Doka System

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    likely to be used and the desired type of concrete surface. In addition, the

    weight of the formwork is very important and it is to be set up without the

    use of a crane.

    SAFETY IN USING FORMWORK

    Safety is ensured if

    Components are light in weight for manual handling.

    Loose or dangling / hanging components are minimal.

    Minimum operations are involved in each reuse.

    Individual components are self standing.

    System facilitates fixing and removal at each location without the use

    of sophisticated tools and tackles.

    Usage of appropriate of tools

    Erection and dismantling is done as per the procedure or methodology

    Proper house keeping and stacking of materials

    Inspection of materials condition before usage

    Usage of appropriate PPEs

    Training to new comers

    TYPES OF PROPRIETARY SYSTEMS BASED ON COMPONENT

    MATERIALS

    All steel formwork

    Generally lightweight structural steel sections or sheet bent profiles

    are used as framework and steel sheets are used as sheathing. They are

    strong and durable if prevented from rusting. They can prove economical

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    since more reuses can be derived. However, as they are heavy, manual

    handling and frequent shifting may consume excessive labour.

    Steel and plywood formwork

    Framework uses steel and plywood that acts as sheathing. Normally,

    they are in the form of panels of standard sizes with provisions for fixing

    with adjacent ones. These panels are supported by steel flexural members

    (walers or soldiers), which are supported by form ties in wall formwork, slab

    staging and beam formwork. By using some suitable rigid clamping

    accessories among panels in wall formwork systems heavy steel supporting

    flexural members can be eliminated.

    Steel, plywood and timber beams

    Plywood is used as sheathing. It is supported at regular intervals by

    timber beams, which are further supported by steel flexural and axial

    members. Plywood with timber beams as their immediate supporting

    members have ample flexibility to suit a wide range of form geometry.

    Timber beams are light in weight and more in number, whereas steel is used

    where higher strength is required. Systems, in which the timber beams are

    engineered, produce good cost effectiveness. L&T uses glue laminated

    timber beams called H-beams, in most of its applications.

    All Aluminium formwork

    Panels use Aluminium in both sheathing and framework. If compared

    with steel, investment cost is higher and strength is less, but it is lighter and

    avoids rusting. However, it is susceptible to other corrosive attacks and

    requires careful handling to prevent from mechanical deformations.

    RELEASE AGENT

    A release agent is required to prevent adhesion between concrete and

    formwork.

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    Release agent is coated on the form surfaces by brush, roller or spray

    equipment before use.

    Release agents are more commonly known as mould oils or soap oils.

    As name implies, a release agents main purpose is to act as a partingagent and permit the forms to be easily removed away from the

    concrete during striking. This helps prevent damage occurring at both

    form and concrete surfaces; a very important fact in concrete

    construction. Certain release agents provide further additional benefits

    such as sealing effect on absorbent timber or ply forms, which produce

    more uniformly colored concrete. When smooth impermeable forms

    are used they can help prevent the formation of blow holes on the

    concrete face.

    There are several types of release agents and surface sealers available.

    These carry varying recommendations for use on different form

    materials, which have smooth, textured or profiled surface finishes.

    The engineer will decide the surface treatment to be used from the

    previous experience of similar work. Where high quality of concrete

    surface is required the supplier may be contacted for specialist advice

    prior to construction commencing, sample panels may be cast on the

    job to test performance.

    TYPES OF RELEASE AGENT

    The three main types of release agents are

    Neat oils with surfactant

    These are dark in color and consist of mineral oils of low viscosity with

    small quantity of surfactant added. The surfactant increases the wetting

    capabilities of the oil when applied to the form surfaces. Soap is a common

    form of surfactant and its use as an additive in release agents help reduce the

    formation of blow holes on the surface on the concrete. Neat oils with

    surfactant are a general purpose release agent which are found particularly

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    useful for steel forms but may be used for all types of formwork surface

    except plastics such as GRP or polypropylene.

