TM 9-243USING A PLUMB BOBNOTEThe practice procedure which follows (forestablishing the true vertical of a post)uses a plumb bob with a removable head.The first step is to attach the cord as follows:1Insert a string or cord (1) into the cap (2) of theplumb bob. Make sure the cord will support theplumb bob. Pull the cord through the cap.2Place cap in the palm of your hand and tie anoverhand knot (3) in the cord. Pull the cord drawingthe knot against cap base. Make sure the knot is nottoo large or tied at an angle which would affect thehanging of the plumb bob.3Install cap into plumb bob body (4).4Tighten cap securely in the body and suspend theplumb bob by the cord only. Make sure the knot willsupport the plumb bob.11-3
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