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PRECAST CONCRETE ELEMENTS210 CPI %u2013 Concrete Plant International %u2013 5 | 2025 www.cpi-worldwide.comBoxes and QT Boxes can also be ordered in two distinct versions: one with a plain slot for creating a sliding restraint, and one with teeth (QT) or knurling (ST) to enable a fixed restraint.The QT Box is particularly recommended where the available space within the element is limited, whereas the self-anchoring ST Box is preferable when more installation clearance is available and there are no packaging constraints. To accommodate both sliding and fixed connection types, Edilmatic supplies a range of dedicated accessories, adaptable to the specific housing configuration.Specifically, the following are available:For the plain-slot versions: the GSC sliding joint, the spacer ring, and the CQT counter-plate.For the toothed or knurled-slot versions: the GA34 joint (for QT boxes) and the CP38 counter-plates (for ST boxes).All of these components are engineered to ensure maximum reliability and ease of installation, enabling precise, secure mounting tailored to the requirements of each structural application.The maximum load capacity of the systems depends on the type of Recessed Profile employed.All devices are CE-marked in accordance with UNI EN 1090-1:2018, Execution Class EXC3.The design of a fixed connection requires verification of both the system%u2019s tensile and shear strengths. In this case, the ultimate capacity of the joint is governed by the Recessed Profile, which constitutes the system%u2019s weakest element.The design of a sliding connection requires checking the tensile strength and the maximum allowable relative displacement, which must be compared to the length of the slot. nFURTHER INFORMATIONAnchorage, supporting and lifting systemsfor prefabricated elements. Structural andanti-seismic connections. Edilmatic S.P.A.Via Gonzaga, 11, 46020 Pegognaga (MN), ItalyT+39 0376 558225 info@edilmatic.it www.edilmatic.itRTeething and Knurling details in ST BOXES (a) and QT BOXES (b).a) b)Restraint assembly accessoriesQT box and hollow profile inserted into the structural elements