    Mould Cream Emulsions

    These are milky white in color and consist of water and emulsifying

    agents. Mould cream emulsion is an effective release agent and helps to

    minimize blow holes. However it is only suitable for use on absorbent timber

    or plywood forms. These generally need several coats of release agents to

    seal the surface before they can be used for the first time. Emulsion type

    release agents will freeze in winter conditions and also have a tendency to be

    washed from form surface by heavy rain.

    Chemical release agent

    These are usually a light yellow brown in color and consist of very low

    viscosity oil containing a small amount of chemical additive. After

    application the oil evaporates leaving a chemical deposit on the surface of

    forms. This reacts with the concrete on formwork to provide excellent

    release qualities. Chemical release agents are recommended for all high

    quality work and can be used on any type of formwork surface. They are

    resistant to removal by rain and can be left for long periods before placing

    the concrete yet still provide satisfactory release.

    Application

    Release agent should be applied with particular care and only coated

    on the surfaces in a thin uniform film.

    None must be allowed to come in contact with any reinforcement or

    construction joints.

    Careless excessive application is not only costly and wasteful; it will

    stain and seriously affect the durability of concrete surface.

    If too much is applied by mistake, the excess should be wiped off.

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    Formwork Sealers

    These are paints, varnishes, lacquers or other special impermeable

    coatings, which are applied on form surface to improve their qualities.

    Sealers are normally referred to as barrier paints. They cover the form

    face and edges with hard protective coating producing a surface

    resistant to abrasion and effectively sealed against moisture

    penetration. This treatment greatly increases the life of forms.

    Sealers are mostly used on timber or plywood forms to help produces

    quality concrete surface which are uniform in both color and surface

    appearance.

    They must be applied only when the form surface is new, dry and has

    not been previously treated with release agent. The most common type

    of sealer is polyurethane resin; this is air drying with a clear to pale

    yellow finish.

    A minimum of two coatings must be necessary but the manufactures

    instruction must always be carefully followed. When the surface

    becomes damaged or scoured from concrete abrasion the forms must

    be recoated. The forms must be prepared by removing all traces of

    release agent with detergent and the surface roughened with glass

    paper before resealing.

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    FORM WORK DOS AND DONTS

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    MATERIAL PRODUCTIVITY

    COLUMN FORM WORK WITH CRANE

    S.No Items Quantity Required

    per Sq.m for Making

    Material

    Productivity1 L & T steel in kg

    134 KG22.33 Kg month /sq.m

    2 H beams in Rmt5.6 Rmt

    0.93 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm

    1.1 sq.m 0.042

    4 Timber in cft 0.20 cft 0.007 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 6 for L & T steel and H beams

    N = 25 for plywood, timber and structural steel.

    COLUMN FORM WORK WITHOUT CRANE

    S.No Items Quantity Requiredper Sq. m For Making

    MaterialProductivity

    1 L & T steel in kg110 KG

    18.33 Kg month /sq.m

    2 H beams in Rmt5.6 Rmt

    0.93 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm

    1.1 sq.m 0.042

    4 Timber in cft 0.20 cft 0.007 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 6 for L & T steel and H beams

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    N = 25 for plywood, timber and structural steel.

    WALL FORM WORK WITH CRANE

    S.No Items Quantity Required

    per SQ M For Making

    Material

    Productivity1 L & T steel in kg48.1KG

    9.62 Kg month /sq.m

    2 H beams in Rmt3.5 Rmt

    0.70 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm

    1.1 sq.m 0.044

    4 Timber in cft 0.18 cft 0.007 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 5 for L & T steel and H beams

    N = 25 for plywood, timber and structural steel.

    WALL FORM WORK WITHOUT CRANE

    S.No Items Quantity Requiredper SQ M For Making

    MaterialProductivity

    1 L & T steel in kg68 KG

    13.80 Kg month /sq.m

    2 H beams in Rmt3.8 Rmt

    0.76 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm

    1.1 sq.m 0.044

    4 Timber in cft0.18 cft 0.007 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 5 for L & T steel and H beams

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    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 2 for L & T steel, H beams and 3 for Beam

    forming supports

    N = 10 for plywood, timber.

