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Concrete screw with countersunk head W-BS/A4

Concrete screw W-BS type SK, stainless steel A4
CONCSCR-(W-BS/SK)-A4-TX30-30-50-6X85

Art.-no. 5929236050
EAN 4046777702224

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Concrete screw with countersunk head W-BS/A4

Art.-no. 5929236050

Prices for customers after login
Quantity
PU
x 100 pcs

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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

Product information

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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

6 mm

Anchor length (l)

85 mm

Attachment height (t fix 1)

50 mm

Attachment height (t fix 2)

45 mm

Attachment height (t fix 3)

30 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)

45 mm

Drill hole depth (h 1.3)

60 mm

Embedding depth (h nom1)

35 mm

Embedding depth (h nom2)

40 mm

Embedding depth (h nom3)

55 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

Type description

W-BS A4 type SK

Anchor size [mm]6810
Admissible load when exposed to fire (R30, R60, R90, R120), see European Technical Assessment ETA-16/0043
Performance data in concrete - fixing point according to ETA-16/0043
Length of anchor in drilled holehnom [mm]4055455565557585
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)1,01,92,44,35,74,38,09,6
Compressive zone
(non-cracked concrete C20/252),
s ≥ 3 hef c ≥ 1.5 hef)
1,94,33,65,77,65,79,511,9
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)3,03,33,64,86,44,815,916,2
Compressive zone
(non-cracked concrete C20/252), c ≥ 10 hef)
3,33,35,06,88,16,816,216,2
Permissible bending moment Madm [Nm]4,812,426,7
Admissible load under seismic activity performance categories C1 and C2 see European Technical Assessment ETA-16/0043C1xx xx x
C2
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 holehnom [mm]3555
Anchors in concrete in a non-structural system based on a redundant design3)Nperm. [kN] ≥ C20/250,63.64)
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)2,03,3
Compressive zone
(non-cracked concrete C20/252), c ≥ 10 hef)
2,83,3
Permissible bending moment Madm [Nm]4,8
Admissible load when exposed to fire (R30, R60, R90, R120), see European Technical Assessment ETA-16/0128
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] 0,40,81,2
Installation parameters in concrete
Anchor size [mm]6810
Length of anchor in drilled holehnom [mm]351)4055455565557585
Minimum axis distance smin [mm]3540405050
Axis distancescr,N [mm]8193132105129156129180204
Minimum edge distancecmin [mm]3540405050
Edge distanceccr,N [mm]40,546,56652,564,57864,590102
Minimum member thicknesshmin [mm]80100100120100130
Nominal drill diameterd0 [mm]6810
Diameter of cutting edgesdcut ≤ [mm]6,408,4510,45
Drill hole depthh1 ≥ [mm]404560556575658595
Through hole in the component being connecteddf ≤ [mm]81214
Internal drive TX30TX40TX50
Head diameterdsk [mm]132022
Max. rated torque of tangential impact screwdriverTimp,max [Nm]102040
Anchor size [mm]6
Through hole in the component being connecteddf ≤ [mm]8
Installation parameters in hollow-core prestressed concrete ceilings
Minimum axis distance smin [mm]100
Minimum edge distancecmin [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 diameterd0 [mm]6
Additional accessory:
 
Product
Description
Quantity
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Price
/PU
Blow-out bulb for drill hole cleaning

BLWOUTBULB-F.CLN

For cleaning drill holes with a smaller diameter
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