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Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80
Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 - 1
Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 - 2
Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 - 3
Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 - 4
Concrete screw with countersunk head W-BS/A4 - CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80 - 5

Concrete screw with countersunk head W-BS/A4

Concrete screw W-BS type SK, stainless steel A4
CONCSCR-(W-BS/SK)-A4-TX40-15-35-8X80

Art.-no. 5929238035
EAN 4046777702248
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Highest load capacities and efficient mounting. For flush mounting of e.g. railings or handrails in concrete, A4 stainless steel
  • 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
Proof of Performance

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

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.

Application area

Railings

Handrails

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 - ∅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

Application area

Fixing point with approval (∅6 - ∅10):


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)


Specifically designed for surface-flush, visually appealing mounting



Suitable for fastening 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

  • 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

Head diameter (d sk)

20 mm

Internal drive

TX40

Head type

Countersunk head

Material

Stainless steel A4

Through-hole in the component to be connected (d f)

12.0 mm

Surface

Plain

Type description

W-BS A4 type SK

Installation parameters in hollow-core prestressed concrete ceilings
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
Installation parameters in concrete
Anchor size [mm] 6 8 10
Length of anchor in drilled hole 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] 80 100 100 120 100 130
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
Internal drive TX30 TX40 TX50
Head diameter dsk [mm] 13 20 22
Max. rated torque of tangential impact screwdriver Timp,max [Nm] 10 20 40
1) For anchors in a redundant non-structural system
Performance data in concrete - fixing point according to ETA-16/0043
Anchor size [mm] 6 8 10
Length of anchor in drilled hole hnom [mm] 40 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) 		Nperm. [kN] = C20/252) 1,0 1,9 2,4 4,3 5,7 4,3 8,0 9,6
Compressive zone
(non-cracked concrete C20/252),
s ≥ 3 hef c ≥ 1.5 hef) 		1,9 4,3 3,6 5,7 7,6 5,7 9,5 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) 		Vperm. [kN] = C20/252) 3,0 3,3 3,6 4,8 6,4 4,8 15,9 16,2
Compressive zone
(non-cracked concrete C20/252), c ≥ 10 hef) 		3,3 3,3 5,0 6,8 8,1 6,8 16,2 16,2
Permissible bending moment Madm [Nm] 4,8 12,4 26,7
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
Performance data for hollow-core pre-stressed concrete ceilings - multiple attachment
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 γM 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.
Performance data in concrete - anchors in a redundant non-structural system according to ETA-16/0128
Anchor size [mm] 6
Length of anchor in drilled hole hnom [mm] 35 55
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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