Schöck Bole innovation, anti-punching frame

Efficient and reliable, this new ready-to-use system, quick to implement both in a prefabrication factory and on site, increases the punching resistance of concrete slabs resting on point supports such as posts, wall heads, etc. Thus, reinforcing the reinforcement via the Schöck Bole® reinforcement avoids failure by shearing and offers the advantage of perfectly distributing the loads from the slab to the supporting element.

And as is tradition at Schöck, this innovation is complemented by a set of services: software allowing structural design offices to instantly size Schöck Bole® reinforcements before projects, an installation guide (in addition to the fact that Schöck offers on-site support and training in the implementation of this new product according to the rules of the art) as well as a dedicated CAD / BIM library.

A solution against punching that is easy to implement and guarantees safety

Concrete slabs supported only by posts (without supporting beams) prove to be real assets in public and industrial buildings in terms of interior design and usable volume.

This method of construction, regulated by Eurocode 2, requires ensuring that said slabs are sufficiently reinforced to avoid punching by the posts. To this end, it is particularly appropriate to reinforce the areas close to the posts where shear stresses are significant.

If traditional reinforcements are often complex and their implementation time-consuming (mushroom slabs, floor-slabs with significant thickness, post-beam systems), the new Schöck Bole® system is delivered ready to install, with approved calculation note and diagram installation provided for each connection to be treated, offers a simple, effective and secure technical solution. It is made up of double-headed studs welded to positioning steels which guarantee the spacing between two successive studs. These “barettes” are simply placed in the reinforcements of the concrete slab. No more beams or reinforcements at the top of posts for even quicker and more economical slab formwork! Also at stake: a reduction in concrete volumes compared to a traditional solution and optimization of slab reinforcement, with a positive impact on the IC Construction carbon impact of projects.

It should be noted that Schöck Bole® makes it possible to diffuse the shear stresses at the post-floor junction, offering a gain in the thickness of the floor compared to conventional post-beam-floor reinforcement. Slabs without fallout and optimized clearance height between floors!

It should be noted that there are three variants of the Schöck Bole® anti-punching reinforcement to reinforce concrete slabs requiring reinforcement in line with the posts.

• Schöck Bole® type U is characterized by being installed before the floor is reinforced. It is placed on the formwork of the slab, the plastic spacers ensuring the lower coating and stability of the reinforcement. The lower and upper floor reinforcements are then positioned between the studs.
• Schöck Bole® type O is integrated after the floor reinforcement, with installation from above. The lower and upper reinforcements are first positioned, then Schöck Bole® type O is threaded from above, through the reinforcement layers.
• Schöck Bole® type F is inserted into reinforced concrete slabs. The installation of Schöck Bole® type F is coordinated with the installation of the reinforcements by the prefabricator. The plastic positioning rails fitted with spacers are first placed on the formwork table, while serving as a spacer for the pre-slab reinforcements (guaranteed coating). Then the double-headed studs are assembled directly on the spacers.

Exclusive sizing software, a CAD/BIM library and an installation guide for ever more controlled projects

Free online application, the Schöck Bole® software allows structural design offices to dimension, simply and quickly, Schöck Bole® anti-punching reinforcements from the design stage.

The modeling of a large number of arrangements (slab columns, foundation columns, cast-in-place or pre-slabs), possible structural parameters (characteristics of the concrete and reinforcement) and different geometries (positions and shapes of columns, thicknesses of slab and positions of reservations) offer the advantage of responding to all configurations.

The calculation notes and detailed diagrams from the software are produced according to Eurocodes, knowing that users can integrate the exported diagrams directly into their plans or models.

Thanks to this refined modeling obtained by the structural design offices, the project owner thus has all the cards from the start of the project, combining reliable implementation and perfect control of the budget envelope since the we determine upstream, with relevance, the number and reference of appropriate Schöck Bole® reinforcements. Schöck also makes available on its site a CAD/BIM library dedicated to Schöck Bole® anti-punching reinforcements where 2 D and 3 D format files are offered, integrating all the technical specificities of the selected product (diameter, height, number to put implemented, distance rule, etc.).

Finally, Schöck has published a very comprehensive installation guide detailing good practices for implementing Schöck Bole® depending on the construction site. Advice and tips for optimizing their installation are illustrated and make it a 100% operational educational tool.

Guyot Environnement waste treatment plant in Saint-Martin-des-Champs (29). Installation of more than 1.000 Schöck Bole® type O anti-punching reinforcements

Schöck was involved in the construction of a waste treatment plant in Saint-Martin-des-Champs, near Morlaix, in Finistère, signed by the Brest project management firm Ingénierie Concept Construction, with the Project Manager Guyot Environment.

On 8.000 m2 of covered buildings, this new generation factory will treat 65.000 tonnes of industrial waste each year from economic activities and community recycling centers (all-purpose waste, non-hazardous waste, bulky waste mixed). The installation participates in the strategy of the Guyot Group, which has invested 28 million euros in it (including 18% aid from ADEME): optimize the sorting of waste in order to better recover it (particularly ferrous and non-ferrous metals). , wood, plastics, rubble), respond to the development of new sectors (REP building, etc.) and significantly reduce landfilling, the ultimate residues, transformed into CSR (solid recovered fuels), to fuel another project, that of a 20 MW boiler room at the port of Brest run by Guyot energies.

In order to build these waste storage and processing halls, a low slab of 2.000 m2 had to be created, with maximum stability given the expected repeated passage of dump trucks weighing up to 38 tonnes. If the option initially considered consisted of installing beams between piles, then pouring the lower slab onto these beams, the Schöck Bole® solution recommended by the structural design office Secoba Delamare made it possible to save on costs. The tedious and time-consuming stage of digging trenches in rocky ground to pour the so-called sills.

Thus, the construction company Personnic favored a so-called “floating” implementation of the elements, that is to say an installation after the installation of the steel layers formed by welded mesh and large diameter bars. . The vertical rods of the Schöck Bole® elements were therefore inserted through the mesh of these steels. The rails to which the rods are welded at their upper end rest on the upper latticework of the slab and allow the Schöck Bole® rods to “float” between the steel layers of the slab. The rails with Schöck Bole® elements are installed in a radius around the area covered by the piles, which allows the forces to be distributed over a circle and to avoid “punching” type ruptures.

1.000 Schöck Bole® type O anti-punching reinforcements were thus implemented.