L&T FORMWORK SYSTEM

L&T FOUNDATION FORMWORK(For heights up to 1.5m)

SYSTEM DESCRIPTION:

The side forms shall be made of steel and shall be rigid enough to take theLoad and pressure exerted by concrete. When checked with a straight edge they shall not deflect by 3 mm and shall not settle down. The side forms shall be fixed rigidly in vertical position within tolerance limits Of 5 mm in line and 3 mm in top level. The form shall be secured in position using wedges, clamps etc. so that they will not deviate from their alignment during concreting. Before erecting the forms, good shuttering oil / grease should be applied properly for easy de-shuttering after it is cast.

The forms shall be removed without injuring the concrete. The forms shall be stripped when the concrete is sufficiently hardened and gained strength as per the codal provisions.

Sectional Elevation Plan

L&T FOUNDATION FORMWORK(For heights above 1.5m)

SYSTEM DESCRIPTION:

When foundations are huge say mass raft foundations and of heights greaterthan 1.5m, then they are executed using L&T Wall Formwork System.

L&T Wall Formwork is a complete Formwork system, which mainly consists of plywood sheathing backed by timber H-Beams and Steel walers (ISMC 100 B/B channels). The support is given by double nut alignment props which can be used to align the shutters to the required angle. These shutters can be erected manually & also can be handled by crane.

Besides giving smooth concrete finish this system comes with inbuilt safety and working accessories.

HY-RIB Stoppers for as construction joints:

Whatever be the type of shutters being used on the external side say L&T Foundation or Wall Formwork, to ease the construction of mass raft foundations where the rebars projecting out are the biggest hindrance, Hy-rib stoppers are generally being used to stop the concrete.

Hy-rib permanent formwork comprises of Zinc-coated steel which are formed into a ribbed expanded mesh.

It is for use as permanent formwork for concrete to form construction joints, stop-ends for retaining walls, columns & beams. It can also be used to support horizontal slab flooring.

It will produce a surface which will bond directly with the next pour or, in case of retaining walls and columns, be suitable for rendering or tiling.

L&T COLUMN FORMWORK

SYSTEM DESCRIPTION:

L&T Column Formwork is a complete Column Formwork system, mainly consists of plywood sheathing backed by timber H-Beams and Steel walers (ISMC 100 B/B channels)which can be erected manually & also can be handled by crane.Besides giving smooth concrete finish this system comes with inbuilt safety and working accessories.

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Sectional Elevation Plan

L&T WALL FORMWORK

SYSTEM DESCRIPTION:

L&T Wall Formwork is a complete Formwork system, which mainly consists of plywood sheathing backed by timber H-Beams and Steel Walers (ISMC 100 B/B channels). The support is given by double nut alignment props which can be used to align the shutters to the required angle and position. These shutters can be erected manually & also can be handled by crane.Besides giving smooth concrete finish this system comes with inbuilt safety and working accessories.

Sectional Elevation Plan

LIFT CORE WALL - CLIMBING FORMWORK

Formwork System for the construction of the LIFT CORE WALL:

Salient features of the Formwork used for the Construction of LIFT CORE WALLS:

Formwork details:1. L&T Wall formwork with Travelling climbing system (CB 150F) used for Outer face of core wall.2. L&T Lift shaft platform system used with wall formwork for Inner face / opening.3. Approx. max. size of wall panel (inner side) is 2.40m x 4.00m.4. Outer shutter panels are supported on a pair of brackets the max. size being 2.40m x 4.00m.5. Each pair of shutter panel with brackets is having in-built safety such as necessary handrails for concreting & shutter platforms.6. Tower cranes are used for lifting of shutters from one pour to another.

SYSTEM DESCRIPTION:

The lift shaft platform system is suitable for lift core / RC-walls close to each other.

The Lift Shaft Formwork System comprises of shaft main beam resting in pockets provided in the already cast RC-Wall. The cross beams are provided over this. Wooden planks over the cross beams form the lift shaft platform. Leveling of the platform is possible by operation of spindle within the gravity pawls.The main beam has gravity pawls which unlocks itself from the pockets when lifted upwards by tower crane and locks itself at the next pocket location. The gravity pawls are hinged and have one way movement only, the platform thus has high levels of safety. The platforms as a whole along with the main beam, gravity pawls, cross beams and platform can be lifted as one unit.This platform facilitates resting of the wall formwork and alignment.

