Laying Out Stair Stringers

This will establish the starting point for the stringer. The above example shows outside drop-mounted stairs.

Learn How To Build Stairs

It can also be useful for cutting the angle on the top of the stair rail pickets.

Laying out stair stringers. Stringers can be confusing especially to a novice so make sure you always keep the rise and run on the framing square oriented in the same direction as the progression of your layout. Youll need at least one stringer for every 16 inches of stair width. Stairs and Landings - Landings are used to break up runs of stairs.

Tracing Out First Unit Rises and Unit Runs on Stringer. To lay out your stringers you need to know your precise step rise and run which varies depending on the height of your deck. Determine the total rise for your stairs using a level and a tape measure.

Measure the distance from the top of the deck surface to the top of the stair landing. Get a carpenters framing square and if you have little buttons that clamp or screw onto the square even better. Lay a straight piece of 2x12 on sawhorses.

Laying out and cutting the stringers With the rise and run calculated you can set up a framing square to mark out the stair notches on the stringer as seen in the photos below. Cut them precisely and they create level steps spaced consistently apart. To grasp the theory behind stairs it helps to understand some stair-building terms.

A complete discussion and demonstration of how to measure and cut stair stringers for a deck or porch or other use. First the distance from deck to ground -- the total rise -- is measured. Look for straight stock with as few knots as possible.

Stringer Length - the stringer length calculation is the minimum length of 2x12 material that is required to layout and cut the stringer. Laying it out is the first and toughest step in building stairs. You use a framing square to draw the stairs notches on the stringer then you cut them out.

The main framing member that runs at a diagonal and supports the stairs. Laying out the stringer. The essence of laying out stair stringers is straightforward.

Clamp a straight length of scrap wood leftover trim stock works well to a framing square with the woods edge registered to the rise and run measurements. There are often flaws at the very end of the board that can interfere with the gauges so place the riser gauge in a bit from the end of the board. If youre using synthetic decking for the treads some manufacturers require stringers to be spaced no more than 12 inches apart.

In this case we are laying out and cutting an open stringer which is cut in a stepped pattern of vertical and horizontal cuts. Stringers work in the background providing a strong support structure for stairs. Building code states that the minimum width of a landing should not be less than the width of the flight of stairs that is served.

Part 1 of a 3 part series- How to calculate the rise and run for stair stringers. Stringer or carriage. Watch the whole process start to finish.

Tips for Laying Out a Stair Stringer. The stringerthat notched framing member that supports the treads and risersis typically made of pressure-treated 212. The vertical measurement of each individual step on the stringer.

Start by laying out the top of the stringer. Align the rise and run measurements on the square with the edge of the stringer. If youve done the math its grade-school stuff and the layout right the tread cuts will be level and the riser cuts plumb.

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