Jib Crane Apparatus
Product Code : EL-AMLE-10630
Quick Answer: The Jib Crane Apparatus is designed to study the forces in the elements of a jib crane, a planar central force system in which multiple forces act on a single point of application. A vertical metallic rod supports two attached elements, the jib (lower) and the tie (upper), with dial gauges connected to both to measure deformation when a load is applied via a hanger at their junction, producing tension in the tie and compression in the jib. The resultant cable force, tensile force, and compressive force can be determined both graphically, using a force parallelogram, and experimentally, with the occurring bar forces indicated by integrated spring balances.
The unit consists of a metallic rod that provides the support locations for the jib and tie, the two elements attached to the vertical rod; the lower element is called the jib and the upper element is termed the tie. Load is applied at the junction of the jib and tie via a hanger, producing tension in the tie and compression in the jib, and dial gauges connected to both elements measure the resulting deformation.
Based on the example of a crane jib, the resultant cable force, tensile force, and compressive force are determined both graphically and experimentally, with the directions and magnitudes of the forces found graphically by way of a force parallelogram. The crane jib itself is made up of a bar of adjustable length and a chain, attached by adjustable clamp elements to a retaining bar, allowing a variety of jib forms to be created; loads applied to the crane jib produce bar forces that are indicated by integrated spring balances.
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Last Updated: September 2026
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