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ASSY®plus VG 4 CH construction screw Zinc plated steel, full thread, cheese head, shank painted white
Special full-thread screw with small cheese head for high-load-bearing wood-to-wood connections or reinforcements in structural timber construction, which also require small edge and screw clearances, in indoor dry or humid areas
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RW recess ensures optimal power transmission
- Larger contact surface at the bit offers increased power
- More stability, one-handed working and precise positioning due to the tight-fit recess and perfect fit of the bit
- Fewer bit changes, one bit for multiple screw diameters
- Compatibility with previous AW recess
Unobtrusive fastening of wooden components
- Small head diameter for unobtrusive fastening
- Minimal splitting when countersinking the screw head
Highest power transmission in the tensile and compressive direction
- Symmetrical high-performance thread matched to the pre-drilling performance of the drill tip
- For high load-bearing wood-to-wood connections regardless of the load direction
Compact screw connections and small material cross-sections due to effective drill tip
- Very small permissible edge distances, e.g. 3xd, making ASSY screws of diameter 8 mm usable for beam widths of 60 mm
- No pre-drilling required
- The wood does not split and rupture
- Little run-off of long screws
High strength values and ductility
- Precise heat treatment guarantees high strength values and high ductility
- We recommend using the Würth software or corresponding design aids for planning and designing your installation. Dimensioning of ASSY screws can be carried out in the Würth timber construction software from a screw dia. of 5 mm
- Do not use the screw in applications with direct exposure to weathering or in humid rooms with atmospheres containing chlorine gas
- ASSY 4, ASSYplus 4 and ASSYplus 4 VG chipboard screws are optimised for use in wood and engineered wood. For applications in plastic anchors where a reduction in the admissible load may occur, only use screws without an optimised thread tip (tip with milling ribs, drill tip, self-clearing groove etc.), such as the ASSY D screws with countersunk head or pan head
Approved according to ETA-11/0190, for wood-concrete composite ceilings ETA-13/0029
The requirements of the European Technical Approval (ETA) must be observed
For connections with high tensile or compressive pull-out loads and exposed wood-to-wood connections in structural timber construction
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For applications in utilisation class 1 and utilisation class 2 (from dia. > 4 mm)
- High-quality, chromium(VI)-free, blue passivated, zinc surface protection, 8 µm layer thickness
- Suitable for use in utilisation class 1 (indoor areas) and from dia. > 4 mm in utilisation class 2 (wet areas or covered outdoor areas) in accordance with EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08
- The requirement of classification T2/C2 is fulfilled in accordance with prEN 14592:2017 (D)
- ASSY screws are approved for quasi-static loads
- For optimal use of the screw, use the RW bit that fits exactly
- In the case of transverse compression reinforcements, a pressure distribution plate must be inserted between the support bearing and the screw heads for even force transfer. The screw head must be flush with the pressure distribution plate. Full-thread screws with countersunk head are preferable. The steel plate thickness must be dimensioned in such a way that a uniform load distribution on the screws is guaranteed
- For the reinforcement of wooden components at a right angle to the fibre under effect of tensile action, at least 2 screws must be used. If the length of thread engagement is at least 20 x d above and below the crack-prone area, with d being the outer thread diameter of the screw, only one screw may be used
- Full-thread screws are suitable for reinforcing and creating high load-bearing connections between two components. When connecting two components, these should be connected without leaving a gap
- For long screws arranged in a cross shape or in a screw block with narrow edge distances, it is advisable to drill pilot holes or use a screw-in aid to avoid contact with screws
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