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Old September 7th, 2006, 12:27 AM   #1
safqa_tijariya
 
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Japanese Cranes

Excuse me guys I just have a few questions to ask you about Japanese Cranes

if you don't know what im talking about here is a pic of J-cranes.




I would like to know are they more effective than normal cranes? (more accurate,faster,etc.?) give me details plz.

do you know which companies makes them and from where someone can buy them including their cost?

thanks a lot!

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Old September 7th, 2006, 06:18 AM   #2
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I don't know a thing about cranes, but those were manufactured by Ishikawajima-Harima heavy industries (IHI) http://www.ihi.co.jp/index-e.html





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Old September 7th, 2006, 11:44 AM   #3
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it seems like they would have higher efficiency than normal crann????
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Old September 7th, 2006, 04:58 PM   #4
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@ safqa_tijariya

The most probable rationale as to why the Japanese use these kinds of cranes is the landplot size of construction sites. I mean, Japanese cities are so dense that if ever there is on-going construction activity it would be in the middle of built-up developments. If Japanese construction sites within the urban cores of their cities had the same crane-technology as most parts of the world, it will be a safety hazard since normal cranes have longer arms or rather more horizontal arms since they are horizontally flat as opposed to the inclined Japanese cranes.

Now, if someone brings up an argument that my hypothesis about Japan's construction-cranes is wrong because Hong Kong uses the "normal" and/or commonly-used construction cranes even with its even greater density, I can only say this: they have totally different built-up area development patterns. Hong Kong's construction sites are, in fact, bigger since, more often than not, they are residential estates. These areas are not surrounded by a dense mess of low-rise apartments but are rather surrounded by a large empty area for green space and/or gardens that are part of the overall construction project upon completion. So, despite the numbers claiming that Hong Kong is denser than Tokyo, I say that Hong Kong's more efficiently organized built-up area development patterns in the form of well-arranged high-rise housing estates would somehow exceed the housing capacity of a dense mesh of low-rise detached private developments packed closely with one another.

So there you have it...
My very long answer to your inquiry.
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Old September 7th, 2006, 10:17 PM   #5
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I thank all of you guys and special thanks to Vapour you really gave me what I needed :

here is what the website says about those cranes:

Jib climbing cranes for building construction
IHI's large jib climbing cranes, featuring large payloads and working radius capabilities, are used in nearly all skyscraper construction in Japan.

What I colored in red is supposedly their advantage.
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Old September 8th, 2006, 11:08 AM   #6
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I didn't know Japanese cranes were so special.

These companies provide those cranes.
http://www.sc-m.jp/
http://www.sangyo-leasing.co.jp/index.htm

JCC-1500H, the largest one


JCC-1500H x 2, srrounded by JCC-900H x 4


JCC-1500H x 4
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