pin—¹ A peg of wood, metal, or other material used especially for fastening or holding things together or as a support on which to hang things. ² A metal pin used for making taped measurements on the ground. A set consists of 11 pins.  Also called “chaining pin;” “taping pin;” “surveyor’s arrows;” “taping arrow.”

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Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

Part of LearnCST’s exam text bundle.