what do we mean by maximum lifting capacity of a crane?
597479
That the crane should lift, at the most, this weight.\n\nIf it lifts beyond its capacity, there could be a catastophic failure.
677948
You will get most of this from the Manual Handling regs themselves.\n\nThe main issues are identifying the tasks ahead of time as manual handling is one of the least predictable tasks due to differences in the operator [not all lifters are created equal!], the load [balanced, stable, always the same?]and the prevailing conditions [lifted from same height etc].  There is also the significant 'human' component ranging from competition between loaders (not wanting to be seen to lift less even if not-capable) to not following method statements.\n\nHope this helps
314786
k, the carrying capacity, is measured by population surveys if you assume the population is already at k.  If it's not at k, then you'd have to do some work such as protecting an area against harvest and determining the population of that area every year then determine k for the whole bay based on that.  Actually it's pretty hard to know k in real life, it's more of an abstract guess by ecologists.
479141
Here is a little to get you started.\n\nhttp://www.construction-equipment.info/construction-cranes.html?source=yahoo&campaign=395323\n\nhttp://en.wikipedia.org/wiki/Crane_(machine)
420480
The swl of the crane is  14T so you need 2 crane (combines lift 2 x14T =28T,\nThe 40' container 1s 25T.\nYou need 2 crane operators to work in tandem to safety execute the operation.\nYour crane operators are competent to carry out the job and you do not mess up with them cause you do not have adequate knowledge on lifting
104294
Performance\nBase Number of Cylinders: 8 Base Engine Size: 7.5 liters\nBase Engine Type: V8 Horsepower: 245 hp\nMax Horsepower: 4000 rpm Torque: 395 ft-lbs.\nMax Torque: 2400 rpm Maximum Payload: 4655 lbs.\nMaximum Towing Capacity: 12500 lbs. Drive Type: RWD
973902
Generally there are several areas that engineers usually have to decide, but this depends on what the engineer is trying to do.\n\nFor instance if something is safety critical (i.e. a crane or bridge or tower), then they will choose to make something much stronger than it needs to be.\n\nSay a crane expected to see a max load of 10,000lbs.  The design might actually be able to support a load of 15,000, but you tell the public that 10,000 is the safe limit.  This is called factor of safety and engineers almost always want to be conservative.\n\nNow an engineer could design it to support 100,000 lbs, but this would make the crane much more expensive than it needs to be.  So what happens is they compromise with 15,000 pounds because it is safe enough and not as expensive.\n\n\nAnother topic would be tolerances.  For instance, you want a rod 1 foot long.  I the real world, it's impossible to get something exactly 1 foot long.  We can get close, 1.001 is easy to do, but why do you need such precision if something that is 1.2 feet long will do.  \n\nSo in many cases you see tolerancing on dimensions, 1 +/- .003. That means something from 0.997 to 1.003 is acceptable.  If you want something much closer, say 1.0001, then it'll be much more expensive because it's more difficult to make.\n\n\nHope this helps.
1131414
No, crane can not lift itself (unless you mean can it pick another crane up, then answer is yes, of course: as you did not ask if the crane can pick itself up)\n\nYou can also be a 'crane'. You can pick a dog up, maybe the same weight as you!.. but you can not pick yourself up (maybe part of you, like your leg, your arm)\n\nthere are many different cranes, go to a building site and see (or see the web site I gave you below) \n\nWhuch crane you talking about?\n\n*Types of crane \n*Ancient crane\n*Medieval crane\n*Railroad crane\n*Mobile crane \n*Telescopic crane \n*Tower crane \n*Truck-mounted crane \n*Rough terrain crane \n*Crawler crane \n*Loader crane \n*Gantry crane \n*Overhead crane \n*Stacker crane \n*Floating crane \n\nMost NB for crane is its stability (it was found them tipping over):\nIn order for a crane to be stable the sum of all moments about any point such as the base of the crane must equate to zero. In practise the magnitude and combination of anticipated loads is increased so that a crane should have a factor of safety against toppling of about ten times (it is based on leverage)\n\nhope it answered you,\nbest regards\nDesert
1137202
Cosidering that the load (2P) has been applied to the midpoint of the bar, the load which will be carried by each cantilever beam will be 'P'.\nIn that case, the maximum deflection at the free edge of the system will be  \n\n(P*L*L*L )/ (3EI)\nwhere L is the span of each beam \nEI is the flexural rigidity
254925
I'm assuming that the pivot point will land between the 15 and 30 Kg loads because it seems more logical. If you try putting the X distance between the 20 and 15 loads, you'd probably get a negative distance. \n\nActually, the weights have to be multiplied by the pull of gravity (9.81m/ss) to make them actual forces but then again, they would all just cancel out.\n\ni hope you understand the crude diagram\n\n|-------10------|       - distance where weight of beam is applied\n|---------x-------|    - pivot point dist from left\n ____________________  - beam (20 m)\n|_________|__________|\n20_______15_________30 - applied forces (weights)\n\n20kg(X) + 15kg(X-10m)  = 30kg(20m-X)\n20kgX + 15kgX - 150kgm = 600kgm - 30kgX\n20kgX + 15kgX + 30kgX  = 600kgm + 150kgm\n                65kgX  = 750kgm\n                    X  = 750kgm/65kg\n                    X  = 11.53846 m from left end
927180
Here are the rules as far as I know...\n\n1. The maximum capacity of each shell is given by 2n^2 (where n is the shell number starting from the innermost shell)\n2. The maximum capacity of the last shell, regardless of the atom, is 8.\n3. The maximum capacity of the penultimate shell (the second last shell) is not more than 18.
196636
It is a designation of the load capacity of the truck.  How they came up with the numbers I am not sure, as they have no correlation to the capacity they represent.  Dodge and Chevy use two zeros at the end and ford uses one, with 15, 25 and 35 representing half ton, 3/4 ton and 1 ton respectively.  Up to that point the trucks are considered to be light duty (despite manufacturer designations to the contrary), with the numbers 45, 55 and 65 being medium duty and used for commercial chassis that may have the same cab as the light duty, but will have much more heavy duty components.  Medium duty chassis trucks may also be a frame and drivetrain only  with something like an RV or Bus body being put on top.  True heavy duty trucks are the big semis you see at the truck stops.  \n\nThe numbers used to be a measure of the weight capacity of the bed, but have since become a realative measure of bed/towing capacity with no exact correlation to specific weight.  For each increase in capacity designation, the truck has heavier duty components, such as suspensions, axles, frame and sometimes engine and transmission.  Most of the import trucks are considered to be half tons, however, like the domestics, actual capacity can vary greatly.  There are so many different configurations you can get a truck in now days, you almost need manufacturer literature to find out what the actual capacities of a given configuration will be.  Ford uses F as a prefix for all it's designations, while GM uses C for 2 wheel drive and K for four wheel drive.  I am not aware of a prefix used on Dodges.
141339
These cranes are built on hydroliclifts, that lift the crane up enough to remove a section of the tower.  The lifts, then lower the crane to repeat until each section has been removed to the crane itself, which is hoisted by another crane.
56048
May exceed 10,000 kg. The maximum published weight is 34,000 kg.
135226
It is said to have originated among construction workers. The "nine yards" is said to refer to the maximum capacity a cement-mixer truck can carry — nine cubic yards of cement.
231335
OSHA (US Organization) sets the limit at 70 lbs (or 32Kg).  You must be a freakin gorilla if you sling around 260Kg (or 572lbs) at work.
975778
Define high pressure. Define high capacity.\n\nAre these reciprocating or centrifugal compressors?