Concrete screw with countersunk head W-BS 2/A4 type CS

Name: Concrete screw with countersunk head W-BS 2/A4 type CS
Brand: Würth
SKU: 5931236050

Concrete screw W-BS 2 type CS A4 stainless steel
ANC-(W-BS 2/CS)-A4-TX30-5-15-6X50

Art.-no. 5931236050

EAN 4065746447829

All versions

Specification

High working loads and easy installation. The new generation of concrete screws in A4 stainless steel. For flush mounting of e.g. staircase railings or handrails in concrete

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

Proof of Performance

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

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

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

Application

Application area

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)

Technical information

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
Nominal length of thread engagement		h_nom [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 h_ef c ≥ 1.5 h_ef)	N_adm [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 h_ef c ≥ 1.5 h_ef)	N_adm [kN] = C20/25²⁾	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 h_ef)	V_adm [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 h_ef)	V_adm [kN] = C20/25²⁾	2.9	4.0	4.0	7.7	7.7	9.7	12.9	19.4	19.4
Admissible bending moment		M_adm [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
¹⁾ The partial safety factors of the resistances γ_M 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 length of thread engagement	h_nom [mm]	35¹⁾	45	55	45	55	65	55	75	85
Minimum spacing	s_min [mm]	35			35			40
Minimum edge distance	c_min [mm]	35			35			40
Minimum member thickness	h_min [mm]	80		100	80	100	120	100	130	130
Thread diameter	d_th [mm]	7.5			10			12
Nominal drill diameter	d₀ ≤ [mm]	6			8			10
Diameter of cutting edges	d_cut ≤ [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	d_f ≤ [mm]	8			12			14
Internal drive		TX30			TX40			TX50
Screw-head height	h_n [mm]	5			7			8
Head diameter	d_cs ≤ [mm]	13			20			22
Max. rated torque of tangential impact screwdriver	T_imp,max [Nm]	160			300			450
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