Q:There are a range of cranes to be selected for a particular type of job. Please provide any suitable method so that we narrow down our selection criteria .

What is the load weight? How high is the lift? Obstruction, possibly needing a jib? If you are placing a load onto a roof, how far from the edge of the roof is the load going to be placed? How far from the crane pivot is the load on the ground and how far are you going to to move the load away from the crane to place it in position? How close can you get the crane to the load and to the load placement site. The usual scenario is to call a crane outfit and they will ask you these questions over the phone or come to the site and discuss the lift with you. A crane is rated for maximum lift as close, usually 10 feet,to the cab pivot center. As the distance increases, the maximum load that can be lifted, decreases. Our 15 ton crane can pick 15 tons/ 30,000 pounds at 10 feet from pivot center. With the boom fully extended; the boom is 100 feet, at a 30 degree angle, it can pick up only 5,000 pounds. Inside of every crane cab should be a chart that shows the lift capacity at various boom angles and boom lengths. Also is included is a chart for the Jib, if the crane has one. Wingman

Q:what does dog everything mean in crane lift lingo?

it means to stop the crane from doing anything, just sit still untill otherwise told to carry on

Q:This is for a school project, we need a crane with yydraulics to pick up things for science.. Any ideas ?!

try okorder /

Q:how to calculate load capacity of crane?

Very complicated - strength of boom and tower, angle of boom and thus distance of load from base, size and position of counterweight, location of support arms. A specific crane may have different capacities depending on whether an extension boom is used (reaching higher and farther out with a reduced load)

Q:National standards for tower cranes

GB/T 5031-2008 GB 5144-2006 tower crane safety code for tower crane safety GB mechanical and electrical equipment thirty-second 5226.2-2002 mechanical parts: requirements for hoisting machines GB 5802-1986 lifting short chain hoists and other lifting equipment for the T (8) test specification level calibration chain GB 5905-1986 hoisting machine test code and procedures GB/T 5905-2011 crane and GB/T program 5972-1986 lifting wire rope for examination and discard utility specification GB/T 5972-2006 crane wire rope inspection and scrap utility specification GB/T 5972-2009 crane wire rope maintenance, maintenance, installation, inspection and disposal GB/T 5973-1986 wire rope with wedge joint GB/T 5973-2006 wire rope with wedge joint

Q:What are the safety devices in a tower crane?

(1) lift height limit position limiterFor cranes with variable boom angles, the lifting motion must be stopped immediately when the top of the lifting device rises to the 8OOmm at the lower end of the boom.For luffing cranes, lift the top of the hook to the lower end of the frame 500mm. The lifting movement must be stopped immediately.(2) lifting moment limiter and maximum lift limiter;When the lifting torque reaches 90% of its rated value, the lifting torque limiter shall be able to issue an acoustic or red light to indicate the alarm. When the lifting torque exceeds its rated value and reaches 108% of the rated value, the lifting direction and outward direction shall be stopped.If the weight and amplitude indicator are set, the numerical value should be correct, clear and eye-catching. The digital error shall not exceed 5% of the indicated value.When the lifting weight exceeds the maximum weight, maximum lifting weight limiter should emit light or sound alarm, when the load exceeds the maximum weight of 6%, should stop to enhance the direction of movement, but to allow institutions towards the down direction.(3) amplitude limiting deviceA crane shall be equipped with a minimum amplitude limiter and a device for preventing the boom from rebounding backward. The trolley must be equipped with a trolley switch and a terminal buffer.(4) rail clamping device and walking spacing deviceTrack type tower cranes must be equipped with rail clamps. A walking limit device shall be installed at the same time.(5) anemometer;For cranes with a hinge height of more than 50m at the root of the boom, a anemometer shall be installed at the top.(6) lightning protection and anti electromagnetic wave induction device;For the crane whose hinge height is over 50m, the lightning arrester shall be installed according to the actual situation and the electromagnetic interference shall be taken.(7) tower crane shall install limit torque coupling in order to prevent slewing overload.

Q:I need a answers to these questions for a school project.These questions are:-How and when did it occur when the Siberian White Crane got threatened and critically endangered?What are the causes of this environmental issue?What are the effects of this environmental issue?What has or is being done to prevent such and environmental issue occurring again?Thanks, it will really help me with my final mark.

Check okorder . There is some very interesting information at this site.

Q:how to pass a crane practical test?

Study or cheat.

Q:who invented them and why do people make them?

in Japanese folklore if you fold a 1000 origami cranes you get are granted a wish, usually concerning health/long life. The peace part comes from the story of Sadako Sasaki a victim of the Hiroshima atomic

Q:I'm folding 1000 origami cranes for my upcoming wedding. It's a tradition. I'm trying to find a website that can show me how to make the cranes into a large picture or an idea for a mobile. I found some sites that show pictures of each, but nothing with a how to on it.

from most of the pictures i saw, it seems pretty simple to figure out thinking of it logically. Origami cranes, string, wood sticks, Love and care. And with a bit of your own creativity and whatever supplies you can gather I think you will do a great thing. (making a paper crane now :)