Model No: AM-015
This unit is designed to study forces in jib crane elements. Jib crane has two elements which are attached to a vertical rod. The lower element is called jib and the upper element is termed as tie. Load is applied at the junction of jib and tie to produce tension and compression in tie and jib respectively.
The unit consists of a metallic rod which provides the support locations for jib and tie. Load is applied via a hanger on the junction of jib and tie. To measure the deformation in jib and tie, dial gauges are connected to both elements.
a planar central force system in which multiple forces act on a single point of application. Based on the example of a crane jib, forces are determined graphically and experimentally: resultant cable force, tensile force, compressive force. The directions and magnitudes of the forces are determined graphically by way of a force parallelogram.
A bar of adjustable length and a chain make up the crane jib, which is attached by adjustable clamp elements to a retaining bar. A variety of jib forms can be created. Loads are applied to the crane jib. The occurring bar forces are indicated by integrated spring balances.
– Graphical breakdown of forces by force parallelogram
– Determination of the bar forces on various jib forms
– Comparison of: measurement result – calculation – graphical method
 Tensile and compressive forces in a planar central force system based on the example of a crane jib
 Various jib forms possible
 Integrated spring balances in the bars
 Max. load on crane jib 50N
 Loading with weights set, up to 50N
 Steel weights, surfaces galvanized
 Stainless steel retaining bar
 Sturdy metal frame
 Handles to aid transportation
 Box to house the components
Spring balance for tensile forces
– tensile force: 0…50N, graduations 0.5N
Spring balance for compressive forces
– pressure force: 0…50N, graduations 1N
– 1x 1N (hanger)
– 4x 1N
– 1x 5N
– 4x 10N
l x w x h: 600 x 200 x 670 mm
Weight: approx. 15 kg
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