    HEAVY DUTY TOWER SYSTEM USING PLYWOOD ASSHEATHING.

    (For 6 m Floor height or 5 m staging height below beams)

    (With beam form work by conventional)

    S.No Items Quantity Requiredper Sq m For Making

    MaterialProductivity

    1 L & T steel in kg46.6 KG

    46.6 Kg month /sq.m

    2 H beams in Rmt2.0 Rmt

    2.0 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm

    1.1 sq.m 0.11 sq.m / sq.m

    4 Timber in cft 1.1 cft 0.11 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 1 for L & T steel and H beams

    N = 10 for plywood, timber.

    For every 1 m increase in height of the tower add 7.5 Kg.

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    HEAVY DUTY TOWER SYSTEM USING PLYWOOD ASSHEATHING.

    (For 6 m Floor height or 5 m staging height below beams)

    (With beam form work by Beam forming support system)

    S.No Items Quantity Requiredper Sq m For Making

    MaterialProductivity

    1 L & T steel in kg46.6 KG

    46.6 Kg month /sq.m

    2 Beam formingsupport

    12 Kg4 Kg month /sq.m

    3 H beams in Rmt2.4 Rmt

    2.4 Rmt month /sq.m

    4 H Beams in Rmt1.84 Rmt

    1.84 Rmt month /sq.m

    5 Plywood in sq.m1. 12 mm2. 19 mm

    0.97 sq.m0.12 sq.m

    0.061 sq.m /sq.m.008 sq.m / sq.m

    6 Timber in cft 0.06 cft 0.004 cft / sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 1 for L & T steel and H beams

    N = 15 for plywood, timber.

    For every 1 m increase in height of the tower add 7.5 Kg.

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    FLEX TABLE FORM WORK SYSTEM FOR SLAB USING

    PLYWOOD AS SHEATHING

    S.No Items Quantity Requiredper Sq m For Making

    MaterialProductivity

    1 L & T steel in kg51 Kg

    25.5 Kg month /sq.m

    2 H beams in Rmt(secondarymembers only)

    2.85 Rmt1.43 Rmt month /sq.m

    3 Plywood in sq.m1. 12 mm2. 19 mm 0.97 sq.m

    0.12 sq.m

    0.061 sq.m /sq.m0.008 sq.m /sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 2 for L & T steel and H beams

    N = 10 for plywood.

    FOUNDATION FORM WORK USING FLOOR FORMS

    S.No Items Quantity Requiredper sq m For Making

    MaterialProductivity

    1 L & T steel inkg1. 0.800 mwaler2. 1.200 m

    waler

    130 Kg136 Kg

    16.25 Kg month /sq.m17.00 Kg month /sq.m

    Material productivity = Quantity required per sq.m for making

    No. of cycles per month (n) or total number of uses

    of the material (N) n = 6 for L & T steel.

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    4. Clear instructions, Dos and Donts, are available for Engineers,

    Supervisors and Workers to understand the system well.

    5. Part of workmen is trained at L&T-ECCD (CSTI) Training

    Center.

    6. Minimized deviations and mistakes due to established

    procedures.

    ERRECTION OF FORM WORK SCAFFOLD

    1. Erection of two stages of scaffold is completed as shown in thepicture.

    2. The Derrick is fixed to the scaffold as shown in above sketch.

    3. Using the derrick, the items required for scaffold and work

    platform are lifted for further erection.

    200 mm

    1500 mmWork-

    Derrick

    Trestle Scaffold Erection Procedure

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    1. Ladder shall be of sound in construction having rungs equally

    placed. Makeshift ladder shall not be used.

    2. Ladder shall be secured to the scaffold as shown.

    3. Ladder shall be extended at least 1m above the work-platform.

    4. Horizontal distance between the base of the ladder and the

    work-platform shall be of the height of the work-platform.

