Question

In: Civil Engineering

By now, you should have listened to the audio lecture, read the chapter, and taken the...

By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module.

  • Tower cranes have tall vertical, latticed masts or towers and horizontal booms called "jibs". There are several different types of jibs available for tower cranes. List at least three jibs and briefly describe each jib type.

Solutions

Expert Solution

There are different types of tower crane jibs available for various purposes namely- Luffing jib, fixed luffing jib, flat top jib, articulated jib, rear pivoted jib, Saddle jibs, A- frame jib etc..

The following are some of the types:

1. Luffing jib:-

  • These are adaptable tower cranes which can be used particularly on congested working spaces.
  • Luffing jib is capable to lower or rise with small slewing radius.
  • Tower cranes with luffing jibs are mainly used in larger projects where high lifting capacities are required with high accuracy and safety is considered.
  • One of the adavantage of tower cranes with luffing jibs are it can used with varying slewing radius, this does not create any accidental crash with other cranes on working site.

2. Rear pivoted luffing jib:

  • In this type, the jib pivot is loacted towards the rear of the top of tower and the hook is supported by hoist rope,
  • This jib has a smaller hook radius compared to normal luffing jib.

3. Fixed Luffing jibs:

  • These jibs are mounted on pivots at jib foot. In some of the fixed jibs, the hook radius is altered by moving saddle along the jib. Otherwise saddles are fixed in jib head and hook radius is also kept fixed.

4. Saddle Jibs:-

  • These are supported by pendants in horizontal position and hook is suspended from trolley along with jib.
  • These jibs can handle loads very closer to the crane tower since it has smaller minimum operating radius. Another adavntage is it is cheaper, easier to erect and dismantle comparred to normal luffing jib.

5. Flat top jib:-

  • Tower cranes with flat top jib are generally in sites with higher height restrictions.
  • One of the advanatge of cranes with flat top jibs -Capable to dismantle in air, thus it is suitable projects like power plants, cooling towers, bridges etc.

Ally Wells answered 1 year ago
Next > < Previous

Related Solutions

By now, you should have listened to the audio lecture, read the chapter, and taken the...
By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module. Clamshells are one of the special excavator types and sometimes clamshells are compared with draglines. List and discuss at least three different points between the two (Dragline vs. Clamshell) in terms of operations, productivity, etc. Do research on the internet,...
Read the lecture for Chapter 7, the following text and then answer the question at the...
Read the lecture for Chapter 7, the following text and then answer the question at the end. Notice the grading criteria this week is different than other weeks Constructors Constructor methods inside a class are methods that determine how an object is going to be created when some program instantiate one of them using the “new” clause. Their main use is to initialize the object’s instance variables. For example, last week I presented the Chair class that represented chairs. This...
Consumer Decision Process,, Read Chapter 5 or listen to the lecture video on Chapter 5 (under...
Consumer Decision Process,, Read Chapter 5 or listen to the lecture video on Chapter 5 (under Course Content for this week). The lecture video discusses the consumer decision model first.   Think of a product that you purchased within the past six (6) months. Answer these questions relative to the purchased product. Your answers should align with how these stages are done based on the consumer decision model in the text.  Your submission should be attached, NOT typed in the submission box....
Chapter 2 should be a review of previous economics classes you have taken. What do we...
Chapter 2 should be a review of previous economics classes you have taken. What do we expect to happen to market equilibrium price and quantity when demand increases? What about when supply decreases? (In other words, make sure you are familiar with the basic supply and demand model. You may want to play with the graphs on your own)
Indicate what considerations should be taken into account for a good design of an audio amplifier.
Indicate what considerations should be taken into account for a good design of an audio amplifier.
Unit 4: Discussion - Part 1 Question Read the lecture for Chapter 4, and then answer...
Unit 4: Discussion - Part 1 Question Read the lecture for Chapter 4, and then answer the following: Think of a brief example where you can use conditional statements and write it in correct Java syntax. You may use if-else-if statements or the switch statement. You may also use the example you wrote in pseudo code for the discussion thread 2 during week 2 and convert it to Java, if you think it is appropriate. Be mindful that we are...
Unit 4: Discussion - Part 2 No unread replies.No replies. Question Read the lecture for Chapter...
Unit 4: Discussion - Part 2 No unread replies.No replies. Question Read the lecture for Chapter 4, and then answer the following: This week covered the many different types of loops in Java: while, do, and for. Think of a brief example where you can use loops and write it in correct Java syntax. You may use the loop example you wrote in pseudo code for the discussion thread 2 during week 2 and convert it to Java, if you...
3. Recall Mohammad from the beginning of Chapter 37. Now that you have completed the chapter,...
3. Recall Mohammad from the beginning of Chapter 37. Now that you have completed the chapter, answer the following questions regarding his case. 1. Why is an accurate measurement and recording of Mohammad’s vital signs critical in this case? 2. After examining Mohammad and ordering and reviewing the results of an ECG test, Dr. Williams indicates that Mohammad’s heart appears to be normal. What factors might be contributing to Mohammad’s episodes of tachycardia? 3. The physician is going to give...
You have now read and learned about fiscal policy and the impact that it may have...
You have now read and learned about fiscal policy and the impact that it may have on our debt. With everything you have learned thus far, do you believe that fiscal policy is a good thing for the economy? In what ways may it be bad and/or good for the economy? If you could choose between Keynsian Fiscal Policy or letting the economy self-correct what would you choose?
Assume you have a WAV file containing an audio with noise. The audio was sampled with...
Assume you have a WAV file containing an audio with noise. The audio was sampled with a sampling frequency of 8ksamples/second. If you play the audio file, you will be able to notice that there is a small tune along with a strong noise. Design a digital filter using Matlab or Octave to remove the noise. Write the code showing all steps of designing a digital filter? Need help please
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT