10/27/2009 The Scenario • Client: The Christmas Empire • Development: The Christmas Tree doka – Building is in the shape of a “cone” – Vital statistics • Type of development: Shopping mall and office • Number of storey: 30 y • Height of building: 125m • Location: Waterfront, at CBD area • Expected opening date: 24 th December 2011 1 2 The Scenario • Constraints on core wall construction – Unconventional building shape – Limited space on ‐ site • Surrounded by existing buildings – Only one/no tower crane can be deployed – High wind ‐ speed g p – Tight construction schedule • specific date to be met – strictly no delays allowed! 3 4 1
10/27/2009 Overview Doka – The Formwork Experts • About us • More than 130 years experience , puts the dependability of tried ‐ and ‐ tested formworks d d bilit f t i d d t t d f k • Features of SKE 50 Plus concepts in place on each of your construction • How it works sites • Why Doka? • Case study • Conclusion 5 6 Doka around the world Revenue bar graphs 823 [+19%] [+19%] 690 [+24%] 556 [+19%] 469 414 [+13%] 394 [+5%] [+8%] Consolidated revenues 2002 – 2007 (mill. EUR) 7 8 109 Subsidiaries and 18 Representatives in more than 60 countries 2
10/27/2009 SKE 50 Plus • Crane ‐ independent climbing formwork li bi f k • All shape and heights • Ideal solution for any type of structure 9 10 SKE 50 Plus - Key figures Drive Hydraulically Loading capacity 50kN Features of SKE 50 Plus Pouring height 2,7 m - 5,5 m Max. wind speed during 72 km/h climbing Climbing speed 5 min/m I Inclination li ti +/- 15 degrees Wall system Large-area formwork Top 50 Framed formwork 11 12 3
10/27/2009 SKE 50 Plus - Components platform With just a remote control... system A B A ... Pouring platform B ... Wall formwork C ... Working platform C D ... Climbing profile E ... Suspension platform D E E The system is lifted! 13 14 Hydraulic equipments… Integrated ladder Hydraulic hose SKE 6,50m Hydraulic cylinder 24 Hydraulic unit Line distributor S, & M Pipe clamp Ladder to access different platform 15 16 4
10/27/2009 How SKE 50 Plus works? 1. Pouring first step 2. Pouring second step 3. First hydraulic climbing 4 4. Pouring third step P i thi d t 17 18 1. Pouring first step How SKE 50 Plus works? � Place formwork 1. Pouring first step � Assemble positioning � Assemble positioning points 2. Pouring second step � Reinforcement � Pour concrete 3. First hydraulic climbing 4 4. Pouring third step P i thi d t 19 20 5
10/27/2009 2. Pouring second step How SKE 50 Plus works? � Mount upper suspension 1. Pouring first step shoes shoes � Fix climbing scaffold 2. Pouring second step � Place formwork climbing scaffold 3. First hydraulic climbing 4. Pouring third step 4 P i thi d t 21 22 3. First hydraulic climbing 3. First hydraulic climbing � Hydraulic lifting of � Open formwork climbing profile � Clean formwork and � Disassemble lower platforms p suspension shoe i h � Assemble upper � Lifting of scaffold suspension shoe together with formwork � Fix climbing profile 23 24 6
10/27/2009 How SKE 50 Plus works? 4. Pouring third step � Fix suspension platforms 1. Pouring first step � Place formwork on one side � Place formwork on one side � Assemble positioning points 2. Pouring second step � Reinforcement 3. First hydraulic climbing � Close formwork � Pour 3 rd step 3 p 4. Pouring third step 4 P i thi d t 25 26 Dismantling of SKE 50 Plus • Use of tower crane The process cycle The process cycle • Time required: 2/3 of its assembling time continues for the successive walls… 27 28 7
10/27/2009 Limitation of Jumpform • 1 unit of jumpform can only be lifted by crane at a time t ti – � significant crane time is needed to lift all the units 29 30 Comparisons Comparisons Jumpform Automatic climbing formwork Jumpform Automatic Climbing formwork Flexibility of Little Improved: Drive Crane Hydraulically formwork ‐ height adaptability of suspended g p y p Lifting Requires coordination Little coordination is needed with platform operation between the crane operator remote control ‐ formwork is retractable 1m for and workers at the point of operating comfort installation ‐ Adjustable width, enclosed on all Lifting Restricted to one unit lifted Many platform units can be lifted at sides capacity at once by a crane the same time: commonly 20 units Loading Vary among 50kN Weather Weather Positioning by crane is Positioning by crane is Unaffected by wind speed of up to Unaffected by wind speed of up to capacity it diff different types t t conditions restricted by wind speed 72km/h since it is anchored to the Pre ‐ assembly Low level High level: wall formwork, working and structure in every situation suspension platforms 31 32 8
