when you can not meet the requirements, should set the security protective layer

the construction should  not cross the vertical direction up and down in the same job .Lower operating position , should be in the upper height may fall outside the scope of the radius , when you can not meet the requirements, should set the security protective layer. a electric pallet trucks ariety of demolition work ( such as steel formwork scaffolding , etc. ) above shall not be removed when the following simultaneous clearing of ; material from the edge of the temporary storage place shall be not less than 1m.
building entrances, lifts and other officers to concentrate on the discharge port at the top,
Should be set protective shed . Protective shed length of not less than the height of falling objects protective radius requirements.
to participate in lifting operations personnel , including drivers , cranes, signal conductor , welders etc should be special operations personnel , must be through professional training, examination to obtain certification, and can be confirmed by the experience of persons in high places .
before large-scale lifting operations should be carefully survey the scene , according to the preparation power pallet jacks of engineering characteristics and operating environment of special programs, and technical director for approval by the enterprise , which include : on-site conditions and measures to project overview and construction technology , lifting machinery selection basis , lifting derrick design calculations , anchor design, the design of wire rope rigging letter selection , ground and road endurance requirements , component diagrams and stacked in place lifting process in a variety of protective measures.
lifting machinery to enter the scene after inspection and acceptance , reassemble the crane should be required to make a trial run , including static and dynamic load tests , and various safety devices sensitive to reliability testing. Derrick after assembly shall be approved by program try hanging test, confirmed to meet the requirements before use.