Circles range in size from Vu inch (1.58 mm) up to 2 inches (50.8 mm) in diameter. The circle template is a very basic and highly useful timesaving device for drawing accurate circles of various sizes as well as curves that are parts of circles. There are templates that are used to draw circles, squares, windows, doors, electrical symbols, plumbing fixtures, furnishings, and hundreds of other features. There are a variety of templates available, some of which are used regularly, while others are needed for special purposes only. Templates help to speed up the drafting process and aid in the production of accurate drawings. Templates are prepunched patterns representing various shapes commonly used in interior design and architectural plans (Figure 2-7). They should not be used as a cutting edge as they are easy to nick, and they must be used and stored carefully. They are scratch-resistant and generally have good edge retention. Templates come in a variety of patterns and scales.Īble in a clear (nonyellowing) or colored plastic. ADJUSTABLE INKING EDGEįigure 2-7 Templates are used to speed up the drafting process by tracing the punched shapes directly onto a drawing. Shown on the left is a fixed 30-60 triangle on the right is an adjustable triangle. When used with a parallel bar or T-square, angular and vertical lines can be drawn. Shown on the left is a fixed 30-60 triangle on the right is an adjustable triangle.įigure 2-6 Triangles are also used to create straight lines when drawing. Triangles are avail-įigure 2-6 Triangles are also used to create straight lines when drawing. This keeps the edge up off of the paper so the ink doesn't run under the triangle and become smeared. Some triangles are available with recessed edges for use when inking. The adjustable triangle is convenient for situations requiring a variety of sloping lines, such as for stairs or slanted ceilings. For example, small triangles, such as 4 inches (101 mm), are useful for hand-lettering and crosshatching small areas.Īdjustable triangles can be set for any angle from 0 to 45 degrees. It is best to begin with these then larger and smaller sizes can be added as needed. ![]() Their size is based on the length of the longest side of the right angle. ![]() A range of sizes is available, with a size of 8 or 10 inches (203 x 254 mm) being in the middle of the range. The most common are 45-degree and 30/60-degree triangles, each named for the angles they form. TrianglesĪ triangle is a three-sided instrument used with the T-square or parallel straightedge for drawing vertical and angular lines (Figure 2-6). A variety of other drawing tools are available for constructing vertical or inclined lines as well as circles, curvilinear shapes not based on fixed-radius circular forms, and other special shapes such as representations of furniture, plumbing fixtures, and other interior equipment and furnishings.
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