Anticollision






In the years 1970 and 1980 there occurred, for building cranes, a reduction of the travelling distances and an increase in the jib lengths. During the same period, the method of the "tunnel formwork", widely used after the second world war, is being progressively abandoned while the complexity of the buildings increases dramatically. As a result, the construction methods involve the bringing of the cranes closer together, creating consequently extended zones of interference between them.

Thus, the common operating zones increase so much the more that the demand for reduced construction times pushes the number of cranes up.

The direct consequence of which is the appearance of a new risk: the collision between the cable of the high cranes and the jib or counter-jib of the lower cranes.

At the same time, there arose a demand for efficient tools in order to restrict the movement of loads over sensitive areas (railways, power lines, school yards etc.).

In order to eliminate the anti-collision risk without penalising the site's productivity and to provide moreover crane drivers with efficient help tools, like the working area limitation (zoning), SMIE has developed over the past 15 years anti-collision systems.


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Where does it come from?

What are its uses?

How does it work?

Why choose SMIE?



Where does it come from?


The anti-collision concept was developed in France as follows:

• An initial decree dated from 1947 was very vaguely regulating the conditions of operation of site cranes.
• During the seventies and eighties the operation of some very complex sites (particularly nuclear plants), with more than 30 cranes working together, results in serious and even fatal accidents.
• At the beginning of the eighties SMIE builds and tests the first analogue systems intended as a help to the driver.
• In 1987, the French Ministry of Social Affairs and Employment issues a circular that sets out the general conditions of use of tower cranes with interfering activity areas.
• By the end of the eighties, with the integration of state of art digital technologies, the microprocessor operated systems appear and the concept of anti-collision is strongly developed (2nd generation - CIG20 and 3rd generation - AC243).
• These developments and the corresponding experience lead to the publication of a Technical Note (of 6 March 1991) the further clarifies the legal requirements and their application.

Note: attached also a description of the procedure used to validate a site installation.


LIFTING MACHINERY - Decree of 23 August 1947


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What are its uses?


1/ The SMIE AC243 anti-collision system is a device intended to assist the crane driver against the collision risks between two or more interfering cranes.

It helps the driver to detect and anticipate the collision risk between the moving elements of his crane and those of the adjoining ones.
When a collision risk arises the system takes over and stops the dangerous movements.


Without anti-collision system:

With anti-collision system:

collision anti-collision






2/ The SMIE AC243 system provides also the means to prohibit the sailing over protected zones (work area limitation/zoning)

The system supervises the work area limits permanently, provides information on the closeness of such limits and, if necessary, stops the dangerous movements.
The areas of application are: railways, power lines, highways; schools and other public buildings, and more generally the actual limits of the site.


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zones de survol

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How does it work? (click on the grey circles for more information)

Anti-collision system AC243


CONNECTION BETWEEN SITE CRANES
CENTRAL UNIT
MACHINE INTERFACE TROLLEY SENSOR
DRIVERS DISPLAY
SLEWING SENSOR
BAZIL TRAVELLING SENSOR BIA 2000 CONNECTION BETWEEN SITE CRANES

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Why choose SMIE?


On the eve of the year 2000, dealing with SMIE means, primarily, to benefit from the unequalled experience acquired over the years (since 1985) on more than 5000 cranes fitted out by our own team and twice that many, when you add the experience transmitted to us by our network of professional agents in France and abroad.

The AC243 product:
• is adaptable to all types of cranes, of all manufacturers (including luffing jib or other special geometry cranes)
• the Display (TB30) not only keeps the crane operator posted about his environment relative to anti-collision functions but also provides other precious information such as the trolley position on the jib and slewing angle.
• is easy to install, especially thanks to its connecting cables being all equipped with industrial connectors, the AC243 is very economic because it is 100% recoverable, at the end of each job, and thus transportable from crane to crane; moreover it is 100% compatible with the previous generation (SMIE CIG20).
• the setting (programming) is inviolable thanks to a separate programming box with a secret personal access code, known only to each technician in charge of system setting.

Also SMIE being neutral towards every manufacturer, we are able to fully undertake the complete site operation responsibility, since more and more sites today are being split between several contractors who use different makes of cranes. We can thus treat sites with any combination of cranes simultaneously (for instance Comedil, Liebherr, Potain etc.) and insure a flawless and coherent operation.

Last but not least, there is the "SMIE spirit", involved in a permanent commitment to produce the best results for your satisfaction.

List of crane makes that we have already handled:

Arcomet
Betox
BKT/Zeppelin
Boillot
BPR
Cadillon
Comansa

Comedil
Condecta
Jaso
Kroll
Liebherr
Linden
MCA (China)
Peiner

Pekazet
Pingon
Potain
Raimondi
Richier
Simma
Wolff


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