The connection element is always at the center of Peikko Italia's research and insights.Even for thin elements, such as continuous concrete walls, Peikko offers systems for mechanical fastening of these elements. Intelligent systems for mechanical fastening of precast concrete wallsPeikko Italia has studied intelligent systems to fix thin elements such as walls with mechanical connections: the anchor bolts for shoes for walls transfer, in fact, the traction, compression and shear forces to the base structure in reinforced concrete.The connection solution proposed by Peikko for this type of construction element is very similar to those illustrated previously, i.e. the connections for beams and pillars, only they must necessarily be thinner.The fastening concept remains the same: having a threaded anchor bolt inserted in the bearing element and a shoe in the concrete element.For the wall, being a thin element, Peikko has therefore studied a system where the shoe, with respect to the anchor bolt, is composed of two anchoring bars arranged symmetrically with respect to the axis of the anchor bolt and this means that there are no efforts that have to be transferred to the concrete, these stresses, especially acting on the back of the shoe.These are Anchor Bolts with special AL washers that are used in conjunction with SUMO® Wall Shoes, and are based on standard HPM® and PPM® Anchor Bolts.Diagram of forces in action with SUMO® wall shoes and standard HPM® and PPM® anchor bolts.Bolted connections for precast concrete wallsThe SUMO® wall shoe has been specially designed for this type of application, however starting from the same system developed for the connections of the pillars and beams.In the connection for walls, the shoe proposed by Peikko has a rather large hole to allow for mounting tolerances and uses a special washer larger than those used in the beam-pillar connections: it is a square plate that is able to connect the bolt to the wall shoe through the large hole.The advantage lies in the fact that with these same elements it is possible to create prefabricated concrete walls by breaking these elements and connecting them to each other, or by connecting the same elements to the foundations, by means of simple mechanical connections.In traditional systems, for example, it often happens that the prefabricated building uses pins that protrude from the upper element and enter the corrugated tubes of the lower element, protruding details that contribute to hindering the operations on site.These systems are generally used to build the walls of electrical substations, for example where concrete walls are connected to the foundation through the Sumo elements inserted in the concrete panel.Recently this same system has also been used for the construction of the walls of a minaret of a mosque, a sort of bell tower composed of prefabricated elements connected together with the Sumo shoes and the log bolts left in the lower element.Some further details on Peikko shoes and anchor boltsPeikko proposes, as for the other anchor bolts, two types of shoes that are coupled together according to the diameter of the anchor bolt and its capacity.There are a series of standard anchor bolts consisting of an improved adhesion bar threaded at the end.High resistance anchor bolts are then proposed which instead consist of a single central threaded bar and two to four bars with improved adherence that anchor the central bar in the concrete.Specifically, there are long log bolts (type P), used in the junctions of prefabricated elements and short log bolts (type L) with hammer head, used for anchoring to foundations.Long Anchor Bolts transfer compressive and tensile forces through the improved steel-to-concrete adhesion of the rebar ribs, while Short Anchor Bolts transfer them due to the combination of improved grip and hammerhead strength.Sumo® wall shoes are connecting elements designed to pull prefabricated walls together and therefore adapt to both of these two types of anchor bolts: the choice between the two types of anchor bolts depends on the size of the panels and the load that support these elements and according to the stresses to which the element is subjected.The way in which these systems have been conceived also have an advantage for the formwork used for casting the concrete which does not have to be drilled, but remains continuous thanks to the fixing of the threaded rod with its nut and washer that allow the positioning of the next panel.The tightening of these elements, as for the others already mentioned, takes place during the assembly phase and is carried out by force, but without the need to resort to a twisting torque.It is important to remember that all these types of inserts studied by Peikko have been designed to exert actions on the load-bearing elements of the structures or as connections between the load-bearing structures and are therefore absolutely compatible with the expected life of the latter.CLICK HERE - DOWNLOAD THE SUMO® WALL SHOE TECHNICAL MANUAL FOR FREEPeikko is a family business founded in 1965 with headquarters in Lahti, Finland What Peikko doesPeikko provides a wide selection of connections for concrete and composite beams, for both precast and cast-in-place solutions, for a wide range of applications.Peikko's innovative solutions make the construction process faster, safer and more effective.Our goal is to serve customers locally with cutting-edge solutions in terms of quality, safety and innovation.Peikko has a strong interest in introducing innovative and proven solutions and services.Therefore, investments in research and development are among the highest in the sector.Read also Innovative systems for pillar-foundation and pillar-pillar connections Guaranteed connections between beams and prefabricated pillarsSuperbonus: Revenue Agency maxi-circular with clarifications on credit transfer, deadlines, expenses, obligationsPost-earthquake reconstruction, the countdown for the Reform begins: the 13 guidelines of the CodeBuilding amnesty of the demo-reconstruction: if the original property is illegal, no conformity assessmentSuperbonus 110%, updated Revenue Agency guide with news for credit transfer, fragmentation, villasRenewables: photovoltaics grow in the first three months of 2022, hydroelectric picks up and wind power fallsSismabonus Acquisti, there is an extension: the PNRR 2 Decree postpones the sale to 31 December 2022Superbonus, Construction chain: immediate meeting with political leaders to unlock creditsSuperbonus 110%: the Senate approves a resolution to unblock credits and to expand the assigneesFake news about the resistance of the external insulation system: it is not true that it does not resist the attack of birdsBuilding abuses, keep an eye on the past: there is always the responsibility of the owner of the propertyThe climate and the weather of the future: knowledge and perspectives from the scientific community for societyWhat drives an engineer to leave Italy to work abroad?Smart Infrastructures Academy 22/23: registration is openBuilding in height: best practices and challenges, the point at the Tall Buildings ConferenceGalleries: Cte organizes a conference on ring coverings of prefabricated blocks made of TBMRedevelopment of the building stock: GBC Italia presents the new condominium protocolThe most important Technical Project Information Portal at the service of Architects, Surveyors, Geologists, Engineers, Experts, technical profession, Professional Register, Professional Rates, Technical Standards, Inarcassa, Structural Project, Seismic Improvement, Architectural Project, Urban Planning, Energy Efficiency, Energy renewables, Recovery, Reuse, Renovations, Free Construction, Procurement Code, Thermotechnical Systems Project, Digital Modeling and BIM, Technical Software, IOT, ICT, Lighting Technology, Work Safety, Fire Safety, Construction Technologies, Forensic Engineering, CTU and Appraisals, Evaluations Real Estate, Certifications.INGENIO-WEB.IT is a periodical publication of IMREADY Srl registered with the Secretariat of State for Internal Affairs of San Marino with protocol n.638/75/2012 of 27/4/2012.Responsible Director: Andrea Dari.Copyright 2022 IMREADY Srl All rights reserved.Privacy Policy, Site created by Global Sistemi CreditsIMREADY Srl, Strada Cardio, n.4, 47891 Galazzano, RSM, Tel. 0549 909090 Mail: secretariat (@) imready.it