How heavy does a crane need to be to lift 5 tonnes?

Trying to find an estimated weight for a mobiles crane with a 5 tonne capacity ?
crane was built in 1959 if that makes any difference to design etc for any estimate.

What kind of energy/effort is used to power a crane?

i probably sound like an idiot asking this question :P
is it electricity? fossil fuel burning involved? pulleys? how does the pulley work? any human power involved?
specifically, how is it stupid to lift a chair that can be lifted by a person, with a crane?

How can you find industrial ratios for variety discount stores?

I have to do a financial analysis on Dollar General (DG) and I need to compare the industrial ratio’s to the DG ratios. I know how to get the company ratio’s but dont know where to get the industrial ratio’s or the data to figure them out. Thanks very much in advance.

Turning an origami crane into a hydralisk


This is my first youtube video so don’t be surprised about the quality. If any of you out there are starcraft fans then you may have seen the starcraft origami on Flikr or Digg. I’m not that guy, but I did design a hydralisk model. This model isn’t the best out there but it’s decent and can be made by converting the classic crane. I don’t know how to make instructions but you could probably figure it out from the video. Comment if you want me to make another video making the hydralisk from scratch (a square piece of paper of any size and almost any quality, I made this one out of scrap paper) and explaining it. BTW, I gave an example of this to those Penny-Arcade guys during Comic-Con. I also gave one to the Blizzard booth. They all said that I should make instructions but I think this way is better.

How do you go to the bathroom on a tower crane?

I can see peeing outside the cab but what happens if you get diareaha or have IBS while up in the cab of a tower crane?

How do I calculate my average power and my maximal power?

How do I calculate my average power and my maximal power?
I’m supposed to hand this in tomorrow and I’m going to freak out soon if nobody can explain to me how this is done.

All I remember my teacher saying about maximal power was something about running up a flight of stairs and measuring the height of each step and average power had something to do with counting all the calories you eat during one day … I think.

So can anybody explain these two things to me and tell me how to calculate them?

What simple macines are found in a crane?

For a project I have to label where simple machines are on a crane, it’s due tomorrow so I need to know which simple machines are on a crane and where.
3 people have submitted answers already. None of which are useful. Simple machines are lever, pulley, wedge , screw, inclined plane, and a wheel & axle. not engines and stuff that smart people Understand. I need to know which of the 6 simple machines are on a crane, and WHERE THEY ARE LOCATED!

Delta El Greco Ceiling Hoist

  • Efficient pulley system helps lift and lower heavier objects
  • Clever auto-locking mechanism prevents accidental release
  • Engineered for long durable performance, finished in tough silver powder coat
  • Max load 50-pounds

Product Description
The Delta El Greco Ceiling Hoist is a pulley system used to store bikes… More >>

Delta El Greco Ceiling Hoist

Black Striped BVD Diamond Shaped Industrial Barbell

Product Description
14 gauge surgical steel industrial barbell. This 38mm barbell works for multiple piercings. For the helix piercing simply insert each end of the barbell into each hole to wear. Remember, do not pull through the hole.. Specifications: 14 Gauge (1.6mm), 1 1/2″ (38mm), Black PVD Coated, 316L Surgical Grade Stainless Steel. Black Striped BVD Diamond Shaped Industrial Barbell… More >>

Black Striped BVD Diamond Shaped Industrial Barbell

What is the email address for the cartoonist Brian Crane?

I wanted the email address for the cartoonist Pickles by Brian Crane to find that golfing humor comic strip that ran in the newspapers. Maybe this would help. “How many strokes do you think? Two – one big drive and a short putt. Now killed the golf ball. Then said Now one heck of a putt!” I am still trying to find that comic strip but anyone has the email address, please let me know asap. Thanks!