The regulation system is concealed by the sleeve, for optimal aesthetics. The fastening can also be made with LBS screws page The TTF angle bracket can be dowek in combination with different resilient acoustic profiles inserted below the horizontal flange in full pattern configuration. I turned the "curtain" right side out. The results in a continuous and homogeneous layer, impenetrable to the passage of water. You know how you just want something long wooden dowel rods jp after a few years of the same old look?

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No matter what. Values are certified, tested and consolidated. Partial nailing is necessary for beam-column joints in order to observe minimum fastener spacings; it can be applied also for beam-beam joints.

Partial nailing is performed by nailing each column alternately as shown in the picture. Install the anchors two at a time, starting from the top, dowelling alternate rows. The design values of the anchors for concrete are calculated in accordance with the respective European Technical Assessments.

For different calculation methods, the MyProject software is available free of charge www. A numerical model has then been proposed and validated on the experimental results Rothoblaas experimental method. All values are calculated and certified. Being a concealed joint, it satisfies the fire safety requirements. The version without holes provides free choice when positioning the dowels.

For different calculation methods, the myProject software is available free of charge www. Download them now! The concealed cylindrical head ensures an optimal visual appearance and meets fire-resistance requisites. The longer under-head thread b2 allows quick and precise closing of the joint.

The small dowel diameter guarantees joints that offer high stiffness. Available in 1,0 m long version. Improved bond version ideal in seismic areas. When used with wood taps it meets the fire safety requirements and provides a rewarding aesthetic appearance. Available upon request:high bond steel and shaped to avoid pull-out when used in seismic areas e. Minimum quantity pieces. To be used in service classes 1 and 2 EN The knurling also responds to the provision of EC8 aimed at preventing the cylindrical shank elements from coming out from the joints in the seismic zone.

Joint that can be easily disassembled, ideal for the construction of temporary structures. Ideal for structures, gazebos and furnishings. It can be integrated with side locking plates and vertical anti-slip screw. Thanks to the assembly with only one type of screw, installation is quick and easy.

Innovative joint with exceptional strength values. The HF dimension refers to the minimum height of the grooving at constant width. The rounded part must be taken into account when grooving. For installation on column, respecting the minimum distance of the screw from the unloaded end of the column, requires to lower the connector by a quantity c, compared to the end of the column.

This can be achieved either by raising the column with respect to the to the top of the beam as in the image or by lowering the connector with respect to the top of the beam by a c amount. In case of installation without pre-drilling hole, the LOCKT connector must be installed 5 mm lower than the upper wire of the secondary beam, in order to respect the minimum distances of the screws.

In case of installation with the floor aligned with the top wire of the wall, the connector should be installed 10 mm from the top edge of the CLT floor. This allows the minimum distance between the screws in the wall with respect to the top of the panel.

In this case, the minimum Long Wooden Dowel Rods Model thickness of the h P floor is mm. Place the connector on the main element and fasten the first screws. Place the connector on the secondary beam and fasten the first screws. Carry out the grooving on the main element. Place the connector on the main element and fasten all screws. The image shows the positions for the optional inclined holes.

The strength value can be accepted as valid, for higher safety standards, even in the presence of pre-drill. In particular, for loads perpendicular to the beam axis, it is recommended to perform a splitting check in both wooden elements. It is possible to use screws of different length in the two connectors, main element side and secondary beam side. Easy and quick to install, it can be fastened with a single type of screw.

To be used in service classes 1, 2 and 3 EN Possibility to uninstall the joint for seasonal needs. Easy to hook system with screw anchors on the concrete side and self-drilling screws on the wood side. When installed without grooving, it generates an aesthetically pleasing joint shadow. Ideal for the restoration or renovation of existing buildings.

Concealed fastening and easy to install. Screws and anchors not included in the package. Place the connector on concrete and fasten the anchors according to the installation instructions. Place the connector on the wooden beam and fasten the first screws. In the same way, for fastening on steel using countersunk head bolts, the calculation of the fasteners on steel can be carried out with reference to the regulations in force for the calculation of bolts in steel structures, following the diagram shown aside.

In particular, for loads perpendicular to the beam axis, it is recommended to perform a splitting check. The strength values are valid for the calculation hypotheses defined in the table; for boundary conditions different from those in the table e.

Strength over 60 kN. The joint is safe even in the presence of wind and earthquake forces. The locking screw prevents pull-out, guaranteeing also strength in the direction opposite to insertion. The minimum dimensions of the wooden elements vary when the stress direction varies and must be checked from time to time.

The table shows the minimum dimensions in order to guide the designer in the choice of the connector. Dimensioning and verification of the timber elements must be carried out separately. Partial nailing must be carried out according to the installation diagrams shown in the figure and in accordance with ETA. In case of Fv or Fup stress, an additional inclined screw is required in the main beam to be inserted after installing the connector.

