If a template is not available, what tool can you use to measure pieces for your lay-up?

The ruler is an ideal choice for measuring pieces for a lay-up when a template is not available. Rulers provide a straight edge that helps ensure accurate measurements of length and width, which is essential in aerospace assembly processes. They often come marked with various units of measurement, allowing for precise readings that are vital for fabricating components that meet strict tolerances.

Using a ruler can enhance productivity by allowing quick and easy measurements without the complexities that some other tools may involve. For example, while measuring tape can measure larger dimensions effectively, it is more flexible and less precise for small adjustments compared to a ruler. Calipers are primarily used for internal and external measurements or for measuring depths and would typically be used in cases where a finer measurement is required. Protractors, on the other hand, are intended for measuring and drawing angles, making them irrelevant for linear measurements in lay-up scenarios. Hence, the ruler stands out as the systematic and versatile tool needed for this task.