    Dismantling of Scaffold

    1. Scaffold dismantling area shall be cordoned and only skilled

    workmen shall be used for this work.2. The scaffold being dismantled shall be provided with Red Tag

    to indicate it is unsafe to work on it.

    3. Dismantled materials shall be lowered using Derrick and Pulley

    arrangement.

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    4. Each tier shall be completely dismantled and the material

    lowered to the ground before beginning to dismantle the next

    tier.

    5. Dropping materials shall be avoided to prevent damage to

    materials and injury to the workmen below.

    6. While removing jammed or rusted scaffold components

    workmen can lose their balance and fall. Hence, anchoring

    safety belt to a scaffold frame or lifeline before attempting to

    loosen stuck or jammed parts is essential.

    7. At the end of the day, if a scaffold is going to left half-

    dismantled, it is essential to lower all the loose scaffoldmaterials down and ensure that the scaffold is braced

    adequately to the building.

    8. All the dismantled materials shall be stacked in the appropriate

    manner at the designated place.

    SCAFFOLD INSPECTION AND TAGGING PROCEDURE

    Erection / Dismantling of Scaffold

    1. Erection of any scaffold shall be done only by the nominated

    scaffolding gang under the supervision and guidance of

    formwork engineer.

    2. "Red coloured Tag" is fixed on the scaffold when it is under

    erection / dismantling by the formwork engineer or by the

    nominated foreman.

    3. Once the erection is completed, Formwork Engineer or the

    nominated competent foreman shall inspect the scaffold. After

    inspection if the scaffold is found to be safe for use, the

    formwork engineer / nominated foreman shall fix the Green

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    coloured Tag replacing the red tags. The formwork engineer /

    nominated foreman will fix the Green coloured Tag after signing

    and writing the date.

    Inspection of Scaffolding1. All the scaffolding being used at site shall be re-inspected by

    the form work engineer / nominated foreman once in a week.

    Green Tags of the Scaffolding which are found safe shall be

    renewed with date of inspection and signature of the Form work

    Engineer / nominated foreman.

    2. If any scaffold is found unsafe for use, formwork engineer /

    nominated foreman shall place a red scaffold tag and stop the

    usage of scaffold until rectification.

    Extension and Alterations of Scaffolding

    1. Any extension, alteration or shifting of scaffold (except in the

    case of mobile scaffold) shall be done only by the scaffolding

    gang under the supervision and guidance of the Formwork

    Engineer.2. When such work is being carried out in scaffold, a Red Scaffold

    Tag shall be placed on the scaffold indicating the restriction in

    use of scaffold only by the scaffold gang.

    3. After carrying the works, the formwork engineer shall inspect

    the scaffold and certify it safe for use by placing the green tag if

    found safe. Else the red tag shall remain until rectification is

    done.

    Red Scaffold Tag

    This tag indicates that the scaffold is under erection or

    dismantling or has not been inspected or is not safe for use (by

    anyone other than scaffold gang).

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    Green Scaffold Tag

    This tag indicates that the scaffold is complete & it has been

    inspected by competent person and is safe for use. GREEN scaffold

    tag is valid for one week from the date of last inspection.

    "SCAFFOLD RED TAG" "SCAFFOLD GREEN

    TAG"

    PERSONAL FALL PROTECTION SYSTEM

    Safety Belt / Full Body Harness

    1. While working near edges or openings, safety belt should be

    used to limit the worker's movement so that he is unable to reach a

    location where there is a risk of falling.

    Date of

    Inspection:Si natureo f Com eten t

    Date of

    Inspection:Si natureo f Com eten t

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    2. Safety belt should be used to protect a worker in case of a fall

    while working in an elevation. It should be used along with lifeline, fall

    arrestors wherever applicable.

    Safety Belt/Full body harness:

    They shall confirm to National or International Standards. The

    length of the lanyard used shall be not more than 2 m.

    Anchorage Point

    The lanyard of the safety belt or lifeline should be anchored to a

    structure capable of withstanding at least 2.5 tons.