On the secondary beam side, inclined screws must always be inserted in the upper two holes and the two lower holes. For different values of "e" it is possible to calculate the strength values according to ETA. Values for application on concrete are calculated and available. If it is necessary to prevent the connector from being pulled upwards e. Fup stress , two additional M6 x 20 screws are provided.

The screws and washers are included in the package. The use of LBS and VGS screws of longer lengths than listed in the table is permitted without affecting the overall strength of the connection failure on concrete side. In this case the installation parameters must be reassessed secondary wooden beam. The table shows v,k timber the minimum dimensions in order to guide the designer in the R choice of thekmod connector.

CE mark according to ETA. Fast and precise fastening thanks to LBS screws. For installation without grooving, the minimum bolt distances according to EN apply. For shear stressed connectors in timber-to-timber joints For shear stressed connectors in steel-to-timber joints. When using the connector with grooving in the main beam, if a Flat stress is applied, it is necessary to perform a closed circular grooving.

The strengths do not vary in both cases. In case of multiple installation, it is recommended to install the connectors alternating them with option 1 and option 2. CTC, the connector for timber-to-concrete composite floors CE certified, it allows to connect a 5 or 6 cm reinforced concrete slab to the timber beams of the underneath floor, obtaining a new timber-concrete structure with extraordinary strength and excellent static and acoustic performance.

It is an approved self-drilling, reversible, fast and minimally invasive system. Find out more now! The assembly must be performed so as to guarantee that the stress is evenly distributed among all the installed VGU washers. The coefficients kmod and yM should be taken according to the current regulations used for the calculation.

Valid limit value considering the centerline of the plate centered at the interface of the timber elements, using all connectors. Depending on the design requirements, it is possible to create a concealed connection by grooving the timber elements 35 78 according to the indications on the table. When used for moment joints, a suitable connection system must be used to absorb shear loads.

Minimum column dimensions using the screw lengths in the table, considering the plate centred at the interface of the timber elements. Strength moments calculated with elastic-linear bonds, considering the deformability of the screws in the stress distribution. Available also in sheets to be conveniently cut depending on the work site needs. Model with CE mark to guarantee the suitability for use. This results in a more homogeneous and less severe stress on the wood component.

Since the force is concentrated, when using these connectors it is necessary to respect the minimum distances and spacing, in order to avoid fragile failures along the stressed wood fibre. In addition, when using connectors with a large diameter, there is a considerable weakening of the net cross-section of the timber elements at the drill holes.

In addition, the diffused force mechanism is also applicable to joints usually made with cylindrical shank connectors providing an increase in stiffness and strength. The plate concealed in a grooving transfers the loads thanks to the resin, which adheres perfectly to the sandblasted plate, or engages in its cavities if it is grooved.

The strength of the connection is dependent on the timber due to the adhesives over-performance. Applicable by roller, spray and brush. Component A classification: Eye Irrit. Component B classification: Acute Tox. XEPOX L - liquid Two-components epoxy adhesive for structural usage, very fluid, applicable via pouring into very deep vertical holes and suitable for large joints with hidden bits placed in quite extended grooves, also good in case of reduced spacing 1mm or more , provided that the slots are accurately sealed.

Pourable and injectable. XEPOX F - fluid Two-components epoxy adhesive for structural usage, applicable via injection into holes and grooves, provided that the slots are accurately sealed. Preferable for binding timber connectors bent Turrini-Piazza method into timber-concrete composite floors, both with new and existing beams; gaps between timber and metal of approximately 2 mm or more.

Percolation into the vertical holes in the groves after inserting the metal plate or rod bits. Pourable and injectable with cartridge. XEPOX D - dense Two-components epoxy thixotropic dense adhesive for structural usage, applicable via injections especially into horizontal or vertical holes in Glulam and solid timber beams, masonry or reinforced concrete walls.

Injectable with cartridge. Component B classification: Repr. XEPOX G - gel Two-components epoxy gel adhesive for structural usage, applicable via trowel also on vertical surfaces, permits the realization of thick or uneven layers. Suitable for large timber overlaps, for gluing structural reinforcing elements by using glass or carbon fiber textures and for metal or timber coatings.

The components are packaged in pre-measured quantities, ready to use. The ratio is by volume not weight. It is best not to use more than one litre of mixed product at a time.

The weight ratio between components A:B is around ,4. Do not store the package in cold temperature environments, as it may increase the viscosity and hinder the pouring and the cartridge extrusion. Do not leave the package exposed to direct sunlight, as heat reduces the polymerisation times.

