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  2. Category:Rules of thumb - Wikipedia

    en.wikipedia.org/wiki/Category:Rules_of_thumb

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  3. 1:5:200 - Wikipedia

    en.wikipedia.org/wiki/1:5:200

    In the construction industry, the 1:5:200 rule (or 1:5:200 ratio) is a rule of thumb that states that: . If the initial construction costs of a building is 1, then its maintenance and operating costs over the years is 5, and the business operating costs (salary of people working in that building) is 200.

  4. Bridge maxims - Wikipedia

    en.wikipedia.org/wiki/Bridge_maxims

    Print/export Download as PDF; Printable version; In other projects ... A bridge maxim is a rule of thumb in contract bridge acting as a memory aid to best practice ...

  5. Middle-third rule - Wikipedia

    en.wikipedia.org/wiki/Middle-third_rule

    In civil engineering, the middle-third rule states that no tension is developed in a wall or foundation if the resultant force lies within the middle third of the structure. The rule is covered by various standard texts in the field of civil engineering, for instance Principles of Foundation Engineering by B.M. Das. [ 1 ] The application of ...

  6. Geometric dimensioning and tolerancing - Wikipedia

    en.wikipedia.org/wiki/Geometric_dimensioning_and...

    Example of true position geometric control defined by basic dimensions and datum features. Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof.

  7. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    An order from the engineering department (to be followed by the production department or vendor) overriding/superseding a detail on the drawing, which gets superseded with revised information. Also called by various other names, such as engineering change order (ECO), engineering change notice (ECN), drawing change notice (DCN), and so on.

  8. Civil drawing - Wikipedia

    en.wikipedia.org/wiki/Civil_drawing

    A civil drawing, or site drawing, is a type of technical drawing that shows information about grading, landscaping, or other site details. These drawings are intended to give a clear picture of all things in a construction site to a civil engineer .

  9. Plumb bob - Wikipedia

    en.wikipedia.org/wiki/Plumb_bob

    A plumb rule from Cassells' Carpentry and Joinery A plumb square from Cassells' Carpentry and Joinery. The plumb in plumb bob derives from Latin plumbum ('lead'), the material once used for the weighted bob at the end. [3] The adjective plumb developed by extension, as did the noun aplomb, from the notion of "standing upright".