Concrete screw with countersunk head W-BS 2/A4 type CS
Concrete screw W-BS 2 type CS A4 stainless steel
ANC-(W-BS 2/CS)-A4-TX30-5-15-6X50
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- The new thread geometry ensures smooth screwing into the concrete and thus greater efficiency
- The fastest type of fastening for medium and heavy loads
- Three effective anchorage depths allow flexible application
- Attachments can be adjusted up to twice retrospectively, for example to be able to align staircase railings or anchor plates (observe installation instructions)
- Minimum spacing and edge distances due to very low expansion effect
- Attractive, flush-mount installation possible
European technical assessment ETA-22/0123 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
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.
Railings
Handrails
Adjustment - subsequent aligning possible
Create 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
European technical assessment ETA-22/0123 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
Datasheets(X)
Fixing point with approval (∅6 - ∅10):
In normal weight concrete C20/25 to C50/60 (cracked and non-cracked concrete)
Specifically designed for attractive flush-mounting
Suitable for mounting medium to heavy loads in concrete:
- Attachment of e.g. staircase railings and balcony balustrades, handrails, steel constructions, wooden substructures, metal profiles etc. in in-place installation
- Mounting under seismic conditions in earthquake areas
- Mounting in areas under exposure to fire
W-BS 2/A4 (A4 stainless steel) can be used in dry indoor conditions, outdoors (including in industrial atmospheres and close to the sea) 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 | 6 mm |
Anchor length (l) | 50 mm |
Attachment height (t fix 1) | 15 mm |
Attachment height (t fix 2) | 5 mm |
Thread diameter | 7.5 mm |
Nominal drill-bit diameter (d 0) | 6 mm |
Drill hole depth (h 1.1) | 40 mm |
Drill hole depth (h 1.2) | 50 mm |
Embedding depth (h nom1) | 35 mm |
Embedding depth (h nom2) | 45 mm |
Head diameter (d sk) | 13 mm |
Internal drive | TX30 |
Head type | Countersunk head |
Material | Stainless steel A4 |
Through-hole in the component to be connected (d f) | 8 mm |
Surface | Plain |
Head diameter | 13 mm |
| Performance data in concrete - individual fixing point according to ETA-22/0123 | |||||||||||
| Anchor size [mm] | 6 | 8 | 10 | ||||||||
| Admissible bending moment | Madm [Nm] | 6.2 | 14.9 | 32.0 | |||||||
| Admissible load under seismic activity performance categories C1 and C2, see European technical assessment ETA-22/0123 | C1 | x | x | x | x | x | x | ||||
| C2 | |||||||||||
| Admissible load when exposed to fire (R30, R60, R90, R120), see European technical assessment ETA-22/0123 | |||||||||||
| Nominal length of thread engagement | hnom [mm] | 353) | 45 | 55 | 45 | 55 | 65 | 55 | 75 | 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) | Nadm [kN] = C20/252) | 1.2 | 0.7 | 1.4 | 1.4 | 2.6 | 3.8 | 2.9 | 6.2 | 8.1 |
| Compressive zone (uncracked concrete C20/252), s ≥ 3 hef c ≥ 1.5 hef) | 1.7 | 1.9 | 4.0 | 4.3 | 5.7 | 8.1 | 5.2 | 9.0 | 11.9 | ||
| Admissible shear load1) on an individual anchor without the influence of the edge distance | Tensile zone (cracked concrete C20/252), c ≥ 10 hef) | Vadm [kN] = C20/252) | 2.0 | 4.0 | 4.0 | 6.2 | 7.7 | 9.7 | 10.4 | 17.6 | 19.4 |
| Compressive zone (uncracked concrete C20/252), c ≥ 10 hef) | 2.9 | 4.0 | 4.0 | 7.7 | 7.7 | 9.7 | 12.9 | 19.4 | 19.4 | ||
| 1) The partial safety factors of the resistances γM regulated in the approval/assessment and a partial safety factor of the actions of γF = 1.4 have been taken into account. Please refer to the appropriate guidelines, e.g. DIN EN 1992-4, for information on combining tensile and shear loads, the influence of the edge distance and groups of anchors 2) The concrete has normal reinforcement. Higher values are possible for higher concrete compressive strengths 3) Only statically indeterminate non-load-bearing systems (anchors in a redundant non-structural system) according to EN 1992-4, only in dry indoor conditions | |||||||||||
| Installation parameters in concrete | ||||||||||
| Anchor size [mm] | 6 | 8 | 10 | |||||||
| Nominal drill diameter | d0 ≤ [mm] | 6 | 8 | 10 | ||||||
| Diameter of cutting edges | dcut ≤ [mm] | 6.40 | 8.45 | 10.45 | ||||||
| Drill hole depth | h0 ≥ [mm] | 40 | 50 | 60 | 55 | 65 | 75 | 65 | 85 | 95 |
| Through hole in the component being connected | df ≤ [mm] | 8 | 12 | 14 | ||||||
| Internal drive | TX30 | TX40 | TX50 | |||||||
| Screw-head height | hn [mm] | 5 | 7 | 8 | ||||||
| Head diameter | dcs ≤ [mm] | 13 | 20 | 22 | ||||||
| Max. rated torque of tangential impact screwdriver | Timp,max [Nm] | 160 | 300 | 450 | ||||||
| Nominal length of thread engagement | hnom [mm] | 351) | 45 | 55 | 45 | 55 | 65 | 55 | 75 | 85 |
| Minimum spacing | smin [mm] | 35 | 35 | 40 | ||||||
| Minimum edge distance | cmin [mm] | 35 | 35 | 40 | ||||||
| Minimum member thickness | hmin [mm] | 80 | 100 | 80 | 100 | 120 | 100 | 130 | 130 | |
| Thread diameter | dth [mm] | 7.5 | 10 | 12 | ||||||
| 1) Only statically indeterminate non-load-bearing systems (anchors in a redundant non-structural system) according to EN 1992-4 and only in dry indoor conditions | ||||||||||
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