open-construction without risers), but they do not specify a maximum allowable tread thickness.

How thick does a stair tread need to be?

Use 10d – 1.5″ hot-dipped galvanized nails. Make sure the top of the stringers are level. Nail the stair stringer connectors into place. Then, nail the 2×12 stair stringers to the connector side flange and bottom.

What is the best wood to use for stairs?

7 Amazing Species of Wood That Makes Excellent Staircase Projects
  1. Red Oak. The most common species for wood stair parts in the U.S. is red oak, due to being plentiful and its forgiving nature.
  2. White Oak.
  3. Ash.
  4. African Mahogany.
  5. Cypress.
  6. American Cherry.
  7. Brazilian Cherry.

What is the best wood to use for stair treads?

Ideal woods for such treads include cherry, walnut, maple, beech, teak and oak. Painted treads can be constructed from these hardwoods but may also include less expensive poplar and paint- or stain-grade pine.

How many stringers do I need for 5 foot wide stairs?

This means you will need to install a minimum of four stringers on any stairway wider than 36”. Always check the maximum span for your decking material as it applies to stair treads. Some composite materials and lower-grade 5/4 wood decking may require you to reduce the stringer spacing to 10” on center.

How much weight can a staircase hold?

We usually limit the weight to 1,000 pounds of safe weight. In our case, there is an additional 200 pounds worth of machine, and 300 pounds +/- of man weight. Since we are using a machine, we can get away with going on the high side, since there isn’t much movement on the stairs.

How thick is a stair riser?

Ideal woods for such treads include cherry, walnut, maple, beech, teak and oak. Painted treads can be constructed from these hardwoods but may also include less expensive poplar and paint- or stain-grade pine.

What is the stringer?

In journalism, a stringer is a freelance journalist, photographer, or videographer who contributes reports, photos, or videos to a news organization on an ongoing basis but is paid individually for each piece of published or broadcast work. The term is typically confined to news industry jargon.

How do you build deck stairs with pre made stringers?

Treads and risers install should start at the bottom step. First the riser and then the tread. However, on the tread you leave a 1/4 inch gap on the back edge and then install the next riser. Your riser should be at least 1/2″ thick and the tread no less than 1″ thick.