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Concrete screw, stud screw W-BS/A4
Concrete screw, stud screw W-BS/A4 - 1
Concrete screw, stud screw W-BS/A4 - 2
Concrete screw, stud screw W-BS/A4 - 3

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Concrete screw, stud screw W-BS/A4

With connecting thread. Highest load capacities and efficient mounting. Ideal for mounting attachment parts outdoors in concrete that need to be removable, A4 stainless steel

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  • Extremely flexible to use due to three anchoring depths

  • Very high loads

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

  • Very fast and simple assembly, immediately load-bearing and easy to dismantle

  • Pre-positioned, push-through or stand-off installation possible

  • Attachment can be adjusted up to two times after assembly
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 (∅8 - ∅10)

  • Seismic effect, performance category C1 (∅8 - ∅10)

  • 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 ST stair bolt)


  • 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, (∅8 - ∅10) - expert report no. 21641 - 2016