Tower Crane TC7021 Large Cranes Leg Base

Tower Crane TC7021 Large Cranes Leg Base System 1

Tower Crane TC7021 Large Cranes Leg Base System 2

Tower Crane TC7021 Large Cranes Leg Base System 3

Tower Crane TC7021 Large Cranes Leg Base

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 1 unit

Supply Capability:: 30 unit/month

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Specification

Maximum Lifting Weight:

12T

Maximum Lifting Height（M）:

200M

Rated Loading Capacity:

2.1M

Span:

70M

Rated Load Moment:

250T.M

Detail of Tower Crane

Feature:Tower Crane

Condition:New

Model Number:TC7021(QTZ250)

Place of Origin: China (Mainland)

Brand Name: CMAX

Certification: ISO,CE

Warranty: 1 Year

Application:Building,Construction,Industrial

Main Features of Tower Crane

Our tower crane is self-erecting and wall-attached tower crane, in addition to it's advanced parameters, reliable performance, well-looking appearance, and excellent quality.

It has characteristica such as long boom, largeworking coverage, hydraulic rising, and tandem mounted tower body.

It's design idea shows advantages including simple structure and good applicability, convenient maintainability, and lower price at the same time to emphasize meeting the requirement from construction units at different levels.

It's lifting height is obviously increased thanks to its self-erecting and wall attached function.

Specification of Tower Crane

Technical Sheet for TC7021

Free standing height (m)		50
Max height with attachment (m)		200
Working range can be adjusted（m）		40、45、50、55、60、65、70
Min working range（m）		2.5
Max lifting capacity（t）		12
Tip load @ 70m（t）		2.1
Hoist mechanism (VFD+PLC)	Falls	2		4
	Lifting capacity（t）	0－3	0－6	0－6	0－12
	Speed（m/min）	0－80	0－40	0－40	0－20
	Motor	YZPBF250-4-55KW
Trolleying mechanism (VFD+PLC)	Speed（m/min）	0-56
	Motor	YPBE132M-4-7.5KW
Slewing mechanism (VFD+PLC)	Speed（r/min）	0-0.6
	Motor	YLEW112M-6-120N.M×2
Climbing speed（m/min）		0.5
Counterweight（t）		23.6
Mast section size（L×W×H）m		2×2×3
Working temperature		-40－+60℃
Total power (KW)		95
Power supply requirement (KVA)		255KVA for generator
Cable type ( within 30 meters from site power source to lower electric box of tower crane )		50mm2（3+2, 5 cores）
Startup voltage & current		380V×95%=361V 260A
Rated working voltage & current		380V 146A

Loading diagram：

70m jib length：

R			18	22	24.5	27.7	28.3	30	32	35	37	40
a=2 (t)	6t—31.8m								5.96	5.35	5.00	4.54
a=4 (t)	12t—17.8m		11.29	8.99	7.94	6.86	6.69	6.23	5.76	5.15	4.80	4.34
R	42	45	47	50	52	55	57	60	62	65	67	70
a=2 (t)	4.27	3.91	3.69	3.40	3.23	2.99	2.84	2.64	2.52	2.35	2.25	2.10
a=4 (t)	4.07	3.71	3.49	3.20	3.03	2.79	2.64	2.44	2.32	2.15	2.05	1.90

65m jib length：

R			20	22	25	27.7	30	31.8	32.4	35	35.9	37
a=2 (t)	6t—35.9m											5.79
a=4 (t)	12t—19.23m		11.49	10.32	8.92	7.92	7.21	6.72	6.57	5.99	5.80	5.59
R	40	42	45	47	50	52	55	57	60	62	65
a=2 (t)	5.27	4.96	4.56	4.31	3.99	3.79	3.52	3.35	3.13	2.99	2.80
a=4 (t)	5.07	4.76	4.36	4.11	3.79	3.59	3.32	3.15	2.93	2.79	2.60

60m jib length：

R			22	25	27	30.6	31.8	32.4	35	37	40
a=2 (t)	6t—39.85m											5.98
a=4 (t)	12t—21.35m		11.60	10.05	9.21	7.96	7.61	7.45	6.79	6.35	5.78
R	42	45	47	50	52	55	57	60
a=2 (t)	5.64	5.18	4.91	4.55	4.33	4.03	3.85	3.60
a=4 (t)	5.44	4.98	4.71	4.35	4.13	3.83	3.65	3.40

55m jib length：

R		23	25	27	29	32.8	33.7	34.3	35	37	39
a=2 (t)	6t—42.70m
a=4 (t)	12t—22.87m	11.92	10.86	9.96	9.18	7.96	7.71	7.55	7.37	6.90	6.48
R	41	43	45	47	49	51	53	55
a=2 (t)	6t—42.70m	5.95	5.63	5.34	5.08	4.84	4.61	4.40
a=4 (t)	6.10	5.75	5.43	5.14	4.88	4.64	4.41	4.20

50m jib length：

R			24		26	28	30	33.1	34.7	35.4	38
a=2 (t)	6t—43m
a=4 (t)	12t—23.04m		11.46		10.48	9.63	8.90	7.94	7.51	7.34	6.74
R	40	42	44		46	48	50
a=2 (t)	6t—43m			5.84	5.53	5.26	5.00
a=4 (t)	6.34	5.97	5.64		5.33	5.06	4.80

