Figure 13.13 represents a tower crane used by Tomas J. Contracting to handle materials at construction sites. The weight, W, is hoisted to the desired height and then moved along the boom AE from 6 ? x ? 86. The counterweight, CW, weighs 8 500 lbm, and the crane motor and cab weigh 2 400 lbm acting at B. The crane structure weighs 5 500 lbm and can be considered to be acting at G.
Pins at C and D secure the crane base. gL = 32.174 0 ft/s².
(a) If the weight to be lifted, W, is
3 200 lbm, plot the reactions at C and D versus the distance x.
(b) Find the points where the loads at C and D are maximum and size the pins required. Each pin is in double shear and is made from stainless steel with a factor of safety of 5.0 based on ultimate strength.
(c) If the load, W, is increased to 4 200 lbm, determine if this load can be lifted safely with the pin sizes calculated and, if so, the range of x for which it is possible.
 FIGURE 1.png)
 figure 2.png)
 figure 3.png)
 FIGURE 4.png)
 ANSWER.png)
You might also like to view...
________ are a basic embryo type found in seeds where the embryo occupies most of the seed and the cotyledons function as storage reserve tissue.
Fill in the blank(s) with the appropriate word(s).
Which improper operation can lead to air in column?
A) Rapid changes in column control and set points B) Opening a bleed valve on a vacuum column C) No cooling liquid on condenser D) Operation of column bottoms level too high or too low
The sum of all the angles of any triangle is _____ degrees.
a. 90 b. 180 c. 270 d. 360
Epigeous germination occurs when the epicotyl emerges and cotyledons remain below the soil surface
Indicate whether the statement is true or false