Calculate the tension force in sling - lifting load, Civil Engineering

Calculate the Tension Force in Sling

The rigging configuration shown below will be used to lift a bridge girder using a 200-ton capacity luffing jib crane onto the foundation abutment.  The tension force (lb.) in Sling A is most nearly:

852_Calculate the Tension Force in Sling.png

Solution:

By inspection, the center of gravity of the load is offset causing an eccentric load condition.  The reaction load is heavier on the left side (RL).  The distribution of the 40,000-lbs load at RL is:   (40-ft ÷ 60-ft) (40,000-lbs) = 26,667-lbs.  The reaction force RL must be adjusted for the slope of the slings.  The vector force length of Sling A is √ 602 + 202 = 63.25-ft.  The force in Sling A is (63.25-ft ÷ 60-ft) (26,667-lbs) = 28,111-lbs

Posted Date: 5/29/2013 7:55:27 AM | Location : United States






Your posts are moderated
Related Questions
Total loss of prestress The total amount of losses of prestresses may be accounted for in a prestressed concrete member by adding different losses which may take place for tha

Explain Influence lines-reactions 1.  Remove the support under investigation 2.  Displace the beam vertically a distance of 1 unit.  The resulting beam shape will be the sha

Soil in Road Construction: Road Embankment and Sub-grade Soil is mainly used as the material for constructing a road embankment. The road embankment supports the road

Magnitude of torque - bending moment: A prismatic bar of hollow circular cross-section along with outer and inner diameters 100 mm and 80 mm correspondingly, carries a bending



Rolling - Binder: The layer thickness is 40-50 mm. Rolling is done in three stages : Initial Rolling By 80-100 kN smooth wheeled roller. Intermediate Rolling B

Q. Bleeding test for grout – an essential requirement? Bleeding is a form of segregation in that a layer of water migrates to surface of the grout at the time of the initial st

Q. Show the Continuous Piezocone Penetration Test? Continuous piezocone penetration test essentiallycomprises standard cone penetration test and a measurement of pore water pre

The total equipment cost for an addition to a pharmaceutical plant is estimated to be $5,000,000. The percentages provided in the Table represent the average expenditures in other