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1. Mobile crane safety rules

2. Mobile crane safety rules
• Selection of mobile cranes steps :
• ( 1 ) to determine the position of the crane station car (amplitude ) was suspended in accordance with equipment or components seated position ,
and other site-specific conditions .
• ( 2 ) According to the lifting device or component is seated height, the device size, height and station car sling position ( amplitude ) , Charles Crane
characteristic curve , determine the arm length .
• ( 3 ) has been determined based on the magnitude , arm length , check the 150 ton crawler crane characteristic curve , determine the carrying
capacity of the crane .
• ( 4 ) If the weight is greater than the carrying capacity of the crane hoisting equipment or components , select qualified, or re-election.
•
• Characteristics of mobile cranes curve:
• Reflect mobile cranes lifting capacity varies with arm length , and the variation of the amplitude and mobile cranes with a maximum lifting height and
arm length , the variation of the amplitude change curve , called the crane characteristic curve. At present, some large cranes characteristic curve has
been quantized into tabular form , called the characteristic curve table . It is the basis for selection of mobile cranes .
•
• Mobile cranes use features:
• ( 1 ) Truck mounted crane. When lifting by crane support legs on the ground , with great maneuverability, its walking speed. But not lifting operations
conducted within the 360o range, the lifting area is restricted, the foundation ( or base ) located at the cable car station requirements are higher.
• ( 2 ) crawler crane . Using more general large-tonnage cranes , crane station located on the foundation 's requirements are relatively low , but
walking slower, shift the venue needed flatbed trailer. A large crane , to be demolished , transportation, installation transfer venue.
• ( 3 ) tire cranes . Cranes mounted on special chassis , running gear to support its tires, lifting operations for the legs , which features between the first
two of the question , in recent years, with less.
•
• Ground handling 100 ton mobile crane :
• Must be the foundation ( or base ) and acceptance test prior to lifting, according to the provisions of foundation settlement preload test . Lifting
heavy equipment on the ground complex , designed by professionals dedicated to the foundation , the same should be settling preload the
acceptance test .

3. Safe operation of lifting machinery
technology
• 1 , crane engine , electric motor and electrical, hydraulic equipment parts, should be performed JGJ33-2001 Section 3.1 , the provisions of Section 3.2
, Section 3.4 and Appendix C of .
• 2 , the operator must work before the job site environment , driving roads , overhead wires, buildings and component weight and distribution of a
comprehensive understanding.
• 3, the person in charge of the construction site should provide sufficient working space for the 100 ton crane for sale operation , remove or avoid the
boom and the rise and fall of the radius of gyration of obstacles.
• 4 , various types of cranes shall be equipped with a clear sound speakers, bells or whistles , such as signaling devices . In the boom , hook,
counterweights and other rotating body shall be marked with a distinctive color logo.
• 5, the lifting of the commanding officers must be certified , the job should closely cooperate with the operator , to implement the provisions of the
command signal. The operator should be operating in accordance with the commanding officers of the signal when the signal is unclear or wrong ,
the operator may refuse to perform .
• 6 , the crane cab off the ground , in the normal difficulty commanding ground and operational level ( altitude ) of walkie-talkies and other
commanding officers should adopt effective communication liaison be commanded .
• 7 , when there are six or more in the open air winds or heavy rain, snow , fog and other inclement weather , should stop lifting operations . After the
rain and snow before the job , you should try hanging, rear brake operation can be carried out to confirm sensitive and reliable .
• 8 , luffing crane indicator , torque limiter and a variety of travel limit switches and other safety devices should be in good condition complete,
sensitive and reliable , can not be adjusted or removed. Prohibited the use of limiters and limit device instead of steering mechanism .
• Before 9 , operating personnel crane slewing, luffing , actions such as walking and lifting hook should be audible signal indicate.
• 10 , when the crane operation , below the boom and heavy prohibited people stay , work or pass. When lifting weights , prohibited people from the
top of the pass. Crane carrying prohibited personnel .
• 11 , lifting the performance of the operator should be required of the job may not be overloaded. In exceptional circumstances when the need to
overload must undergo checking, there are technical measures to ensure the safety and write a special report approved by the person in charge of
enterprise technology , there is someone at the scene custody before operation.
• 12 , prohibited the use of cable-stayed crane , crane and lifting ramp buried underground or solidified on the ground as well asother unidentified
heavy weight objects. Cast in situ concrete structures or template, you must all be lifted after loose.
• 13 , lifting heavy objects should be banding smooth , firm, shall not be stacked or hung on a sporadic heavy objects . Easy scattered objects should be
used only after lifting hoists fence fixed . Location of an object marked with lashing after lashing lifting should be labeled . Sling angle should be used
with an object 45 ° ~ 60 °, and not less than 30 °, should be added between the sling and objects pad edges .
• 14 , lifting the load reaches the crane rated capacity of 90 % or more , lifting weights should first 200 ~ 500mm from the ground , the stability of the
crane inspection , reliability brakes , the weight of stability, firmness of lashing , in order to continue lifting after confirmation . Easy to shake for
weight should be tied rope .