If the temperature is too cold, it will be necessary to warm up the packages at least one hour prior to using them or warm up the application sites and the metallic bits before percolating the product. If the temperatures should be too high, it will be necessary cool the product down, avoiding the hottest time of day. If the parts expecting the potting are wet, it is mandatory to dry them. To change the amount of adhesive to be injected, cut the end of the nozzle.

For gluing long rods, it is recommended to prepare filling holes at right angles to the rod. Especially during hot seasons, it is necessary to protect the metallic surfaces from direct sunlight. Next, apply a continuous bead of acetic silicone and apply pressure so that it also adheres to the surface protected by the tape.

The outer grooves of the sloping elements must be sealed with strips or wooden planks, leaving only the end of the grooves uncovered at the highest point from where the adhesive is exposed.

To use the product in drums, poor the hardener component B into the drum containing the epoxy resin component A. Vigorously mix the two different coloured components. We recommend a suitable mixer with a double helix mounted on an power tool; alternatively a metal whisk can be used.

Mix until the colour is consistent. Pour the resulting mixture. To distribute the mixture into crevices of significant length and for castings, pour directly from the drum or spread the product with a spatula. To guarantee the correct positioning of the bits in the grooves, place spacing washers in the inserts during the protection polymerisation phase with XEPOX P. XEPOX epoxy adhesives are two-component resins specifically formulated to penetrate the microstructure of wood and adhere to it with great effectiveness, and to reduce the typical resin crystallization.

The mixture of components A and B causes an exothermic reaction heat development and, once hardened, forms a three-dimensional structure with exceptional properties, such as: durability over time, interaction with no humidity, excellent thermal stability, great stiffness and strength. Each chemical or mineral element of the formulation has a specific role and all together they contribute to the achievement of the performance characteristics of the adhesive.

The use in combination with steel, in particular plates, sandblasted or drilled, and rods, allows to provide high strength in limited thickness. The effective area considers a square of timber with a maximum side of 6d; the area is reduced for smaller distances between the elements or from the edge.

The shear strength of a rod can be calculated using the well-known Johansen's formulas for bolts with the following measures. The hollow effect is evaluated as the strength given by the extraction bonding failure b. This demonstrates the existing safety margin: however, it should be remembered that the value resulting from the test is not a characteristic value and is not intended to be used in the design.

NOTES: The tensile strength was derived from the average density of the specimens used for the tests. The stresses due to the moment and the axial action are determined by homogenizing the materials of the section, in the hypothesis of conservation of the flat sections.

The shear stress is absorbed only by the plates. It is also necessary to check the stresses acting on the timber section net of the grooved sections. The moment is distributed over the number of interface surfaces and then broken down into stresses, considering both the polar inertia around the centre of gravity and the different rigidity of the wood.

In this way, the maximum tangential tensions are obtained in the orthogonal and parallel direction to the fibre, to be verified also in their interaction. Polar moment of inertia of half the bit with respect to the centre of gravity, weighed on the timber cutting modules: li h3 The overstrength factor between the test and the calculation is determined, which demonstrates the good safety margin that exists in the calculation of the joints.

The value resulting from the test is not a characteristic value and is not intended to be a use value in the design. The graph shows the greatest displacement of the stretched fibres, validating the calculation hypothesis that timber reacts to compression together with the metal components, moving the neutral axis upwards.

In support of this, we compare the deflection values obtained from analytical calculations for an unjointed beam of equal span, cross-section and load with the experimental data in calculation example 1. To obtain a deflection reference value from the available experimental data, an operating load must be determined. To achieve this, it is possible to consider the strength moment of Starting from this data, and assigning a realistic load distribution on the beam, it is possible to determine a maximum stressing moment in operation using the load amplification coefficients according to the reference standard.

Assuming therefore to dimension a flat roof made of timber that cannot be walked on, the following loads are defined. As a result, the maximum working moment is However, the formula does not take into account the stabilization of the wood fibres offered by resin, which fills the wood voids; the designer can decide to increase this factor.

The calculation of the cross-section has been made considering elastic-line bonds for all materials. It should be noted that in case of axial and shear loads, it is necessary to check the combination of these forces. In this calculation, it is considered that the resin bearing allows full contact of the interface section, and therefore the timber can react to compression.

If the bearing is not made, it is advisable to check the metal bit alone as a reagent, applying the formula with the geometrical parameters of the bit:.

XEPOX adhesives are characterized by tensile and shear strength values much larger than those of timber and with constant value over time. Due to this reason the interface torsional capacity check can be performed only on the timber element, considering the same check satisfied by the adhesive. These stresses are compared for the wood shear strength and the rolling shear strength, respectively.

