Concrete screw with hexagon head W-BS/A4
Concrete screw W-BS type S, A4 stainless steel
ANC-(W-BS/S)-A4-WS13-15-35-8X80
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- Extremely flexible to use due to three anchorage depths
- Fastening can be adjusted up to twice after installation, for example in order to align railings or anchor plates (please refer to the assembly guide)
- Very high loads
- Smallest spacing and edge distance thanks to very low expansion effect
- Very fast and easy assembly and immediately load-bearing
European Technical Assessment ETA-16/0043 for individual fixing point, option 1, cracked and uncracked 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 multiple anchors in a redundant non-structural system:
- Cracked and uncracked 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 injection mortar WIT-BS as bonded screw anchor WIT-BS
- In reinforced and non-reinforced and cracked and uncracked 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 - expert report no. 2101/173/18 - 2018
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.
Steel supports
Brackets
Adjustment - subsequent aligning possible.
Create the drill hole
Clean the drill hole
Place screw
Screw in the screw
Considered installed when the head is close fitting
Screw out the screw max. 2x each by max. 10 mm. Underlay. Screw in
Considered installed when the head is close fitting. Lining max. 10 mm. The required embedment depth must be maintained as a minimum
Locate the tensioning strand
Mark the tensioning strand and locate the next one
Mark the tensioning strands. Specify the drilling range
Create the drill hole. Observe spacing
Clean the drill hole
Screw in the screw
Considered installed when the head is close fitting. Observe the embedment depth/mirror thickness
European Technical Assessment ETA-16/0043 for individual fixing point, option 1, cracked and uncracked 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 multiple anchors in a redundant non-structural system:
- Cracked and uncracked 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 injection mortar WIT-BS as bonded screw anchor WIT-BS
- In reinforced and non-reinforced and cracked and uncracked 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 - expert report no. 2101/173/18 - 2018
Datasheets(X)
CAD data (available after login)
Individual fixing point with approval (∅6 - ∅10):
In normal weight concrete C20/25 to C50/60 (cracked and uncracked concrete)
Multiple anchors in a redundant non-structural system, with approval:
- In normal weight concrete C20/25 to C50/60 (cracked and uncracked concrete), (∅6)
- In hollow-core prestressed concrete ceilings C30/37 - C50/60, (∅6)
Suitable for fastening medium to heavy loads in concrete:
- Mounting of e.g. railings, base plates, supports, metal structures, metal profiles, brackets, etc. in in-place installation
- Fastenings under seismic conditions in earthquake areas
- Fastenings under exposure to fire
W-BS/A4 (stainless steel A4) can be used in dry indoor conditions, outdoors (including in industrial atmospheres and coastal areas) or in wet rooms, provided that no particularly aggressive conditions are present
For use in concrete < C20/25 and pressure-resistant natural stone (without approval)
Anchor size | 8 mm |
Anchor length (l) | 80 mm |
Attachment height (t fix 1) | 35 mm |
Attachment height (t fix 2) | 25 mm |
Attachment height (t fix 3) | 15 mm |
Thread diameter | 10 mm |
Nominal drill-bit diameter (d 0) | 8.0 mm |
Drill hole depth (h 1.1) | 55 mm |
Drill hole depth (h 1.2) | 65 mm |
Drill hole depth (h 1.3) | 75 mm |
Embedding depth (h nom1) | 45 mm |
Embedding depth (h nom2) | 55 mm |
Embedding depth (h nom3) | 65 mm |
External drive | WS13 |
Material | Stainless steel A4 |
Surface | Plain |
Washer diameter | 16 mm |
Through-hole in the component to be connected (d f) | 12.0 mm |
Head type | Hexagon head |
Type description | W-BS A4 type S |
| Anchor size [mm] | 6 | |
| Minimum axis distance | smin [mm] | 100 |
| Minimum edge distance | cmin [mm] | 100 |
| Minimum spacing between the groups of anchors | amin [mm] | 100 |
| Spacing between cavity axes | lc ≥ [mm] | 100 |
