Wood is more popular than ever, whether in prefabricated houses or multistorey buildings. It’s no wonder, as it’s a natural product with many advantages. The renewable resource is climate neutral and offers excellent physical properties, a high degree of prefabrication, excellent insulating properties, a healthy indoor climate, a unique look and is quick to process. Wood can be processed safely, quickly and flexibly with fischer’s PowerFast II and PowerFull II wood construction screws.
Wood screws by fischer are an efficient and cost-effective alternative to conventional fastenings in structural timber construction and feature a European Technical Assessment (ETA).
Quick and flexible connections in wood construction
fischer’s new PowerFast II wood construction screw enables many different designs. With its partial thread, the screw firmly expands or pulls wood components together. Applications include wood on wood and metal on wood connections. In addition to the types of solid wood, wood materials and veneer specified in the ETA, the PowerFast II screw is also suitable for applications in fischer plugs with load values recommended by fischer. Its many different head types provide added flexibility, with available options including stepped countersunk, countersunk, disc heads and a hexagon head with a pressed-on washer. The innovative stepped countersunk head can be fully inserted into the wood, allowing fixtures to be screwed in flush and wood structures to be added as superstructures. Depending on the version, users can implement mullion-transom or rafter-purlin connections, fasten metal rails to wood substructures and much more. Possible applications include rooftop insulation, facades, roof trusses and carports. The ETA provides added safety. With its three ribs, the screw tip ensures a quick bite while simultaneously providing a pre-drilling function. This makes it easier to place the screw and significantly reduces its splitting behaviour in the material. The higher thread pitch reduces the time it takes to insert the screw. As a result, users successfully complete their projects quicker and more cost-effectively. A combination of redesigned shaft ribs and the perfectly coordinated core milling thread geometry reduces the screw-in torque, saving time and effort during installation. The high-performance wax coating additionally reduces the screw-in torque, ensuring a longer battery life with smooth and even insertion.
The innovative and patented core-milling geometry provides precise positioning and finish milling while the wood dust is conveniently removed. Thanks to this feature, the PowerFast II screw can also be used in low edge and axial spacing, enabling even more wood designs. A tangential impact screwdriver can be used to insert the wood construction screw, making installation even more convenient. Depending on the version, the new PowerFast II screw is available in diameters of 8 to 12.
Cost-effective connections for load-bearing wood structures
fischer’s PowerFull II premium full thread screw with diameters of 6 to 10 mm is ideal for wood on wood and sheet steel on wood connections. In addition to conventional softwoods, the wood construction screw is also suitable for use in solid woods. Thanks to its optimised head and thread geometry, the latest PowerFull II generation is ideal for processing while ensuring maximum force transmission, ensuring installation requires little effort and battery power. Its unique countersunk head with mill pockets below the head is ideal for fastening metal components to wood, preventing fixtures from being damaged by reaming. A version with a cylinder head also features mill pockets that allow the screw to be neatly sunk into the fastening substrate.
The 10-mm screw variants have a drill tip that creates a pre-drilling effect without causing the long screws to slip, reducing the risk of splitting the wood and lowering the turning torque. This also enables low edge and axial spacing.
