Stair Stringer Speed Square

X 3 4 in up.

Stair stringer speed square. Scale matching the pointed ends of both layout bar and square. Measure 7 inches 18 cm from the center of the square on one arm to set the rise and 10 11 inches 25 28 cm on the other arm for the run. One of these tools will allow you to lay out consistent precise angles down the length of the board. Tom silva provides some of the basics of this tool in the ask toh segment how to use a speed square.

Handy magazine shows you how to build basic stair stringers. Pros recommend a width of 16 between stringers but depending on the stairs and the thickness of the tread that figure could be slightly higher. The rafter square commonly called a speed square a proprietary name like romex and kleenex is a tool used by carpenters for a variety of tasks. Here post frame builder kyle stumpenhorst shares his top 10 uses.

Use the adjustable angle square to transfer the short angle from the template onto the 2 inch by 4 inch stringers. Use a framing square to trace the stair pattern on your stringer board. A 42 wide outdoor set of stairs should have 3 stringers 2 x 12 typically. This creates a precise guide that helps make the layout accurate.

These stringers are tied into the framework of the landing in the same manner as though you were coming from the regular floor. Bolt large washer wing nut for bar assembly. Place layout bar under square along the 12 in. Big 12 speed square layout bar 3 16 in.

Using three winders each tread tapers from a wide to narrow but not pointed tread at inside of turn. Clamp a guide to the square. The square can be adjusted to match the angle by loosening the nut adjusting the angle and then tightening the nut. To make it easy to align the framing square on the stringer consistently clamp a straight wood strip to the square.

As for the length of the stringers take the total height the stairs need to be and square that value.