    Lifeline

    20 mm diameter polypropylene rope shall be used a lifeline and

    properly anchored to an anchorage point as mentioned above.

    Energy absorber

    It is an optional attachment used in conjunction with the lanyard

    to connect the harness to the anchorage point. In case of fall it

    reduces the impact energy passed on to the worker considerably by

    absorbing part of the energy.

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    Precaution

    All fall protection equipment including Safety belts, Full Body

    Harness, Energy Absorbers, and Lifeline & Fall Arrestors shall be

    removed from service if they are subjected to impact load once.

    Safety Belt / Full Body Harness with Double Lanyard

    Double Lanyard safety belt shall be used by workmen to protect

    from fall during vertical or horizontal movements. Usage of this belt

    ensures that at any point of time one of the lanyards of the belt is

    anchored.

    Fall Arrestors

    Rope Grab Fall ArrestorRope grab type fall arrestors shall be used to protect fall of

    workers during vertical movement such as ascending or descending

    Scaffold towers, vertical ladders etc.

    Retractable Type Fall Arrestor

    This type of fall arrestors shall be used in places where high risk

    of fall of workmen persists. This fall arrestor can be directly anchored

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    to the anchorage or can be used in conjunction with a lifeline as

    shown below.

    SAFETY GUIDELINES FOR VARIOUS TYPES OF FORMWORK

    FOUNDATION FORMWORK

    1. Care shall be taken while lowering the components into the

    excavated pit to avoid damage the components and injury to

    workmen.

    2. Formwork components shall be stacked at a Safe distance (at

    least equivalent to the depth of Excavation) from the excavation to

    prevent falling of the components and sand slide into the excavated

    pit. Also over stacking of the components should be avoided.

    FOUNDATION

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    WALL / COLUMN FORM WORK

    1. Proper Slinging and Rigging Practices should be followed

    while lifting the formwork assembly.

    2. Strength and Location of lifting hooks on the formwork should

    be checked.

    3. No loose materials should be kept on the formwork panels or

    platforms.

    4. Panels should be pre-checked before lifting.5. Tightening of tie rods.

    COLUMNWALL FORMWORK

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    FLEX SYSTEM FORMWORK

    1. All the main props should be fitted with folding tripod

    2. All the intermediate should be fitted with supporting head

    3. Do not use reinforcement steel in place of locking pin.

    4. In ground level work, proper earth compaction and necessary

    bearing below the prop should be given.

    5. Props should not be inclined. Verticality should be maintained.

    HEAVY DUTY TOWER SYSTEM

    FLEX SYSTEM

    HEAVY DUTY TOWER

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    1. Every 6m interval bracing should be fixed with permanent

    structure or from one tower to the other.

    2. Ground level earth should be compacted well for better loading.

    3. Conditions of the components should be checked and the

    damaged ones should not used.

    4. Tor steel rod should not be used in place of lock pin.

    STAIR TOWER

    1. Ground level earth should be compacted well for safe loading.

    2. Every 6m-interval bracing should be fixed with permanent

    structure.

    3. Old / damaged components should not be used.

    4. Coir rope / binding wire should not used in place of M10 bolt

    and Nut for fixing the gridiron with stair bracket.

    STAIR TOWER

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    5. Bracings and lock pins should not be omitted under any

    circumstance.

    ACCESS SCAFFOLD

    1. Ground level earth should be compacted well for safe loading.

    2. The system should be braced at every 4.5m height level with

    the permanent structure.

    3. Old / damaged components should not be used.

    4. Coir rope / binding wire should not used in place of Platform

    hanger

    5. Bracings should not be omitted under any circumstance.

    LIFT SHAFT FORMWORK

    1. Proper Slinging and Rigging Practices should be followed while

    lifting the formwork assembly.

    2. Strength and Location of lifting hooks on the formwork should

    be checked.

    ACCESS SCAFFOLD

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    FRAMED FORMWORK

    3. No loose materials should be kept on the formwork panels or

    platforms.

