SKYFFOLDING™ Systems

SKYFFOLDING^TM Systems
Platform-supported boiler in-furnace scaffolding & lifting systems

SKYFFOLDING™ Systems, A flagship brand of KLES, first off build up 'Hydraulic lifting system' on the topmost of the boiler (Heavy girder), and then platform-supported pendant scaffolds assembled at ground/Zero level are lashed down with wire ropes and lifted up at 2m intervals to systematize the upper & the lower scaffold system each, whereupon stepping up work efficiencies by way of stabilization of the system with minimized swaying, while proactively warding off workplace disaster arising from the chain reaction triggered by a failure of a member component, as often seen with traditional upright scaffolds.
Currently, the system has been adopted and operated in most domestic thermal power plants in Korea with over 98%.

Product Configuration

Synchronized precision lifting system

A synchronous system capable of lifting safely with load distribution, keeping up lateral and vertical deviation to a minimum.

Upper scaffolding system to inspect and repair Bundle tubes

Workable for either planned preventive maintenance or contingency maintenance for Bundle tubes on the section of SH Platen and Division.

Lower scaffolding system to inspect and repair Wall tubes

Assembled at Zero Level and then lifted up, distributing the loads with minimizing the risk of progressive collapse. Besides, even more precise repair work can be carried out, by installing the walk plates against all 4 sides of the water wall.

Lower truss (Ground/Zero level)

Assembling the upper & lower supportive Platform after construction of the foundation structure up to Zero (0) level (Slop tube).

The Need

The existing boiler scaffolding in a structure supporting the load from the lower part

Scenes of the collapse of the existing system

Problems raised to existing tower-type scaffolding: The existing tower-type in-furnace scaffolding system, used to maintain and repair the boilers in thermal power plants, resorts to the erection method of stacking scaffolds from the bottom up. When putting up and taking down the scaffolds, the work has to take place inevitably at high places in danger. Furthermore, since all the loads of the system get concentrated to the bottom, it may well lead to the collapse of the whole scaffold system if triggered by missing or breakage of even a tiny part of members. Such workplace accidents brought on by scaffold collapse would be liable to end up with fatal life injuries and losses, while collateral boiler damages and prolonged repair periods give rise to cutting back power production, on the other hand, thereupon incurring considerable financial losses.

A paradigm shift in Scaffold Industry, Cloud Ladder SKYFFOLDING™ Systems!: This innovative top-down scaffold systemizer and its exclusive construction method not only ward off the onset of chain collapse of in-furnace scaffolding but also minimize high-site operations by means of enabling working on ground zero level for assembly and disassembly, thus avoiding safety accidents. In addition, by putting staircases in between scaffold layers instead of ladders, mobility and workability have been greatly improved.

Safety-shield Features

Avoiding the risk of chain collapses

On the heavy girder in the penthouse of the boiler, the strand lift jacks are installed, and then thereto connected by the strand down to the platform which supports the upper and lower parts of the system, so that all the loads can be supported from the top.

Thorough platform & scaffold structure review

Structural safety and stability have been secured by verifying the stress and strain amounts at the upper support points when the loads are applied to downward scaffolds. In addition, the working loads on the scaffold have been figured out and reviewed to the extent to work by 20 persons in one layer of all 4 sides, or by 5~6 persons on each side.

The loosen-proof safety design of the wire clamp

The more load is applied, the farther the clamp tightens the wire rope, therewith beefing up its clamping force.

Easy-to-work walk plate and easy-to-move staircase

Walk plates designed to ensure easiness and convenience for working, together with staircases put in between layers taking mobility into consideration.
In an effort to reduce manufacturing costs and improve installation conveniences, the prefabricated system scaffold components and members are put into use.

Improved work efficiency exceeding 90% in terms of workable spaces

Perfectly improving work efficiencies in detail inspection and repairs by way of putting up walk plates on all fronts against four sides of the water wall.

SKYFFOLDING^TM installation video

Erection Procedures

STEP 1

Locating & Selecting strand inlet holes

Locating and Selecting Roof wall tube holes suitable for avoiding interferences with Boiler internal tubes and HDR on top of the boiler.

STEP 2

Building up of Hydraulic lifting devices on Boiler Heavy Girder and Construction of Lower Truss

Building up lifting devices and load-fixture devices at selected locations
Putting up overall walk plates with Truss structures up to the Zero level.

STEP 3

Systemization of scaffolding platform and pendent scaffolds for Bundle tube maintenance

Assembling and systemizing the wire-rope type scaffolds while lifting the assembled upper scaffolding platform.

STEP 4

Lifting up scaffolding platform and pendent scaffolds for Bundle tube maintenance

Bespoke designing to be perfectly optimized for Bundle tube maintenance.

STEP 5

Systemization of upper & lower-supportive platform

Tying up the assembled Lower scaffolding platform onto the Strand of the lifting system

STEP 6

Putting up wire-rope type scaffolding system onto upper & lower-supportive platform

Assembling and systemizing the wire-rope type scaffolds while lifting up the Lower scaffolding platform mounted with uppermost overall walk plates.

STEP 7

Assembling the pendent scaffold while lifting

Last off, Completing the construction of the SKYFFOLDING™ Systems by putting up walk plates onto all 4 sides of the water wall, by way of lifting up the platform by 2 meters each for one layer of scaffolding.

SKYFFOLDING^TM installation video by power plant boiler capacity

Comparative Advantages

제품설명 기존 시스템비계,SKYFFOLDING에 관련된 표
Item	Tower-type Scaffold	SKYFFOLDING™
Workplace accident avoiding technology	High risk of workplace accidents due to mandatory work at high places High risk of the entire collapse of the scaffold system when the load is concentrated	Working on the Zero level, minimizing work at high places No risk of the system collapsing even when overloaded
Easy to Work with	Unavailable to disassemble a part of the system Using a vertical ladder for interlayer movement	Available to disassemble partially (note: the absence of interference with scaffold when water wall tube is replaced) Easy to move, using built-in staircases to move between scaffold layers
Work efficiency	Limited mobility results in poor workability in detail inspection and repairs, primarily due to only partially installed scaffold in such a distant interval as 6 meters high Needing skilled workers to put together/put apart scaffold members Work efficiency less than 50% in terms of workable spaces inside the boiler	Significantly improving workability in detail inspection and repairs by and through scaffold installation on all fronts against four sides of the water wall, narrowing the distances between scaffolds as close as 2 meters high Easy to put together and take down by simplified standard scaffold structure, needless of the help of the skilled Work efficiency exceeding 90% in terms of workable spaces