# How do you calculate stair stringers?

## How do you calculate stair stringers?

How do I calculate a stair stringer?

1. Start by finding the overall height that the staircase will be.
2. Decide the height or “rise” you’ll want for each step.
3. Divide the total height of the staircase by the height or “rise” you want for each step.

## What’s the best way to cut stair stringers?

Stringers should always be cut from 2x12s. Notching smaller stock doesn’t leave enough wood to safely carry the loads of a stair. When ordering stringers, allow about 14 inches of stringer length for each step. Look for straight stock with as few knots as possible.

How many stringers do I need for deck stairs?

Deck Stair Basics Deck stairs are typically made from 2 x 12 stringers spaced about 12 to 16 inches apart. They rest on a solid foundation and are attached to the deck with hangers. They have risers (also called toe kicks), treads and railings. The stairs should be at least 36 inches wide.

Can I use 2×8 for stair stringers?

It is acceptable and within building code guidelines to use either 2×10 or 2×12 dimensional lumber to create a set of stairs; however, a stair stringer should not be less than 3.5 inches wide at its narrowest point to provide adequate strength for the load the stairs will be supporting.

### How far apart should stringers be for stairs?

about 12 to 16 inches
Deck Stair Basics Deck stairs are typically made from 2 x 12 stringers spaced about 12 to 16 inches apart. They rest on a solid foundation and are attached to the deck with hangers. They have risers (also called toe kicks), treads and railings. The stairs should be at least 36 inches wide.

### What size board is used for stair stringers?

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).

What saw to use to cut stair stringers?

A circular saw is the cutting tool of choice for trimming out a stringer. It’s portable, easy to take right to the job site and quickly cuts through 1 1/2-inch-thick framing lumber. Stop the cut right at the intersection between the tread line and the riser line even though the cut will be incomplete.

#### Can you cut premade stair stringers?

But you can use pre-cut pressure-treated stair stringers. “It’s much simpler for a homeowner to use pre-cuts, instead of having to calculate exact cuts and cut a 2-by-12 to make stringers,” said Chris Doerfler, contractor sales representative at Lumber in Fallston.

#### Do deck stair stringers need support?

3 Answers. Stair stringers are normally designed to be supported at the top and bottom, with no further support needed.

What size of wood do I need to build stair stringers?

It is acceptable and within building code guidelines to use either 2×10 or 2×12 dimensional lumber to create a set of stairs; however, a stair stringer should not be less than 3.5 inches wide at its narrowest point to provide adequate strength for the load the stairs will be supporting.

How far apart do deck stair stringers need to be?

Deck stairs are typically made from 2 x 12 stringers spaced about 12 to 16 inches apart. They rest on a solid foundation and are attached to the deck with hangers. They have risers (also called toe kicks), treads and railings. The stairs should be at least 36 inches wide.

## How wide do stair stringers need to be?

Stair Stringers (7) Stair stringers form the backbone of a set of stairs. By code, stairs need to be at least 36″ wide. Although it’s usually possible to get away with just using two stringers, we recommend you add a third one down the middle.

## How do you cut set of stairs?

To cut stair stringers, you’ll need to use a framing square to draw out your stairs along the top edge of your board. Then, use a circular saw to cut the lines you marked on the wood, but always complete your cuts with a hand saw to avoid accidentally cutting too far.