| Spacing between tensioning strands | lp ≥ [mm] | 100 |
| Spacing between tensioning strands and drilled hole | ap ≥ [mm] | 50 |
| Nominal drill diameter | d0 [mm] | 6 |
| Through hole in the component being connected | df ≤ [mm] | 8 |
| Anchor size [mm] | 6 | 8 | 10 | |||||||
| Nominal length of thread engagement | hnom [mm] | 351) | 40 | 55 | 45 | 55 | 65 | 55 | 75 | 85 |
| Minimum axis distance | smin [mm] | 35 | 40 | 40 | 50 | 50 | ||||
| Axis distance | scr,N [mm] | 81 | 93 | 132 | 105 | 129 | 156 | 129 | 180 | 204 |
| Minimum edge distance | cmin [mm] | 35 | 40 | 40 | 50 | 50 | ||||
| Edge distance | ccr,N [mm] | 40,5 | 46,5 | 66 | 52,5 | 64,5 | 78 | 64,5 | 90 | 102 |
| Minimum member thickness | hmin [mm] | 80 | 80 | 80 | 90 | 102 | ||||
| Nominal drill diameter | d0 [mm] | 6 | 8 | 10 | ||||||
| Diameter of cutting edges | dcut ≤ [mm] | 6,40 | 8,45 | 10,45 | ||||||
| Drill hole depth | h1 ≥ [mm] | 40 | 45 | 60 | 55 | 65 | 75 | 65 | 85 | 95 |
| Through hole in the component being connected | df ≤ [mm] | 8 | 12 | 14 | ||||||
| Width across flats | [mm] | WS13 | WS13 | WS15 | ||||||
| Washer diameter | dw [mm] | 15 | 16 | 20 | ||||||
| Screw-head height | hn [mm] | 6 | 9 | 10 | ||||||
| Max. rated torque of tangential impact screwdriver | Timp,max [Nm] | 160 | 300 | 400 | ||||||
| 1) For anchors in a redundant non-structural system according to ETA-16/0128 | ||||||||||
| Nominal length of thread engagement | 85 | ||||||
| Admissible centric tension load1) on an individual anchor without the influence of the edge distance | Tensile zone (cracked concrete C20/252), s ≥ 3 hef c ≥ 1.5 hef) | 9,6 | |||||
| Compressive zone (non-cracked concrete C20/252), s ≥ 3 hef c ≥ 1.5 hef) | 11,9 | ||||||
| Admissible shear load1) on an individual anchor without the influence of the edge distance | Tensile zone (cracked concrete C20/252), s ≥ 10 hef) | 16,2 | |||||
| Compressive zone (non-cracked concrete C20/252), c ≥ 10 hef) | 16,2 | ||||||
| Admissible load under seismic activity performance categories C1 and C2 see European Technical Assessment ETA-16/0043 | C1 | x | x | x | x | x | |
| C2 | |||||||
| Admissible load when exposed to fire (R30, R60, R90, R120), see European Technical Assessment ETA-16/0043 | |||||||
| Anchor size [mm] | 6 | |||
| Mirror thickness [mm] | ≥ 25 | ≥ 30 | ≥ 35 | |
| Anchors in a redundant non-structural system in hollow-core prestressed concrete ceilings5) | Fperm. [kN] | |||
| 1) The partial safety factors of the resistances yM regulated in the evaluation/approval and a partial safety factor of the effects of γF = 1.4 have been taken into account. For a combination of tensile and shear loads, for the influence of the edge distance and anchor groups please see the appropriate guidelines e.g. DIN EN 1992-4. 2) The concrete has normal reinforcement. Higher values are possible for higher concrete strengths. 3) The admissible loads were determined without axial influence and the influence of the edge distance. 4) Number of attachment points ≥ 3 and at least one anchor per attachment point produces a load per attachment point of Fperm ≤ 1.4 kN or number of attachment points ≥ 4 and at least one anchor per attachment point produces a load per attachment point of F≤perm 2.1 kN. The admissible loads can be increased if the design shows that the requirements governing the strength and rigidity of the component to be attached remain satisfied even after the failure of an anchor in terms of the limit state of serviceability and load-bearing capacity. 5) The assembly data must be observed. | ||||
| Nominal length of thread engagement | hnom [mm] | ||
| Anchors in concrete in a non-structural system based on a redundant design3) | Nperm. [kN] ≥ C20/25 | ||
| Admissible shear load1) on an individual anchor without the influence of the edge distance | Tensile zone (cracked concrete C20/252), c ≥ 10 hef) | Vperm. [kN] = C20/252) | |
| Compressive zone (non-cracked concrete C20/252), c ≥ 10 hef) | |||
| Permissible bending moment | Madm [Nm] | ||
| Admissible load when exposed to fire (R30, R60, R90, R120), see European Technical Assessment ETA-16/0128 | |||