A 4-T crane is used to lift a 3m x 1.2m x 200mm pre-cast panel. A spreader beam is needed to ensure the proper distribution of load in the lifting chains. Consider modulus of elasticity, E=200,000 MPa, allowable shearing stress of lifting pin is 50 MPa, the steel plate used in the spreader beam has an allowable bearing stress of 40 MPa. (All measurement in the figure is in millimeters) 1. Determine the total load in kN, the crane has to carry if the the lifting accessories (spreader beam, lifting chains and hooks) has a total mass of 720 kgs. 2. Determine the average normal stress on each leg of the lifting chain A and B.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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A 4-T crane is used to lift a 3m x 1.2m x 200mm pre-cast
panel. A spreader beam is needed to ensure the proper
distribution of load in the lifting chains. Consider
modulus of elasticity, E=200,000 MPa, allowable
shearing stress of lifting pin is 50 MPa, the steel plate
used in the spreader beam has an allowable bearing
stress of 40 MPa. (All measurement in the figure is in
millimeters)
1. Determine the total load in kN, the crane has to carry
the the lifting accessories (spreader beam, lifting chains
and hooks) has a total mass of 720 kgs.
if
2. Determine the average normal stress on each leg of
the lifting chain A and B.
Transcribed Image Text:A 4-T crane is used to lift a 3m x 1.2m x 200mm pre-cast panel. A spreader beam is needed to ensure the proper distribution of load in the lifting chains. Consider modulus of elasticity, E=200,000 MPa, allowable shearing stress of lifting pin is 50 MPa, the steel plate used in the spreader beam has an allowable bearing stress of 40 MPa. (All measurement in the figure is in millimeters) 1. Determine the total load in kN, the crane has to carry the the lifting accessories (spreader beam, lifting chains and hooks) has a total mass of 720 kgs. if 2. Determine the average normal stress on each leg of the lifting chain A and B.
22
Lifting Pin
450
450
450
450
Spreader Beam
1200
6.25
Lifting Pin
41
Lifting Chain Spot Detail
Pre-CastPanel
2,300 Kg/cu.m.
Spreader Beam Cross-Section
Side View
Front View
00
Lifting Chain B
000€
Transcribed Image Text:22 Lifting Pin 450 450 450 450 Spreader Beam 1200 6.25 Lifting Pin 41 Lifting Chain Spot Detail Pre-CastPanel 2,300 Kg/cu.m. Spreader Beam Cross-Section Side View Front View 00 Lifting Chain B 000€
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