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Arun K. Bhimani, S.E.PresidentLiftech Consultants Inc.www.liftech.net
Twin 40 Dockside Cranes and Associated Terminal Operations
AAPA Facilities Engineering Seminar - 2007
Robert Johansen, P.E.Planning DirectorDMJM HARRIS – AECOM
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Presentation Outline
Twin 40 Dockside Cranes – Arun BhimaniTerminal Operations – Bob JohansenSummaryComments – Q & A
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Outline - Twin 40 Dockside Cranes
General InformationHead Blocks and CouplingHead Block StowageOperational IssuesDesign Considerations
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General Information
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Typical Dimensions
Rail Gauge 100 ft typical, some 115 ftOutreach 200 – 225 ftBackreach 50 – 75 ftLift Height 136 ftOverall Width 88.5 ft
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Lift Capacity – Under Spreader
Up t
o 4
0 t
80 t Total
Up t
o 6
0 t
30 t
30 t
30 t
30 t
30 t
30 t
Up t
o 4
0 t
120 t Total80 t Total
Metric Tons
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SpeedsMain Hoist
60 t Single Lift 245 - 295 fpm40 t Single Lift 310 fpm80 t Tandem Lift 245 - 310 fpm
Empty 500 fpm
Trolley 800 fpm
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Crane Weights – Metric Tons
Single Hoist DHT40 Increase
61 t 80 t
Dead Load 1455 t 1860 tTrolley 27 t 50 tHB + Spreader 18 t 40 tTotal 1500 t 1950 t 30%
Rope Towed Trolley Crane in Typhoon Area
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Operating Wheel Loads – Seaside
- Rope Towed Trolley Crane in Hurricane Area - 8 Wheels per Corner
Type Single Hoist DHT40Increase
80 t
Service 42 k/ft 56 k/ft 33.3%Factored 60 k/ft 81 k/ft 37.5%(ASCE)
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Single Hoist
Bromma
Dual Hoist
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Single Hoist Twin 40AdvantagesUse with single hoist
cranesMultiple spreader suppliers
Disadvantages Remove twin 20 spreaderSpread sheaves on trolleyAdd twin 40 spreadersStore on ground when
throughSource: Bromma Presentation
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Dual Hoist Twin 40 (DHT40) - Shanghai
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Number of DHT40 Cranes – ZPMC
PRC Other* TotalDelivered 37 10 47On Order 31 49 80
Capacity 80 t 90%100 – 120 t 10%
* Primarily Dubai, Singapore
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DHT40 Machinery
Two Main HoistsOne Extended TrolleyComplex Dual Head BlocksSpecial Operator Controls
WS Hoist LS Hoist
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Extended TrolleyWatersideSheaves
LandsideSheaves
Two HB PowerCable Reels
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DHT 40 Head Blocks
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Operator’s Controls
Left Console 8 Foot Switches Right Console
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DHT Head Blocks
Waterside
Landside
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Waterside Headblock
Separating Cylinder
Pitch Cylinder
Yaw Cylinder
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Landside Headblock Ball clamp extended Ball clamp retracted
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Headblock Relative Motion Translation
Vertical offset
Separation and Relative Skew Control
500 mm
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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Head Block Stowage
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DHT40 – Headblock StowageFor single hoist operation, unused headblock and spreader “two blocked” to trolley
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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DHT40 Challenges
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DHT Operations
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Ship Side Landside
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Ideal Ship Stow
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Ideal Land Side OperationsBomb carts in positionExtra bomb carts in line behind Evenly stacked deck containersSame height containers
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Not an Ideal World
Efficient headblock uncoupling and re-coupling is required
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Bomb cart landing
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Simultaneous Entry Staggered Entry
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Head Block CouplingSpreaders close togetherand level while handling
two containers of the samesize and working within
cell guides
Spreaders repositionedwhile handling
two containers of differingsize
Spreaders spread apartand not level while handlingtwo containers of differing
size and spotting containersonto yard chassis
Hydraulic cylinderused to accommodate container geometry and
space the spreaders
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Productivity PotentialDHT40 is expected to be at least 50% more productive than a single lift crane.
Crane Type FEU PotentialSingle-Lift 25 – 30Dual-Hoist 35 – 45FEU – Forty-foot Equivalent Container Moves per Hour; Single Cycle
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Productivity Challenge
1. Efficient Head Block Coupling2. Operator’s controls3. Operator training4. Terminal infrastructure
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Design Considerations
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Fatigue Design Criteria – Single Hoist
Lift Capacity 61 tFatigue Load 38 t
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Fatigue Design Criteria – DHT40
Lift Capacity 60 t – Landside40 t – Seaside
Fatigue Load38 t – 4 x 106 Cycles; Landside
or50 t – 2 x106 Cycles; Total
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Fatigue Spectrum
Waterside
Single Cycles
Double Cycles
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Snag Load
Head block and empty spreader traveling at high speed striking the cell guide
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Summary – DHT CranesPredominantly 80 t Capacity
Landside 60 t, Seaside 40 tPremium Over Single Hoist
Weight 30%Wheel Loads 30% – 40%
Potential Productivity Increase 50%
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What is Next?Triple 40
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Triple 40100 t Total
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Triple 40
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Terminal Operations
Circa 1960
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Summary
Twin 40 Cranes are HerePrimarily Used for Trans-shipment HubsTwin 40 Content Average 20%
Increase over Single Hoist CraneWeight – 30%Wheel Loads – 35%
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SummaryDHT40 Crane Design still Evolving
Productivity Potential 50% Operator Training Infrastructure Planning
Is the DHT40 Crane For You?
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Your Comments
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Acknowledgements
Engineering and Operations PersonnelHutchison Port HoldingsYantian Int’l Container TerminalsModern Terminals LimitedDachan Bay Container TerminalsZPMCMcKay International Engineers
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Thank You
This presentation is available for download on our website:
www.liftech.net
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Quality Assurance Review:
Author: Arun Bhimani
Editor: Teresa Ferguson
Principal: Arun Bhimani
Liftech Consultants Inc. file data:
N:\Papers & Presentations\!Working\2007_AAPA_T40/AB tandem.ppt
Copyright 2007 by Liftech Consultants Inc. All rights reserved.
This material may not be duplicated without the written consent of Liftech Consultants Inc., except in the form of excerpts or quotations for the purposes of review.
The information included in this presentation may not be altered, copied, or used for any other project without written authorization from Liftech Consultants Inc. Anyone making use of the information assumes all liability arising from such use.