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Concrete screw with countersunk head W-BS/A4
Concrete screw with countersunk head W-BS/A4 - 1
Concrete screw with countersunk head W-BS/A4 - 2
Concrete screw with countersunk head W-BS/A4 - 3
Concrete screw with countersunk head W-BS/A4 - 4
Concrete screw with countersunk head W-BS/A4 - 5

For detailed information, other images and documents, please select individual articles from the following table.

Concrete screw with countersunk head W-BS/A4

Highest load capacities and efficient mounting. For flush mounting of e.g. railings or handrails in concrete, A4 stainless steel

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Available in 6 versions

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  • Extremely flexible to use due to three anchoring depths (size 6-10)

  • Fastening can be adjusted up to twice after installation (size 6-10), for example in order to align railings or anchor plates (please refer to the assembly guide)

  • Very high loads

  • Smallest axial and edge clearance due to very low expansion effect

  • Very fast and easy assembly and immediately load-bearing

  • Attractive, flush-mount installation possible
Notice

From size 8, we recommend the use of a suitable tangential impact screwdriver for installation. The recommended nominal torque must be observed. When used outdoors, the drill hole can be sealed with WIT-BS injectable mortar.

European Technical Assessment ETA-16/0043 for fixing point, option 1, cracked and non-cracked concrete:


  • Static and quasi-static effects (∅6 - ∅10)

  • Seismic effect, performance category C1 (∅6 - ∅10)

  • Fire resistance R30, R60, R90, R120


European Technical Assessment ETA-16/0128 for anchors in a redundant non-structural system:


  • Cracked and non-cracked concrete, (∅6)

  • Hollow-core prestressed concrete ceilings C30/37 - C50/60, (∅6)

  • Fire resistance R30, R60, R90, R120


DIBt National technical approval/general type approval Z-21.1-2075 as bonded screw anchor for anchoring in concrete (∅10, type S hexagon head)


  • Use in combination with injectable mortar WIT-BS as bonded screw anchor WIT-BS

  • In reinforced and non-reinforced and cracked and non-cracked concrete C20/25 to C50/60


Tensile capacity in concrete hollow body ceilings, (∅6 - ∅10) - expert report no. 21641 - 2016



Fire resistance rating when exposed to fire according to the uniform temperature time curve in masonry (Mz, KSL, KS), and reinforced concrete, (∅6) - expert report no. 2101/173/18 - 2018