4. • 15 , weight lifting and lowering speeds should be smooth , uniform, not a sudden braking. Turning around to be stable, while the former can not do
the reverse rotation is not completely stopped the action . Non- gravity drop cranes not load free fall .
• 16 , prohibited lifting weights for a long time hanging in the air , in the case of sudden failure of the job , you should take steps to place heavy objects
fall to a safe place and turn off the engine or overhaul after cutting the power. When a sudden power outage , you should immediately put all
controllers appropriated zero , disconnect the power switch, and take measures to make the weight down to the ground.
• 17 , the crane is not near overhead transmission line operations. Safe distance from any part of the crane and overhead transmission lines shall not
be less than specified in Table 1 .
• 18 , wire rope crane used documents technical performance and quality wire rope manufacturer should be issued . When there is no supporting
documents must be using after passing the test .
• 19 , the use of wire rope hoist , its structure , size and strength should be consistent with the type of 1 ton crane manual requirements. Rope and reel
should be firmly connected , when releasing the rope , the reel should be retained for at least three times, when the retractable rope to prevent the
rope hit the ring , kink , bend and chaos rope kink may not be used , deformation of the wire rope . Use rope braiding , plaiting their part in the
operation shall be by roll and pulleys.
• 20 , when knotted rope using a solid pick , plaited length of the portion of not less than 20 times the rope diameter should not be less than 300mm,
tying their part should be fine knotted wire . When using Shengka solid pick when matched with the rope diameter Shengka specifications, quantities
should comply with the requirements of Table 2. Finally, a length of rope from Shengka not less than 140mm. Shengka side saddle ( plywood ) should
carry the force when the rope , "U" bolts should be the end of the rope shall pros staggered . After the initial Shengka fixed rope should be tightened
again after the force , and should be tightened to make two highly flattened rope diameter of 1/ 3 . Operations should always check fastening .
• 21 , before the job class , joints should be checked rope and rope . When broken wire rope root reaches or exceeds the number in Table 3 in a pitch
should be scrapped . When the rope surface rust or wear make a significant reduction in rope diameter should be scrapped according to Table 3,
Table 4 reduction , according to the number of broken wires after retirement reduction .
• 22 , when the winding rope to the rotation of the reel , shall be guided by hand pull or foot rope . Lubricate the rope must be carried out after the
stop.
• 23 , crane hooks and rings welding is prohibited . When one of the following situations occur should be replaced :
• ⑴ surface crack, break ;
• ⑵ dangerous section and hook neck permanent deformation ;
• ⑶ lanyard worn over the height of the cross-section of 10% ;
• ⑷ hook bushing wear more than 50 % of the original thickness ;
• ⑸ mandrel ( pin ) worn more than 3 % to 5 % of its diameter.
• 24 , when the crane brake drum brake wear surface of 1.5 ~ 2.0mm ( small diameter take a small value , large diameter whichever is greater ) ,
replace the brake drum ; Similarly, when the crane brake wear than the thickness of the brake band 50 when % , replace the brake band .