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3 Cards in this Set
- Front
- Back
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Types of cranes |
Crawlers Hydraulic trucks Lattice boom truck Rough terrain All terrain Heavy lift Tower |
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Erection of tower cranes. |
1. Crane hoists a new section of tower and moves it to the next tower 2. New tower section attached to erecting Tower section 3. Erecting tower section hydraulically jacks up the slewing ring and jibs and new section is positioned in erected tower 4. Hydraulic jacks are released and slewing rings and jibs are repositioned on extended tower |
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Tower crane selection based on |
Weight, dimension and lift radii of heaviest load Max free standing height of machine Max braced height of machine Hoist speed Length of cable that hoist can carry |
