So far, main-/ secondary girder connections are implemented e.g. through steel sheet mouldings (joist hangers). This is a complex, visible and partly unattractive connection.
Two fully threaded screws fischer Power-Full are ... in an angle of 45 degrees and are screwed crossed. Thereby, the screws receive also shear loads. Therefore, main- and secondary girders can be connected fast and invisible.
The traditional connection can open itself and lead to larger shifts, because the connection has no guaranteeing tensile strength. Secondary- and main girders can finally rip.
Through the restructuring with the help of the fischer Power-Full a belated, stiff and tensile strong connection can be restored and again guarantee a safe force transmission.
The sole connection with dove tail is hard to measure and doesn't show enough stiffness.
The interaction of dove tail- and Power-Full-connection enables the combination of simple installation and efficient connection.
Rafters and purlins are either connected with rafter nails (little load-bearing capacity) or with partial-thread screws. Also time-consuming rafter-purlin-anchors (steel sheet mouldings), which need to be nailed out, are being used.
Through the vertically into the rafter screwed fischer Power-Full, the load-bearing capacity will increase significantly. Also head draught, which occurs due to a wind suction to rafter nails or partial-thread screws, will be prevented. Another benefit is the time saving in comparison to rafter-purlin-anchors during the installation.
Unreinforced notches are holding the risk of cracks or breakdowns at the notched coating. The notches are getting strengthened with glued-laminated timber material boards or glued threaded rods.
The shear reinforcement with fischer Power-Full enables a significant higher load intake. The smaller screw heads ensure an attractive, rarely visible timber construction.
Breakthroughs in ceiling joists and girders are often necessary, which increase the danger of shear cracks / -breakdowns. This breakthroughs are getting strengthened with glued-laminated timber material boards or glued threaded rods.
The shear reinforcement with fischer Power-Full is also allowing here a significant higher load intake over unreinforced cross sections. This ensures the reinforcement of the wooden beam near the breakthrough across to the wood fibre direction. Additionally, the installation effort can be significantly reduced in comparison to conventional reinforcements.
Due to a belated increase of the dead load of the ceiling, it can come to massive deflections and increased vibration problems of old wood beam ceilings, especially in old buildings. This problem is solved by "anchoring" the girders together, e.g. through wood inserts or plugs with special designs.
The consisting girder will be connected through inclined screwed Power-Full screws with an additional wooden beam. Therefore, its load-bearing capacity will increase and the deformation behaviour will be reduced.
The conventional main- / secondary beam connections without shear reinforcement have a high danger of development of shear cracks and finally also of shear breakdowns.
The fully threaded screw fischer Power-Full increases the shear load-bearing capacity of the main girder significantly, by strengthening the main girder across to the wood fibre direction.
Coupled purlins from hall roofs are interconnected very complex by plugs with a special design (e.g. GEKA, Appel) and threaded bolts.
Coupled purlins can be connected rigid, fast and simple by Power-Full screws. Therefore, hall roofs can be created cheaper.
To counteract the low lateral pressure load capacity especially on coatings across to wood fibre, larger beam cross sections or the usage of hard wood is needed.
Due to the screw connection across to the course of the wood fibre, the fully threaded screw fischer Power-Full increases the lateral pressure load capacity of the wood, without enlarging the beam cross section. The material costs can be significantly reduced.
Thrust woods are fixed with partial-threaded screws. Therefore, many fixing points and thus also larger thrust woods are needed.
Stiff connections are ensured by fewer fully threaded screws fischer Power-Full, which leads to shorter thrust woods. The screws are screwed-in in an angle of approx. 45 degrees into the thrust wood, to take the occurring thrust forces in.
Many rafter- or beam heads in old buildings are defective. Mostly, either plugs with special designs have to be used or a complete dismantling has to be implemented for the beam restructuring.
The carrying beams are screwed-in simple and fast with lateral reinforcement straps, according to the application. A cost-intensive changing of damaged beams is therefore cancelled.
The walls of houses in wooden framework construction are often only produced storey-high. As the ceiling joist location bears on the wood plate of the ground floor, the facade and the insulation are not continuous. Furthermore, the risk of belated building settlement increases.
To optimise the exterior wall insulation, the walls are constructed continuously for various floors. The fixing of the coating beams can now be performed safe, displacement stiff and nearly invisible, thanks to fischer Power-Full. For an optimal load intake, the screw connections are mostly set in an angle of approx. 45 degrees.
The elements are contracted and connected with many partial-threaded screws.
With fully threaded screws, higher tension-/ pressure- and shear loads can be transmitted with fewer screws. For an optimal connection, the screw connection will be set in an angle between 30 - 90 degrees.