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What precautions are lifting chain rigging
- 1. What precautions are lifting chain rigging
- 2. Lifting chain rigging points to note are what • 1 , the chain is not allowed in the course of knotted or twisted ; • 2, can not load with hook tip ; • 3 , chain rigging the normal operating temperature of -40 degrees to +200 degrees ; • 4 , leg rigging, 30 ton crane lifting point should be located vertically above the center of gravity of the object ; • 5,3 If the legs rigging , lifting objects hanging points should be located on both sides , lifting points above the center of gravity ; • 6, if the three- legged and four- legged rigging , rigging point should be uniform focus is on lifting the object level, pillar mounted jib crane and was hanging over the center of gravity .
- 3. Sling lifting rigging points to note • 1 Please note that in the course of the relationship between the angle between the carrying tonnage ; • 2, if the lifting sets of rigging used with damage , no use ; • 3, to avoid shock or vibration loading ; • 4 , the safety factor of 4:1 , 5:1 or 6:1 particular , materials lifting equipment the safety factor to be used within the range.
- 4. Hoist the specific requirements for environmental site • Hoist before the job , you need to inspect the site to explore the environment , but also the need for basic workplace layout and improved in order to ensure the smooth operation of electric hoist. • For the construction site should be flat , to " Stone one level" , the construction of water , electricity and gas to reach conditions of use ; another such encounter dark weather or foggy weather , should be on the scene with a reliable lighting / eye-catching lights , communications and fire protection facilities , fire exits and smooth ; installation of equipment to the construction site under construction and other systems have reliable isolation and isolation ; has spare parts, tools and construction materials, storage space , there should be a corresponding wind, rain , frost and other protective measures , inspection of parts, should not be installed in time temporary storage safekeeping ; and 20 ton electric chain hoist the main civil works related to the completion of the installation , lightning ground improvement.