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A staircase jig is a woodworking tool that incorporates both a right angle and an acute angle in its design. The jig is easily transported due to its small size and light weight. Precise
A staircase jig is a woodworking tool that incorporates both a right angle and an acute angle in its design. The jig is easily transported due to its small size and light weight. Precise measurements
Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events.
In other words, measurement is a process of determining how large or small a physical quantity is as compared ...
are required to layout
Layout may refer to:
* Page layout, the arrangement of visual elements on a page
** Comprehensive layout (comp), a proposed page layout presented by a designer to their client
* Layout (computing), the process of calculating the position of ob ...
the diagonal
In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge. Informally, any sloping line is called diagonal. The word ''diagonal'' derives from the ancient Gree ...
locations.
This jig uses a zero reference line from which the rise and tread are measured. The upper part of the jig is a right triangle
A right triangle (American English) or right-angled triangle ( British), or more formally an orthogonal triangle, formerly called a rectangled triangle ( grc, ὀρθόσγωνία, lit=upright angle), is a triangle in which one angle is a right ...
with a roundover overhang. The template allows for a tight fit of the tread into the stringer in the overhang section. The bottom of the jig incorporates an acute angle. This tapered angle allows a space for a wedge to fit against the back side of the vertical and the horizontal plane
In astronomy, geography, and related sciences and contexts, a '' direction'' or '' plane'' passing by a given point is said to be vertical if it contains the local gravity direction at that point.
Conversely, a direction or plane is said to be h ...
of the stringer. This jig can be used to lay out different rise (vertical) and tread (horizontal) widths. The jig is used with a plunge router and a bushing guide. The router plows out a precise groove into the finished product that allows all the parts to fit together.
Uses of jig
The jig is used to make finish stringers, in interior staircase fabrication. The stringer is also referred to as a skirtboard. It can be used in a closed staircase or an open staircase where one side of the staircase is exposed and the other is housed into the skirtboard.Design of jigs
The jig in the image is designed to cut only one segment of the stringer at a time. Some industrial staircase jigsFine woodworking, Tilt-Top Table, Mario Rodriquez, pg. 74, No. 173, 2004 are designed to cut out an entire stringer in one setup. There are jigs to cut dovetails, mortise & tenon joints, box joints, keyed miters, finger joints, bridle joints, scarf joints, and many other joints. All these jigs add precision, consistency, and productivity to a job.See also
*Sharpening jig
A sharpening jig is often used when sharpening woodworking tools. Many of the tools used in woodworking have steel blades which are sharpened to a fine edge. A cutting edge is created on the blade at the point at which two surfaces of the bla ...
*Tapering jig
A tapering jig is a woodworking jig used to cut a progressively deeper cut along a workpiece usually parallel to the grain.
Tapering jigs are often used to create table legs, with the taper usually cut into the two sides of the leg facing the in ...
References
{{Woodworking Woodworking jigs Construction equipment