Lift shaft platform resting in the pocketsLifting Bracket.Sling from CraneTo be castPocket to suit PawlFreshly cast Pocket to suit PawlClimbing PawlLift shaft PlatformAlready Cast Wall

LIFT SHAFT PLATFORM SYSTEM

Lift shaft platform being lifted to the next levelSling from CraneTo be castFreshly cast Climbing PawlLift shaft PlatformAlready Cast WallPocket to suit Pawl

LIFT SHAFT PLATFORM SYSTEM

SALIENT FEATURES:

Ideal system for speedy construction. Eliminates the need for scaffolding to support the Wall Formwork. High levels of safety - full proof system. Minimum skill & operation for anchoring & shuttering at each level.

Alufo COLUMN FORMWORK

SYSTEM DESCRIPTION:

L&T Alufo is a complete Column Formwork system, mainly consistsof Lightweight panels which can be quickly erected manually.Besides giving very smooth concrete finish this system comes with highperformance, safety and working accessories.

Sectional Elevation Plan

L&T Alufo Column Formwork system

Forms square-section and rectangular-section columns quickly and easily....

With the wide range of adjustment from 200 to 750 mm in a 50 mm grid.

With fair-faced concrete quality - The sheeting is fixed from behind, so it leaves no indentations in the fair- faced concrete.

By simple process of fixing the panels together.

With a quick-insertion front triangular ledge - no nailing.

Permissible fresh-concrete pressure up to 80 kN/m.

Advantages of Alufo-Column Formwork

Each panel weights about 25Kg, so can be handled Manually.

Since this involves a simple process of fixing the panels together, Alufo System results in enhancement of labour productivity.

Numbers of components are less, so reconciliation of Material becomes that much easier.

Better concrete finished surface.

THE L&T AUTOMATIC CLIMBER SKE (FOR STOREY-HIGH CLIMBER) The L&T Automatic Climber SKE lifts the large area formwork element together with the climbing scaffold and all working platforms in one step by a whole concrete lift - without a crane. There are two Automatic Climbers SKE in a climbing element, arranged optimally each with one climbing bracket.The outstanding advantages of the L&T Automatic Climber SKE for use on high buildings are:Optimum adaptability to every The L&T Automatic Climber SKE is a Plan shape single lifting device and can therefore be arranged independently of the plan shape.The width of the elements can thus always be arranged favorably. This means that the most economical solution for all plan shapes of buildings, piers or shafts is achieved.Storey - high climbing in one stepThe L&T Automatic Climber SKE climbs storey by storey, even concrete lifts of up to 3.5 m in height need no intermediate steps or intermediate anchoring. This provides enormous savings in anchoring, working time and thus money.High bearing capacityBecause of its robust and strong construction the L&T Automatic Climber SKE offers the possibility of climbing large area formwork elements of up to 24 m2 in one lift. Automatic hydraulic driveThe L&T Automatic Climber SKE is driven by light hydraulic cylinders which are moved extremely easily and quickly from element to element. The hydraulic devices are fitted with all necessary control equipments for the simultaneous running operation of two or more lifting cylinders. A suitable remote-controlled electric system provides easy climbing.

SafetyA high degree of safety is based in the L&T Automatic Climber SKE and its hydraulic drive. The lifting mechanism is always coupled with the climbing section and therefore safe. The hydraulic cylinders for the drive of the L&T Automatic Climber SKE are equipped with a pipe breakage safety device.Economy with system The standard parts of the proven L&T climbing formwork provide, together with the Automatic Climber SKE, a simply operated and therefore extremely economical self-climbing formwork.

ADVANTAGES 1. Its modular system: optimum adaptability to any project small number of different parts inclination adjustments of up to +/- 15o possible for formwork and scaffold uniform design of suspended platform and pouring platform platforms are pre-assembled, i.e rapid on-site erection direct connection facility to L&T Automatic Climber SKE 1st pouring section can be formed using system components.

2. Its ease of operation: formwork can be erected and struck without a crane and with minimal manpower. entire unit is lifted in one piece, quickly and easily (i.e minimal crane time) swift, precise formwork adjustment in all directions. simple inclination adjustment.

3. Its practice-oriented design:

high load ability (50 kN per climbing bracket) formwork heights of up to 3.6 m suitable for beamed and framed formwork panels and formwork made of timber beams. wide working platforms (2.40 m) formwork retractable by up to 60 cm economical anchoring (small number of separate parts) can climb over concrete projections with cantilever of up to 25 cm complete safety in all phases of the work climbing brackets can be used as heavy scaffold platforms.