10/27/2009 Benefits of Doka Formwork Leverage on Expertise of Doka • A team of experts at • Leverage on the expertise of Doka Doka to provide • Flexibility • Flexibility engineered solutions • Independence of Crane – Maximization of value • Cost efficiency – reduction in added services – Manpower • Pre ‐ assembled custom – Equipment formwork formwork – Time • Cost Analysis • Safety 33 34 Flexibility Independence of Cranes • Reduce dependency where.. • Usable for different forms, shapes and height h d h i ht – Areas not within the reach of – Unlimited height the crane – Able to incline up to +/ ‐ 15 o – Unavailability of cranes due • Examples: to space constraints – Tallest building: Burj Dubai – Better usage of cranes for – Slanted building: Capital Gate Sl d b ildi C i l G other purposes 35 36 9
10/27/2009 Cost Efficiency – Manpower Cost Efficiency – Equipments • Hydraulic Lifting reduces • Hydraulic Lifting reduces the need manpower needed to hoist and for crane position � Maximizes the opportunity � Reduces the direct cost of manpower cost of crane usage � Manpower can be deployed for other work processes other work processes � E.g. no need for manpower to operate the crane and position the formwork 37 38 Cost Efficiency – Time Cost Analysis • Process of each cycle of core wall construction Fixed Cost made simpler made simpler ( ≈ 65%) Structural • Able to lift 20 units simultaneously unlike ( ≈ 33.33%) Variable Cost � Jumpform ‐ lift 1 formwork at a time ( ≈ 35%) • Therefore…. Construction M&E Services ( ≈ 33.33%) Cost Fixed cost : Fixed cost : � Overall cycle time is shorter � Overall cycle time is shorter Materials including concrete, rebar, formwork Architectural � Shorter time – less indirect cost Works Variable cost : � Incentives may be given if project is completed earlier ( ≈ 33.33%) Workers, rental, operations overheads 39 40 10
10/27/2009 Cost Analysis Cost Analysis • Variable cost of $11.55M Fixed Cost ( ≈ $21.45M) • For example, it takes one year to complete the Structural ( ≈ $ 33M) construction of the structural component, Variable Cost – The variable cost per day = $11.55M / 365 days ( ≈ $11.55M) Construction Cost M&E Services ≈ $32,000 ( ≈ $ 33M) (e.g. $100M) Fixed cost : Fixed cost : � If we can reduce the time taken to construct Materials including concrete, rebar, formwork Architectural the core wall, we could save a significant Works Variable cost : amount of money in terms of variable cost! ( ≈ $ 33M) Workers, rental, operations overheads 41 42 More benefits with Doka � Because… � Major competitors – lift much lesser units at a M j tit lift h l it t time • More time required to relocate the hydraulic unit for each lifting cycle • Alternatively, if hire more hydraulic units to lift all units at the same time, additional cost incurred • More space taken up by hydraulic units 43 44 11
10/27/2009 Worksite Accidents Worksite Accidents 45 46 Worksite Accidents Worksite Accidents • From the WSH Statistics Report Jan to Jun 2009 2009, – 3 in 10 of the fatalities were involved in a fall from height – 20% were struck by falling objects – Crane lifting operations account for more than half of the “struck by falling objects” cases 47 48 MOM and WSHC (2009). Workplace Safety and Health Statistics Report Jan to Jun 2009 . 12
10/27/2009 Safety features of SKE 50 Safety features of SKE 50 • Maximum safety • Maximum safety throughout all phases throughout all phases – wide working platforms TOP 50 – Climbing unit is – Comfortable width of walk ways always anchored in A C the concrete L0 Width of walking B 2,45m – Hydraulic jacks ways … L ‐ 1 2,70m 1,85m L ‐ 2 …1,00m L0 L ‐ 1 1,15m …0,80m …0,80 m L ‐ 2 …0,50 …0,50m m 49 50 Safety features of SKE 50 Safety features of SKE 50 • Maximum safety throughout all phases • Maximum safety throughout all phases – wider working between wall and formwork 1,00m 1 00 A A – Height of handrail post ( up to 2m) – Load capacity of 50 kN – Available of net housing and full B housing for protection 1,00m C Reinforcement Shoe assembly 51 52 98016-267-01 13
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