Layher Scaffoldings' Allround TG 60 Shoring System

    Layher Allround’s shoring frames TG 60 have been developed as an extension of the Allround Scaffolding Systems which is a simple, unique and bolt-free connection technology

    Mithilesh Kumar Layher
    Mithilesh Kumar, Director, Layher Scaffolding Systems Pvt Ltd
    Layher Group produces high-quality scaffolding systems in Germany which are being used by industries like construction, chemical plants, power plants, at shipyards and offshore. The company has worldwide presence with over 30 sales subsidiaries.

    More Possibilities - Layher Products and Services
    Layher's product characteristics and services help customers to achieve long-term success and increase the profitability of their companies. The Layher Allround Scaffolding has been established as a synonym for modular scaffolds on the market and offers unsurpassed versatility to be used in varied application areas.

    Layher Allround Shoring
    Layher Allround shoring TG 60, (The False work frame – even more possibilities in Allround Scaffolding) - Allround scaffolding uses a simple, unique and bolt free connection technology. Sliding the wedge head over the rosette and inserting the wedge into the opening immediately secures the component. There is still sufficient play to secure the other end of the ledger. A hammer blow to the wedge transforms the loose connection into a superbly strong structurally rigid one. The face of the wedge head is now precisely positioned against the standard.

    The new Layher Allround false-work frames have been developed as an extension of the Allround Scaffolding Systems. With three new additional parts, we can assemble false-work towers even faster higher and sturdier. The shoring frames TG 60 are available in three sizes: 1.00 x 1.09 m, 0.50 x 1.09 m and 0.71 x 1.09 m. The base frame H = 0.71 m is equipped with Allround rosettes at the top and the bottom and has no spigot.

    The false work frames are made of steel tube of high strength and are stiffened with 2 small diagonal braces. Every vertical standard can be loaded with up to approx. 6 tons. The ends of the welded ledgers and diagonal brace are fattened. This makes the Allround rosette fully useable.

    To transfer pulling force, every frame is secured by locking pins or bolts to each other. In this way the tower can be assembled on the ground and placed by crane.

    Layher Allround Shoring TG 60
    For the construction of a continuous casting system, the new Allround Shoring TG 60 from Layher permitted work at 40 metres up, for concreting a 25 metre long binding beam – with a dead weight of 21 tonnes per metre.
    The product innovation is assembled out of the newly developed Allround Shoring Frame TG 60 as well as Allround standard parts like ledgers and diagonal braces. In this way the advantages are intelligently combined: Quick assembly and dismantling thanks to reduced number of components, light component weight, and screwless wedge lock connection technique and optimum material utilisation as a result of variable bay lengths. These can be adapted flexibly to the existing loads and the grid dimension of the formwork beams. Scaffolding companies increase assembly speed with it due to their day to day experience and moreover offer an attractive full package: They implement requests of the building contractors no-site without any difficulty with the Allround construction kit – whether they are exact adaptations to difficult building geometries, extensions like production stages and stair towers or supplementary solutions, for example concreting platforms and bracing scaffolding.

    Application of Allround Shoring TG 60
    For the greatest possible efficiency in the construction of the 46 metres long and 28 metres wide shoring tower structure, the scaffolding company considered all three construction phases already during the planning: setting up the moulds for the down stand beams, laying and concreting of the semi-finished ceilings as well as creation of the upper floors. In accordance with specifications the scaffolders utilised the material-saving 1.09 metres wide and 1.57 metres long tower versions, which sped up the procedure and simplified logistics. In longitudinal direction they connected the shoring towers at the head of the tower with two 1.09 metres scaffold bays each and one built-in Allround ledger. With the aid of the system components, elaborate calibration was obsolete: After erecting the shoring tower for the first beam axis, the further assembly resulted from the dimensions of the system components and the automatic rectangularity.

    On the one hand the scaffolders adapted the 6.5 metres high shoring tower structure exactly to the grid of the down-stand beams and at the same time created ideal prerequisites for the second and third construction phase. The reconstruction work was therefore reduced to the minimum: As a support for the concreting of the semi-finished ceilings, the shoring tower structure was simply raised to the bottom edge of the semi-finished ceiling by inserting a 2.5 metres high Allround standard onto the Allround standard already integrated in the connecting bays. The loads were absorbed by the intermediate bay and transferred directly into the adjoining shoring towers by means of diagonal braces, which made the assembly of additional shoring towers underneath the ceiling obsolete. When building the upper floor, load concentrations were absorbed by square shoring towers the scaffolders had erected here and there in the intermediate bays. Around 100 tons of scaffolding material were used altogether – exclusively Allround standard parts with well-thought-out screw-less wedge lock connection.

    Allround Shoring TG 60
    Allround TG 60 for support of heavy structure
    To assemble the 600 square metre structure, scaffolding company, this helped to speed up assembly to its experience. In view of the heavy loads, the scaffolding experts chose square shoring towers with a ground plan of 1.09 x 1.09 metres, linked to Allround ledgers and diagonal braces by wedge head connectors and braced – meaning without additional connections using tubes and couplers. The combining of frames, in order to increase load-bearing capacity in the area of the almost seven metre high wall slabs too, was achieved using Allround ledgers with short intermediate bays. During measuring of the shoring towers, the use of standard Allround Scaffolding components likewise permits a considerable time saving. After assembly of a single tower, the distance to the next tower results automatically with the system dimension from right-angled positioning of Allround ledgers on the ground.

    The scaffolding solution was also persuasive when it came to flexibility: the Allround Shoring TG 60 was able, thanks to its two shoring frames of differing height and by the spindle extension length, to compensate for height differences in the angled ceiling and in the slightly sloping ground. The width of the shoring was precisely adapted to the tapering form of the wall of the inlet and outlet structure by intermediate bays of variable width made from Allround equipment, or by extensions in the edge area using Allround standards. It was also possible using simple Allround brackets to build the working levels for the formwork on the wall slab and binding beam, or to construct the site accesses quickly using Allround stairway towers. 150 tons of scaffolding material were used in all, which Layher delivered to the site right on schedule and in a very short time when requested.

    The safe assembly sequence for Allround Shoring TG 60 automatically provides scaffolding erectors with all-round side protection, even without additional components, during upright assembly. This allows the valid safety regulations to be met in full for the first time. The use of the new Allround Shoring TG 60 thus ensured crucial advantages for Scaffolding Company: compliance with the tight schedules required by project planning, optimum working conditions for the formwork and a high degree of safety during assembly work.

    NBMCW May 2016

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