how to bring down a tower crane after topping out a building · 2019-07-16 · how to bring down a...
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How to bring down a tower crane after topping out a building
presented byHeinz-Gert Kessel
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Integrated crane dismantling device of the 1960s
Hositing winch being lowered as last crane part by itself.
Liebherr 50HBmax. 7,0t
max. 5,6m
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General dismantling steps at buildings above 200m
With every step engineering work becomes more complex.
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Basic considerations for making the right choice
building shape / height / approved crane placement use of one climbing TC in multiple crane concepts foundation and design for assistant crane assembly / disassembly space pick / lowering / unloading zones component weights and requested radius hoisting height and drum capacity load „guide slip“ system first auxiliary equipment: derrick or recovery crane boom dismantling method for recovery crane downsizing in dismantling cycles allowed weight / dimensions for elevator 2D /3D site safety plan for all phases
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Individual planning of installation and dismantling steps
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Search for adequate foundation
Custom designed grillage with 4 anchoring points for the Jaso J80PA-RC
Three concrete foundation anchoring points for the A+K 3t recovery derrick
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Safe load lowering alongside the building facade
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Adequate safety features for working at extreme heights
secondary brakecat walks
display screen
wind speed sensor
hook levelsensor
examples Liebherr 200 DR 5/10
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Stiffleg derrick – the classic crane recovery device
Timberland ASD11-110 adjustable stiffleg derrick
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Liebherr 200 DR 5/10 Litronic –a combination of derrick and recovery crane
derrick configuration with outrigger extension and stifflegs
recovery crane only on compact outriggers
tower crane on 120HC tower system to gain height
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Jaso J80PA-RC multipurpose recovery crane
pedestal mounted version as recovery crane , suitable to be dismantled by Jaso J1540 derrick
self climbing version as standard luffing jib tower crane
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Downsizing in dismantling cycles
Step 1 Step 2 Step 3
example IHIexample Jaso
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Recovery crane – more than just a small tower crane
compact size with extreme short tail radius high hoisting winch drum capacity flexible base sections tower mount option Split deck design boom recovery items extensive self-dismantling devices small and light crane components
example Favelle Favco
Favelle Favco M370R
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The Japanese way to gain extra height for recovery cranes
turntable at the crane base
up to 16m climbing tower made up of 4m tower sections
climbing cage, tower sections inserted through the slewing ring
IHI JCC-180H
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Japanese self-erecting mini recovery cranes
Ogawa OJ-13N III
Ogawa OJ-13N
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Key technology of derigging the recovery crane boom
Conventional dismantling technology with derrick
Any solution when there is no roof space
recovery crane derrick
?WMD210 Shanghai 1998
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Folding jib to reduce dismantling space
Zhong Sheng ZSL380
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Vertical jib erection device for the Wolff 30A
If there is not enough space the jib can be jacked in vertical position.
piston
U-shaped climbing frame
boomsection
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Derigging the machinery deck of the recovery crane
The challenge: extreme operation height optimized lifts due to long hoisting time foot print sized working space limited capacity of assistant crane restricted location of assistant crane overall requested under hook height split up main crane components identify disassembly steps until equipment can be lowered by hand
Component size and weight matters !
ZSL380 recovery crane to be dismanteld by ZSL60 assistant crane
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Japanese way to reduce A-frame dismantling height
IHI JCC-V190SK
self-lowering
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Topless luffing recovery crane
Terex CDK 100-16
Lambri LDK303
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Variable ballast dismantling device
ballast removal as individual lifts or as one block
Wilbert WT175L e.tronic
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Dismantling of a recovery crane deck into tiny parts
Zhong Sheng ZSL120
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Thank you very much for your attention
Any questions?