Información importante sobre cookies: Utilizamos cookies propias y de terceros para mejorar nuestros servicios. Si continuas navegando, consideramos que aceptas su uso. OK | Más información

Plumb bobs

A tool used to check the vertical position of surfaces. It is made up of a brass or bronze weight filled with lead and hung from a chord. At the other end of the chord it winds onto the axle of a wooden wheel. The wheel is positioned on a set point and the chord with the plumb bob is unwound. The completely immobile weight marks the vertical line.