Early on in the construction of linear infrastructure, like roads, the notion of chainage (derived from Gunter’s Chain, which equaled 66 feet for homework, read more about Edmund Gunter to receive extra credit) came into play and chainage eventually became stations in our more modern vernacular. Surveying itself goes back to something on the order of 2700 BC with the Great Pyramid of Giza (seriously). Once you understand the format of it, you will see that it is very elegant, in a 1600s sort of way (the author hereby begs the pardon of all surveyors who were just insulted – surveying is an admirable, complicated, and precise exercise involving mathematics and possibly wizardry – we make fun only because we can’t do it). However you like, this is one of the ways surveyors locate very specific locations on the project site. Think of stationing as a form of accounting, or coordinates, or directions. That is our topic for today and these strange number arrangements are stationing. Sprinkled among many of these plans will be funny little numbers arranged as 7+00, 124+46, and even 1458+28.16. There are detour plans and signing/striping plans. There will be stormwater ponds and other best management practices. There are endless schedules of barrier, pipe, stormwater inlets, and manholes. There are plan views, section views, and profiles. There are many parts to a typical road or bridge plan set that take some getting used to. One of those that can stymie most of us at first is stationing. The point is, you learn construction plans by degrees and you pick up various pieces over time. Before long, you could nestle into a copy of James Michener’s Chesapeake with ease, all 865 pages. First, you had to learn how to talk, then learn the alphabet, then you had to read those Sam Likes Jam books to get your feet wet. But, so was reading when you were still learning how to use a fork properly. Reading plans can be daunting when you are starting out with construction projects.
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