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String lines are basic hand tools used in masonry and woodworking to create straight lines between two reference points. Plumb bobs, flush lines, and chalk lines are variations of this tool. They help prevent sagging or tilting in a structure and are often based on personal preference and the task at hand.
A string line is one of the oldest and most basic hand tools and is commonly used in masonry and woodworking to help the user create a straight line between two reference points. The shortest distance between two points is a straight line, and a chord allows the user to mark the shortest distance, which helps prevent sagging or tilting in a structure. A tool that is hundreds of years old, a plumb bob is typically used in conjunction with a plumb bob, commonly referred to as a plumb bob, or is chalked.
Both a flush and plumb line are useful for drawing straight vertical lines. Used with a plumb bob, which is a weighted object with a pointed tip attached to the end of the string, the user must mark reference points along the line between the start point and end point. This allows the mason or carpenter to keep a straight line as he works and gives him other places to work. A string level can also be used to create a straight, level horizontal line.
A chalk line is another version of this tool. A small box contains a piece of retractable string which, when wound inside, is coated with powdered plaster. There is a hook at the end of the line to attach it to a point and as the line is stretched between the two points to be marked, the user pinches or snaps the string. The chalk covered line then transfers a visible line onto your work surface. This is a useful tool for marking horizontal lines once the start and end points have been determined.
A chord line is also sometimes used in surveying, but in many cases laser equipment has replaced it for this purpose. The use of a plumb line or chalk line is often based on personal preference and the task at hand.
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