45m jib length：

R			25	27	29	31	33.6	34.9	35.6	37
a=2 (t)	6t—43.75m
a=4 (t)	12t—23.42m		11.16	10.23	9.43	8.74	7.96	7.61	7.44	7.10
R	39	41	43	45
a=2 (t)	6t—43.75m			5.80
a=4 (t)	6.67	6.28	5.92	5.60

40m jib length：

R		24	26	28	30	32	34.1	35.1	35.8	38	40
a=2 (t)	6t—40m
a=4 (t)	12t—23.8m	11.90	10.88	10.01	9.25	8.59	7.98	7.71	7.53	7.02	6.60

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FAQ about Tower Crane

Q: What kind of steel used for tower crane ?

A: Normally, as for the main force bearing steel structure, Q345B is adopted; as for the assistance force bearing steel structure Q235B is adopted. All of the raw material is outsourced from qualified steel factory in China.

Q: What about our tower crane warranty?

A: Usually there is one-year quality warranty including main electronic parts (not including consumable parts). There are consumable spare parts together with whole machine and normally they are enough for one year.

Q: What is 3 main mechanism of the tower crane ?

A: there are trolleying mechanism/ slewing mechanism/ hoisting mechanism.

Q: This is a new technology in ringging work. Hope anyone can give me some detail information about wireless crane scale.: Hi, okorder for more information

Q: Well I folded 100 or so cranes from cheap origami paper (red, yellow, green and blue) before I decided that I could fold 1000 cranes a reality. My dilemma is, do I keep the 100 cranes I did and fold 900 of them to fulfill my wish? Or if I discard the 100 cranes and fold 1000, will my wish be granted on the 900th crane? The reason I want to discard the 100 cranes is because it's for my wedding and the color placement of the old cranes isn't fitting at all.Yes I'm aware it's not scientific or realistic, but it's more of faith, I'm not dumb.: Consider what you would like your 100 cranes to mean. Attach strings to your 100 cranes and then hang them in a tree etc so that the wind may carry your prayers where they need to go. Then start again to create the 1000 paper cranes you want for your wedding. PS: The making of the paper cranes involves an act of faith, not the right colour to match your wedding plans. In Japan, the crane represents peace and healing. When we consider the famous Japanese art-form of paper folding (origami) the crane comes to mind before all else. Sadako and the Thousand Paper Cranes (1977), a non-fiction children’s book written by American author Eleanor Coerr, tells the story of young Sadako Sasaki who lived in Hiroshima at the time of the atomic bombing. Sadako developed leukaemia as a consequence, and lived out the remainder of her short life in a nursing home desperately trying to create one thousand paper cranes. Supposedly, if someone could make a thousand paper cranes his/her wish would come true. Sadako wanted to live. Sadly, she only managed to fold 644 cranes. After her death, friends and family folded the remainder, and buried her with the one thousand paper birds. Today, a statue of Sadako holding an enormous golden origami crane stands in the Hiroshima Peace Park. People regularly leave paper cranes. The plaque on the statue reads “This is our cry. This is our prayer. Peace on Earth.”

Q: Because they look a lot alike. Such as if you reinforced the design a little bit will it work?: It might - but the center of gravity and the tripod might not be able to hold the weight of the jib, camera, counter-weights... and personally, I think it would be a pretty expensive mistake to watch my $2,000 camcorder fall and brake because the camera crane collapsed under the weight. A mic tripod is designed to handle about a pound of weight. A consumer camcorder, the jib and counterweights (and maybe a mic or whatever else you throw on there) can be between 5 pounds and 50 pounds. That's why companies like Kessler make what they make. And that's why the companies that makes lesser camera cranes (Cobra, CameraCranes, and others) never use a mic tripod. They use a heavy duty camera tripod or other LARGE, STRONG, item - not a mic stand.

Q: how do u build a hydraulic crane using syringes. it's a science project. can u give me websites or if u know details.: Do okorder

Q: we have a project starting that will require a stack built 1km high in the air?How will they install this?: use a heavy lift helicopter, these are especially designed for this work

Q: what do you think happened to ichabod crane?: I heard he went our for smokes and never came back.

Q: Why are there extra placards attached to the tower crane tower?: 2. after adding the placard, it will increase the windward area of the tower crane and increase the wind load of the tower crane, so that it will deviate from the calculation load when the tower crane is designed, and will affect the safe use of tower crane.

Q: A. Load capacityB. Fluid leaksC. Clearance for swing radiusD. Wire rope wear and sheavesE. All of the above must be inspected before operating a crane: A. Load capacity and C. Clearance for swing radius have nothing to do with a Crane inspection. ______________________________________... E. All of the above must be inspected before operating a crane. Is a totally different question. Before operating a crane, B. Fluid leaks C. Clearance for swing radius D. Wire rope wear and sheaves need inspection. Wingman

Q: Does anyone know where I can locate a print or lithograph of the chromolithograph done in the 1850's of William John WIlgus' Ichabod Crane and the Headless Horseman?: Ichabod Crane, Respectfully Dedicated to Washington Irving. by William J. Wilgus, artist chromolithograph, c.