Sketches

--A freehand sketch is a drawing, made without the use of mechanical aids or devices. Sketches may be drawn on graph paper, traced, or drawn with a straightedge. A sketch may be of an object, an idea, or a combination of both. The ability to make quick, accurate sketches is helpful in conveying your ideas to others.

Two examples of freehand sketches are shown in figures 15-12 and 15-13. These sketches were

Figure 15-11.-Material symbols.

Figure 15-10.-Electrical power distribution symbols.

Figure 15-12.-Overlay plan sketch, emphasizing cut-and-fill areas.

Figure _15-13.-Overlay sketch, emphasizing temporary road and culvert.

developed from the original plan and profile sheet of a typical road project. They depict different earthwork phases to be considered by the EO when engaged in earthmoving operations.

The sketches shown in figures 15-12 and 15-13 were prepared by placing a piece of tracing paper directly over the plan and profile sheet and tracing the new road and stations. Information was added that was not included on the original plan and profile sheet, such as borrow pit, waste pit, stream, temporary haul road, temporary culverts, equipment area, planned cut-and-fill areas, and a typical road section. Any information may be included that allows you to visualize the finished product.