    4. Panels should be pre-checked before lifting

    5. Adequate space (gap) should be ensured before lifting the inner

    panel platform

    FRAMED FORMWORK - FRAMI

    1. Tie rod should be provided only where provision is given.

    2. No component should be omitted.

    3. Frami adjustable strut 260 should be anchored properly.

    4. This system should not be used for the works done at height

    more than 4.2m.

    CLIMBING FORMWORK

    1. Platform timbers should be free from cracks, fungus, attack and

    dead knots.

    2. Handrails should be fixed.

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    3. Stop anchor threaded length should be 35mm + or 5mm.

    4. Platform should be free from gap between timber joints.

    5. Check for proper engagement of climbing cone.

    SLIPFORM

    1. Earthing of the system and ELCBs for power supply

    2. Lightning arrester

    3. Aviation Light

    4. Communication arrangement

    5. Safety in RG Hoist and Winches

    (a) Operator competency

    (b) Limit Switches

    (c) Signal & Alarm system

    (d) Maintenance of wire ropes

    (e) Fleet angle between 0.50 to 1.50 for plain drum; for

    grooved drum not more than 20

    (f) Condition of Brake

    CLIMBING FORM WORK

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    (g) Barrication of the wire rope way and cross over if

    required

    (h) Roller for the wire rope between first diversion pulley and

    the winch

    6. Bracing of access tower at every 6m height

    7. Handrail and toe board in the platform

    8. Safety nets to trap the falling materials

    9. Wind protection cloth

    10. Protective shed

    11. Adequate illumination

    12. Proper tightening of hardware13. Fire Extinguishers

    14. Workmen entry register

    MIVAN FORMWORK

    MIVAN FORM WORK

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    FORM WORK PLANNING

    PLANNING PROCESS

    The planning process is divided into three stages.

    First stage

    The necessary information and limiting conditions must be

    collected and defined. When projects of similar nature are executed,

    a checklist can be of immense help in obtaining information required

    to prepare a complete scheme. Important information for planning

    includes the time and materials available for the construction project,

    the construction plans (geometry of the structure), and any otherspecial criteria as mentioned by the client. Limiting conditions may be,

    for example, whether a crane can be used, or whether formwork

    materials can be stored on the site.

    Second stage

    The formwork system to be used can be selected. In addition to

    cost of the materials, the choice of the system will be influenced by

    the experience of the planner and of the team, which has to set up

    the formwork on the site, and by the project archive. A database /

    project archive that captures the experience gathered over the years

    can aid in cost effective system selection. Also, the interaction

    between the planner and the formwork crew is vital in the successful

    implementation of any scheme prepared. Once the decision has been

    made, stage 3 of the planning process comes into force.

    Third stage

    This involves all engineering design tasks. This part of the

    process is most time consuming. It is important to be able to allow for

    changes arising at later phases of the project. A large number of

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    construction projects involve standard shapes and geometries for

    which ready-to-use formwork can be used in its as-delivered state.

    Planning is limited to showing arrangement of elements from the

    chosen system. The emphasis should be on maximum reuse of

    materials available and procuring minimum materials Just-In-Time.

    Available

    time

    Availabl

    e

    Constructi

    on lans

    Customer

    re uireme

    Limiting

    conditio

    Evaluation of information

    Choice of system

    Customer Customer

    CustomerProjectarchive

    Execution

    Structur Formwor Formwork

    with

    Additional aids

    Statics

    Workpreparationsheet

    Project archive STAGE 3

    STAGE 2

    Planning process

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    BENEFITS OF PLANNING

    An increase in efficiency due to improved formwork planning

    can be an important way of raising the level of competitiveness.

    Important rules in formwork planning are:

    Rule 1: When placing the formwork, dont forget to think of how

    it is going to be removed.

    Rule 2: A tidy site is also a safer site.

    Rule 3: Sketches and clear layout plans can save work for

    operatives on site.

