The zigzag rule, also known as a folding ruler, is a useful tool for measuring tasks that don’t suit tape measures or retractable rulers. It was developed in the late 19th century and has been improved over time. Despite competition from high-tech metering solutions, it remains popular due to its simplicity, portability, and durability.
Popular with weekend carpenters and professional carpenters alike, the zigzag rule is a useful addition to any toolbox. Constructed with one-foot sections that fold into a compact design, this rule works well with measuring tasks that don’t easily lend themselves to the use of tape measures or retractable rulers. Sometimes referred to as a folding ruler, the zigzag ruler was developed in the late 19th century and quickly became an essential tool in the home and on construction sites.
Early versions of the zigzag rule were constructed of wood, with simple metal connections between each section of the rule. Part of the appeal of the simple construction allowed the folding rulers to be extended one section at a time, with each section snapping into place to form a level linear projection. The zigzag rule offered an improvement over the standard parameters, as the zigzag rule would provide a linear measurement out to six feet.
Improvements were made to the zigzag rule throughout the 20th century. Lightweight models built from aluminum began to compete with traditional wooden models. By mid-century, the rule’s linear measurement capability was improved with the addition of metric measurements. This simple innovation helped expand the consumer market for the rule while retaining the core audience.
Despite the proliferation of more high-tech metering solutions, the zig-zag rule continues to be a popular option for many types of construction projects. Both the traditional wooden ruler and aluminum versions of the ruler are still available for purchase at hardware stores and home improvement stores. Fitting easily into any toolbox, the rule requires no batteries or power source, is portable, and won’t break if accidentally dropped on concrete. For all of these reasons, it’s likely that the zigzag rule will continue to be a popular tool for many years to come.
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