A crawler crane will be located on a temporary work platform. The total resultant vertical load due to the weight of the crane plus the maximum material load it will pick on the project is 70,500 lbs (centered at the midpoint of the tracks), creating an overturning moment of 350,000 Ib-ft. The contact area beneath each track is 22' long and 30 inches wide, and the tracks are spaced 12'-6" apart (center-to-center of the tracks).
A crawler crane will be located on a temporary work platform. The total resultant vertical load due to the weight of the crane plus the maximum material load it will pick on the project is 70,500 lbs (centered at the midpoint of the tracks), creating an overturning moment of 350,000 Ib-ft. The contact area beneath each track is 22' long and 30 inches wide, and the tracks are spaced 12'-6" apart (center-to-center of the tracks).
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:6. A crawler crane will be located on a temporary work platform. The total resultant vertical load
due to the weight of the crane plus the maximum material load it will pick on the project is
70,500 Ibs (centered at the midpoint of the tracks), creating an overturning moment of 350,000
Ib-ft. The contact area beneath each track is 22' long and 30 inches wide, and the tracks are
spaced 12'-6" apart (center-to-center of the tracks).
а.
Draw the loading diagram for boom-over-front and identify all pertinent values. Use
units of psf.
b. Draw the loading diagram for boom-over-side and identify all pertinent values, again use
psf. Only draw the track with the greatest pressure for this part of the problem
For the condition where the crane is hoisting the load over its front (parallel to the
C.
tracks), what is the overturning moment that will create a triangular pressure
distribution under the tracks (where the length of the triangle is exactly equal to the
length of the tracks)? Assume the same resultant vertical load given above. Draw a
sketch of the loading diagram for this condition and identity pertinent values.
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