    Rule 4: Storage space costs money, in much the same way as

    formwork materials lying around unused.

    Planning is only one of the aspects of Formwork Management.

    Planning becomes incomplete in relation to the total job when there is

    no efficient system to implement the planned activities. Formwork

    Management should address the following issues as well:

    Mobilization of materials

    The requirement of Formwork materials should be indicated by

    the site to their Regional Office. The Regional Office will take into

    account the requirements or releases from other job sites in their

    region and if materials are required to be added from outside the

    region the same will be intimated to Head Quarters Formwork

    department.

    Implementation guidance

    During the execution of formwork, engineers should take

    interest and give guidance in planning the arrangement and

    correcting the abuses / misuses of materials. They should also ensure

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    that the materials are utilized to the full extent. Attention has to be

    paid to prompt deshuttering of materials by keeping track the

    concreting dates and curing time. This contributes towards the

    increasing of the material productivity. Care should be taken to see

    that the material procurement does not exceed the initial planned

    quantities.

    Demobilization

    Just as the requirement schedule was made in the beginning of

    the project, the release schedule should be made towards the closing

    stages of the job. For any large mobilization, the program should be

    made three months in advance and informed to Regional Office and

    Head quarters. Demobilization affects the planning of materials for

    new projects, sometimes, unnecessarily leading to addition of new

    materials.

    Upkeep, maintenance

    Repairs and maintenance of Formwork items is to be done by

    the dispatching site. Unfortunately there are many occasions where

    neither the dispatching site nor the receiving site takes up this work

    resulting in unusable material lying stacked at sites.

    Accountabil it y of materials

    Apart from losing materials due to abuse and rough handling,

    accessories / small items are also lost due to bad housing and lack of

    upkeep and maintenance. Every site towards the closing stages

    should reconcile the materials receipt with dispatches and stock to

    access the reduction in physical stock if any.

    Training

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    It is important to disseminate information / knowledge to all staff

    and labour on the job. The training of the staff and workmen can be

    organized at the site level itself. For any additional help the site can

    approach the Regional Office and Headquarters.

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    FORM WORK COSTING

    ESTIMATING COST OF FORM WORK

    The cost of formwork consists of the cost of

    Materials

    Labour for making Formwork

    Labour for erection and dismantling

    Repair of formwork

    Labour for transporting, shifting materials

    Plant and equipment used for making, erection,dismantling, repair and transport

    Cleaning and storage costs

    Transportation costs

    MATERIALS

    Usually this is a major component of the total cost of formwork.

    Material can be classified as

    Direct materials

    They are the main component of form work eg. Timber,

    steel etc.

    Consumables

    Nails, shuttering oils etc. are treated as consumables.

    The cost can be computed as

    Total Rmt months used x Depreciation / Rmt/ month

    Shuttering Area

    Cost per sq.m oftimber beams

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    Total Ton months used x Hire charges / Ton/ month

    Shuttering Area

    Usually the first method is used for materials with short life like

    timber and plywood and second method is used for materials with

    long life like steel and metal components.

    COST REDUCTION

    The key areas of the cost reduction are

    Right system for the right job

    Considerable savings result when the appropriate system is

    used for the job in hand. Several times the system best suited for the

    job is not selected and hence the project may not be completed

    profitably.

    Planning for maximum reuse

    Specification or local code requirements for stripping and

    reshoring are an important factor in planning form reuse. Maximum

    investment in forms is achieved by constructing the least number of

    forms required for a smooth workflow and then reusing these forms

    as often as necessary until the job is completed.

    Economical form construction

    When non - reusable forms are to be built in position on the job,

    the planning should be such that inexpensive materials are used

    which are easy to transport, handle and shape in the field.

    Reusable forms must be more durable, made of strong

    materials that can withstand continuing and usually must have added

    features that make them easy to handle and to assemble.

    Cost per sq.m ofsteel =

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    In choosing ties or inserts, the initial cost is not as important as

    the labour involved in their installation and form striping.