Formwork for Slab

Flex System: The forms shall be made with plywood backed by timber beams & supported using props. The props are the members which take the load and shall be erected in position using tripods for stability. The spacing between the timber beams shall be in accordance with design criteria & should be properly nailed to the plywood and properly placed over the props to avoid toppling.The props are designed to take care of the vertical loads which are tested under max. loading conditions. The spacing will be decided based on the thickness of the slab i.e. load coming from the slab & the prop height required. The more the height, the lesser the capacity so it should be ensured that usage of props in the fully extended conditions are avoided.Heavy Duty Tower System (HDT): The forms shall be made with plywood backed by timber beams & steel elements. These elements are supported on HDT which are designed to take care of the vertical loads. Each tower leg has a load carrying capacity of 62.5 KN and shall be designed for the same based on the slab/beam depths. Proper application of shuttering oil/grease should be ensured for easy de-shuttering..

Flex System with Finished View

HDTSYSTEM

WORKING SEQUENCE OF MF FOR WALL

STEP BY STEP PROCEDURE 1. Remove the all tie rods & cone screws after the allowed setting time for de-shuttering is reached.

2. De-shutter and Roll back the shutter after removing the running gear wedges, with the use of 2 way ratchet.

3. Fix the suspension shoe in the new position with the cone screw.

4. Change the position of lever in the lifting mechanism to the top portion for lifting the climbing profile.

5. Lift the climbing profile for one stroke then remove climbing profile wedge and then lift the climbing profile to the next lift level. Stop lifting 100mm below the suspension shoe level. Lift the climbing profile one at a time by closing the shut-off valve of other cylinders. Ensure proper entry of profile into the shoe and lift until the slot hole for the wedge is clear off from the shoe.

6. Insert the climbing profile wedge into its slot and lower the profile by releasing the cylinder. Ensure that the wedge rests on the suspension shoe top.

7. Change the position of the lever in the lifting mechanism to bottom position for platform lifting.

8. Unscrew the supporting carriage . ensure a gap of minimum 40 mm

9. Remove the safety bolt (Safety pin)

10. Lift the platform MF bracket for one stroke then remove the suspension pin & continue the lifting upto next level until the climbing carriage touches the climbing profile wedge.

11. Insert the suspension pin inside the suspension shoe slot & place the climbing carriage in the suspension pin by releasing the cylinder.

12. Insert the safety bolt in the suspension shoe.

13. Screw in the supporting carriage against the wall.

14. Remove the lower most suspension shoe standing from suspended platform and take it to the working platform for next level.

15. Move the shutter towards the wall after necessary cleaning and application of release agents.

16. Fix the tie rods , universal climbing cone & Positioning disc at top

17. Follow the sequence from 1 for subsequent lifting of climbing profile & MF bracket.

Sequence of erection:a) Pair of horizontal profile with platform member to be assembled.b) Vertical profile with pressure strut short & long to be assembled with the horizontal profiles without pin on one side..c) At the time of erection lift the assembled one with crane put the strut pin & fix it on the suspension shoe .d) Insert the climbing profile.e) Assemble the vertical waling , plumbing spindle, running gear (preassembled) with shutter and lift and position it on the bracket.

Safety measures to be taken in operation.

1) Remove suspension pin from suspension shoe before lifting the platform to next level, immediately after the first stroke,2) Remove climbing profile wedge before lifting the climbing profile to next level, immediately after the first stroke,3) While lifting the climbing profile to next level , insert the wedge in to the climbing profile, before changing the direction of lifting mechanism, and see to that it is fully4rested On the suspension shoe.4) Grade & Brand of hydraulic oil should not be mixed.5) Unscrew the supporting carriage before lifting the platform to next level.6) Safety pin to be removed first before lifting the bracket assembly & should be fixed in the last after the bracket is fixed into the next level on the suspension pin.

UNIFO COLUMN FORMWORK

SYSTEM DESCRIPTION:

L&T Unifo is a complete Column Formwork system withPlywood as a sheathing member and Steel as its backingmember.This column formwork produces finished surfaces to meetextra-high requirements (fair-faced concrete).Precision-manufacturing ensures that the column crosssectionis perfectly square or rectangular, even at the shell joins.

Advantages of Unifo-Column Formwork No making is required at site. Each panel weighs about 35 kg, which can be handled Manually. Enhanced labour productivity. Much easier to reconcile, because of lesser components.

can withstand pressure up to 80kN/m2.