(Hint, you will have to determine the maximum loads at A or B to compare
to the ultimate load strength of 30,000 lbs. Think about at which location
on the bridge the forklift will generate the maximum load between A and
B? Obviously, the max load is when the forklift is located on either A or B.
Use one and do the math. Compare your answer to the ultimate load and
find the safety factor. Compare the calculated safety factor to 4, is it safe
or not. Remember, safe means that the calculated safety factor should be
equal or greater than 4)
Fig: 1