    Efficient setting and stripping practice

    The full benefit of a plan for reuse of forms can only be realized

    if the forms can be stripped and re-erected without too much lost time

    and if the form is not wrecked in the process. Therefore, designing for

    easy handling and disassembly is essential.

    OTHER COSTS AFFECTED BY FORMWORK PLAN

    Crew efficiency

    Advance planning eliminates confusion and delay in the field,

    where it is most costly. Where maximum reuse of forms if

    emphasized every operation must be scheduled precisely to sustain

    effective continuity of employment of craftsmen on site.

    Concreting

    The ease and speed of placing concrete is related to the

    planned sequence and to some extent to the choice of form design.

    Bar setting

    If form design can enable the reinforcement to be pre-

    assembled before installing, it may enable the reinforcing crew to

    work under more favorable conditions.

    Cranes and hoists

    One object of planning should be to use cranes and hoists

    efficiently so that there are just enough on a project to keep the work

    going smoothly.

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    FCCE

    FCCE is responsible for the following activities of L&T-ECC division's

    projects:

    1. Planning for FW material requirement for the projects

    2. FW material mobilization within the region to project sites and

    region to region

    3. Monitoring and controlling the FW cost for each project

    4. Execution of FW activities at project sites as per the Scheme

    drawings and Work Instructions

    5. Maintenance and re-conditioning of FW material stock available at

    regional depots and sites

    6. Execution of slipform, pre-stressing and grouting activities at sites

    including material procurement.

    QUALITYASSURANCE PROCEDURES

    The Quality System is documented in a three tiered structure as

    follows:

    1. Quality Manual

    Quality manual specifies the management responsibilities and

    authority within the quality management system and identifies the

    company requirements in addressing the various elements of ISO

    9002:1994

    2. Quality System Procedure

    Quality system procedures are used to control the functioning

    and organization set-up in each department. They define the

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    responsibilities and authorities within the department and cover

    functioning arrangements.

    3. Work instructions, Quality control procedures, Quality assurance

    plans, Drawings and Specifications

    These documents are used to control activities at work

    locations. The preparation, approval and issue of these documents

    shall be the responsibility of the concerned department head.

    Internal quality audits are conducted to verify whether quality

    related activities and related results comply with planned

    arrangements and to determine the effectiveness of the Quality

    System.

    VALUE DRIVERS

    In order to meet the corporate management requirements and

    as well as for improvements in business, some areas of improvement

    have been identified. The specified improvements are named as

    "VALUE DRIVERS". A committee identifies these value drivers with

    the targets for the department. The value drivers are targets to be

    achieved by each individual in the department as assigned by the

    department head. The results shall be periodically reviewed by the

    Head of the department.

    ROLES AND RESPONSIBILITIES

    1. Preparation of Formwork programme based on the overallconstruction programme

    2. Finalization and coordination of shuttering scheme

    3. Ensuring effective and proper utilization of shuttering and staging

    materials

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    4. Planning and allocation of materials / labour / plant and machinery

    for formwork activities in coordination with concerned persons at

    site

    5. Educating sub-contractors on System Formwork

    6. Making mock-up of various System Formwork

    7. Periodical reconciliation of Formwork materials

    8. Preparing S6 A schedule (Requirement / Release) and sending

    the same to Regional office

    9. Preparing stock statement of formwork materials both in units and

    in numbers, with area of shuttering done category wise, plywood /

    timber procured during the quarter / till date and productivity report10. Maintain close interaction with stores and site people for proper

    accounting of materials

    11. Despatch and receipt notes to be sent to Regional Office

    12. Making of purchase requisition for plywood and timber after

    thoroughly analyzing the number of repetitions

    13. Receipts of plywood / formwork materials to be acknowledged

    after quality checks to Regional Office on monthly basis

    14. Arranging for painting of bracing's ends as per prescribed colour

    code

    15. 100 % materials reconciliation at the end of the job

    16. Looking after pre-despatch maintenance

    17. Ensuring that despatched materials are in usable condition.