The calculation made here should also take into account the value of the transport moment MT,Ed resulting from the shear stress, if any. The joint is made by the mechanical engagement of the metal hooks in the timber. The connection performance is comparable to the adhesion of a bonding agent. Non-invasive and uninstallable system. Concentrated forces are eliminated and the problem of minimum distances is reduced. The thickness of the steel 0.

Elimination of waiting times for glue setting and curing. Performance comparable to gluing. Fv Fv. The hooked plate provides considerable confinement to the timber, increasing its strength against splitting failure due to loads parallel to the fiber acting on the screws.

The use of screws is also recommended for supporting tensile loads between connected surfaces, e. Although the vertical loads of the deck ensure adequate pressure between the surfaces, it is possible that tension is transmitted. The screws, in this case, absorb the stress without affecting the shear connection engagement. In order to check possible scale effects, different plate lengths were tested and pressure was guaranteed with screws.

The values in the table are derived from the experimental data from which the strengths of the test screws have been deducted. The values in the table correspond to the experimental data with TBS 8x screws at 10d 80 mm pitch with under head timber thickness of 60 mm. Horizontal actions can be schematised as loads acting on the floor levels. To guarantee the adequate seismic performance of timber buildings and avoid all the possible failure modes, it is fundamental to design all the connection systems correctly.

Horizontal loads acting at the floor level introduce shear and tension forces on the structural elements of the building; these forces must be absorbed by an effective connection system. A complete range of joints for walls and buildings also allows for innovative design approaches.

They are used for both timber-to-timber and timber-to-concrete connections. Depending on the specific model, they can be used to transfer tensile and shear forces, or a combination of both forces. The addition of special washers improves their performance and versatility. They allow the transfer of both tensile and shear forces; depending on the type used, they are suitable for both timber-to-timber and timber-to-concrete connections.

Using fasteners with different diameters means that a wide range of strengths can be covered. A new range of simple solutions are available to solve complex problems from small residential buildings to multi-storey buildings.

These solutions offer the opportunity for designers and builders to break the mould and find innovative solutions. This research project involved different institutions. The scientific report on experimental testing is available at Rothoblaas.

Cylindrical connectors such as screws and nails under both tensile and shear loads, for timber-to-panel, steel-to-timber and timber-to-timber joints. WHT: S bright zinc plated carbon steel. Experimentally the ultimate strength of the LBA nail and of the LBS screw is notably larger than the characteristic strength evaluated according to EN The coefficients kmod, yM and ysteel should be taken according to the current regulations used for the calculation.

The axial load acting on the anchor can be obtained as follows:. Ideal for a multitude of on-site uses, it is certified and can be used for both axial and transverse loads. Different full pattern and partial pattern fastening configurations.

The strength values shown in the table are to be considered as indicative values provided to guide the designer in the choice of the TITAN angle bracket. The final verification must be carried out in accordance with the technical specifications given on the individual product pages, depending on the design requirements and the actual boundary conditions.

Values also certified with partial fastening for presence of bedding mortar or root beam. Up to 82,6 kN on concrete with TCW washer.

Up to 46,7 kN on timber. R1,k up to 69,8 kN characteristic values. It can be integrated into the floor panels. Values certified also for partial fastenings and with interposed acoustic profiles. Ey calculation eccentricities vary depending on the type of installation selected: 2 internal anchors IN or 2 external anchors OUT.

The TTN angle bracket can be installed in combination with different resilient acoustic profiles inserted below the horizontal flange in full pattern configuration. Profile thickness: in the case of ALADIN profile, the calculation took into account the reduced thickness, due to the corrugated section and the consequent crushing induced by the nail head during insertion.

The connection design strength values are obtained from the values on the table as follows:. The coefficients kmod, y M and ysteel should be taken according to the current regulations used for the calculation. Verify that there are no brittle fractures before reaching the connection strength.

The strength values are valid for the calculation hypotheses defined in the table; for boundary conditions different from the ones in the table e. Up to 85,9 kN on concrete with TCW washer.

Up to 60,0 kN on timber. R1,k up to 75,9 kN characteristic values. Certified values also with interposed acoustic profiles. The TTS angle bracket can be installed in combination with different resilient acoustic profiles inserted below the horizontal flange.

Profile thickness: in the case of ALADIN profile, the calculation took into account the reduced thickness of the profile itself, due to the corrugated section and the consequent crushing induced by the nail head during insertion. It also has certified values for use with partial nailing. FRAME Thanks to the lowered position of the holes on the vertical flange, it offers excellent shear strength values even on low height platform beams.

R2,k up to The high shear strength allows to optimize the number of fastenings. The TTF angle bracket can be installed in combination with different resilient acoustic profiles inserted below the horizontal flange in full pattern configuration.

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