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Administration Facilities, Donaueschingen, Germany
Shuttering times cut by 50%
Costs for reinforced concrete wall drastically reduced
Quality, inexpensive manufacturing costs and short building times have always been the chief objectives for cost-effective construction whereby the setting and dismantling of the formwork take up a substantial share of the time required to construct concrete elements.
Possible savings potential can be found in the preparation phase with project-related formwork planning and concreting cycle times. Formwork manufacturer PERI uses another approach through consistent further development of its formwork systems.
Moving parts determine time and effort required for forming
“More parts – more wages ; less parts – less wages“! The less (different) individual parts a formwork system actually needs, means greatly improved shuttering times! Time measurements taken by PERI engineers have showed that a considerable part of the time required for formwork erection is spent on searching for parts, clearing up and manual transportation. Not without reason, therefore, that PERI TRIO is the leading wall formwork system as only one connecting part is necessary – the BFD alignment coupler. A further, very important point is the time and effort required for the ties which, after all, takes up a quarter of the overall shuttering time.
TRIO Housing: only one tie for a 3.30 m concreting height
With the TRIO Housing panel formwork system, PERI has succeeded in optimising these tie positions. However, not only have the number of ties been reduced but also the time and effort for the ties themselves due to the constructive anchor arrangement. Up to a concreting height of 3.30 m (TRIO Housing 270 with 60 cm extension panels), only one tie level is necessary. Thus, for the 5.40 m x 2.70 m large-sized element, only six ties are needed. This means that, including extensions, almost 3 m² of formwork surface is taken care of per tie. Using TRIO Housing 360 allows concreting heights of up to 4.20 m with only two tie levels. Corners can be formed with both systems without ties.
One-sided tie operations
For TRIO Housing tie positions, only one tie component is actually used. This is particularly advantageous as work only has to be carried out from one side and workers remain standing on the ground. The conventional six individual parts such as tie rod, wingnut counterplate, PVC tube and anchor cone are thereby radically reduced to only 1 element.
The biggest savings are achieved as a result of the reduction in tie levels and, at the same time, the use of only one component per tie position!
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| PERI system, brukt på byggeplassen |
TRIO Boligform
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Proved and tested in practice
Further proof of the system´s advantages was a recent project in Donaueschingen, Germany, where TRIO Housing was used to build new administration facilities. Compared to panel formwork, shuttering times were reduced by more than half. For this particular project, TRIO Housing 360 was used. The three-man formwork crew was able to construct around 27 linear metres of basement wall per day. Not least because the few loose accessories, such as tie elements and alignment couplers, were always available in special storage boxes fitted to the formwork. Also, the completely equipped concreting scaffold is securely attached to the internal element, thus conforming to current industrial safety regulations.
Most work operations can be carried out with personnel standing on the ground. Search time for parts, clearing up as well as manual lifting and moving procedures were also noticeably reduced.
Job safety
Most work procedures with TRIO Housing, such as anchoring and attaching the formwork to the crane, take place from the ground resulting in excellent time advantages as well as increasing job safety conditions at the same time. Required safety accessories are securely installed on the formwork which means their use cannot be overlooked. This led to a noticeable increase in productivity.
High quality concrete surfaces
Through the use of large-sized formwork elements, there were very few element joints. In addition, because the formlining is screwed on from the back in the TRIO Housing system, no markings caused by screw or rivet heads can be seen on the concrete surface. Owing to the very high element rigidity, deflections were extremely hard to detect.
Contractor´s expectations exceeded by far
Compared with standard panel formwork, TRIO Housing 360 does not require even half the usual shuttering time. Supervisor Heinz Gass, from contractors Gebr. Stumpp GmbH & Co. KG in Rottweil, was very impressed with the system, especially as work carried out on the tie positions could be done from the ground. Furthermore, no additional ladders or scaffolding was needed. |
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| Contractor: |
Gebr. Stumpp GmbH & Co. KG |
| Contract Manager: |
Andreas Oehler, Gebr. Stumpp GmbH & Co. KG |
| Foreman: |
Mr. Gass, Gebr. Stumpp GmbH & Co. KG |
| Field Service: |
PERI VIB Baden-Elsass, Offenburg |
| Sales Engineer: |
Jens Bertiller, PERI GmbH |
| Technical Support: |
Hermann Stehle, PERI GmbH |
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Avdeling:
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PERI GmbH, Germany
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Press Release, April 2005: TRIO Housing
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