Concrete screw with pan head W-BS/A4
Concrete screw W-BS A4 type P, stainless steel A4
CONCSCR-(W-BS/P)-A4-TX30-10-15-6X50
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- Extremely flexible to use due to three anchoring depths
- Fastening can be adjusted up to twice after installation, for example in order to align anchor plates or rails (please refer to the assembly guide)
- High loads
- Smallest axial and edge clearance due to very low expansion effect
- Very fast and easy assembly and immediately load-bearing
European Technical Assessment ETA-16/0043 for fixing point, option 1, cracked and non-cracked concrete:
- Static and quasi-static effects (∅6)
- Seismic effect, performance category C1 (∅6)
- 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
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
When installing with a tangential impact screwdriver, the recommended maximum rated torque must be observed. When used outdoors, the drill hole can be sealed with WIT-BS injectable mortar.
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 fixing point, option 1, cracked and non-cracked concrete:
- Static and quasi-static effects (∅6)
- Seismic effect, performance category C1 (∅6)
- 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
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
Datasheets(X)
CAD data (available after login)
Fixing point with approval (∅6):
In normal weight concrete C20/25 to C50/60 (cracked and non-cracked concrete)
Anchors in a redundant non-structural system with approval:
- In normal weight concrete C20/25 to C50/60 (cracked and non-cracked concrete), (∅6)
- In hollow-core prestressed concrete ceilings C30/37 - C50/60, (∅6)
Pan head with attractive head geometry, ideally suited for fastening medium loads in concrete:
- Fastening of e.g. mounting rails, panels, sheets, fire protection panels, handrails, metal profiles, brackets, wooden substructures etc. in in-place installation
- Fastenings under seismic conditions in earthquake areas
- Fastenings under exposure to fire
For use in concrete < C20/25 and pressure-resistant natural stone (without approval)
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
Anchor size | 6 mm |
Anchor length (l) | 50 mm |
Attachment height (t fix 1) | 15 mm |
Attachment height (t fix 2) | 10 mm |
Thread diameter | 7.5 mm |
Nominal drill-bit diameter (d 0) | 6.0 mm |
Drill hole depth (h 1.1) | 40 mm |
Drill hole depth (h 1.2) | 45 mm |
Embedding depth (h nom1) | 35 mm |
Embedding depth (h nom2) | 40 mm |
Internal drive | TX30 |
Material | Stainless steel A4 |
Surface | Plain |
Head diameter | 15 mm |
Through-hole in the component to be connected (d f) | 8.0 mm |
Head type | Pan head |
Type description | W-BS A4 type P |
| 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 | |||
| Nominal length of thread engagement | hnom [mm] | 351) | 40 | 55 |
| Minimum axis distance | smin [mm] | 35 | 40 | |
| Axis distance | scr,N [mm] | 81 | 93 | 132 |
| Minimum edge distance | cmin [mm] | 35 | 40 | |
| Edge distance | ccr,N [mm] | 40,5 | 46,5 | 66 |
| Minimum member thickness | hmin [mm] | 80 | ||
| Nominal drill diameter | d0 [mm] | 6 | ||
| Diameter of cutting edges | dcut ≤ [mm] | 6,40 | ||
| Drill hole depth | h1 ≥ [mm] | 40 | 45 | 60 |
| Through hole in the component being connected | df ≤ [mm] | 8 | ||
| Internal drive | TX30 | |||
| Head diameter | dh [mm] | 15 | ||
| Screw-head height | hh [mm] | 3,5 | ||
| Max. rated torque of tangential impact screwdriver | Timp,max [Nm] | 160 | ||
| 1) For anchors in a redundant non-structural system | ||||
| Anchor diameter [mm] | 6 | |||
| Nominal length of thread engagement | hnom [mm] | 40 | 55 | |
| 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) | Nperm. [kN] = C20/252) | 1,0 | 1,9 |
| Compressive zone (non-cracked concrete C20/252), s ≥ 3 hef c ≥ 1.5 hef) | 1,9 | 4,3 | ||
| 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) | 3,0 | 3,3 |
| Compressive zone (cracked concrete C20/252), c ≥ 10 hef) | 3,3 | 3,3 | ||
| Permissible bending moment | Madm [Nm] | 4,8 | ||
| Admissible load under seismic activity performance categories C1 and C2 see European Technical Assessment ETA-16/0043 | C1 | 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] | 0,4 | 0,8 | 1,2 |
| 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 Fperm≤ 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. | ||||
| Anchors in concrete in a non-structural system based on a redundant design3) | Nperm. [kN] ≥ C20/25 | 0,6 | 3.64) | |
| 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) | 2,0 | 3,3 |
| Compressive zone (non-cracked concrete C20/252), c ≥ 10 hef) | 2,8 | 3,3 | ||
| Permissible bending moment | Madm [Nm] | 4,8 | ||
| Admissible load when exposed to fire (R30, R60, R90, R120), see European Technical Assessment ETA-16/0128 | ||||
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