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A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline.
The most common type of T-square is a guide for drawing horizontal lines on a drawing board, and can guide a set square to draw vertical or diagonal lines. [27] Other types of T-square are used by woodworkers and glaziers for marking up sheet materials such as plywood, glass, and plasterboard. [1] [26]
Drawing callouts marked "KEY" define "key characteristics" that are considered especially important for fit, function, safety, or other reasons. They are thus subjected to higher inspection sampling levels. KPSI, kpsi: kilopounds per square inch, that is, thousands of pounds per square inch: See discussion at synonym KSI. KSI, ksi
One major set of engineering drawing standards is ... a pen width changing by approximately a factor of the square root of 2. A full set of pens would have the ...
An alternative to the T-square is the parallel bar which is permanently attached to the drawing board. It has a set of cables and pulleys to allow it to be positioned anywhere on the drawing surface while still remaining parallel to the bottom of the board. The drafting machine replaces the T-square and triangles.
The traditional tools of the architect were the drawing board or drafting table, T-square and set squares, protractor, compasses, pencil, and drawing pens of different types. [14] Drawings were made on vellum, coated linen, and tracing paper. Lettering would either be done by hand, mechanically using a stencil, or a combination of the two.
In addition to drawing horizontal lines, a T-square can be used with a set square to draw vertical or diagonal lines. [1] The T-square usually has a transparent edge made of plastic which should be free of nicks and cracks in order to provide smooth, straight lines. T-squares are also used in various industries, such as construction.
Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. These characters are characterized by being designed to be connected horizontally and/or vertically with adjacent characters, which requires proper alignment.
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