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TECHNICAL ASPECTS

INSTALLATION Spacing and minimum distances Minimum spacing Minimum edge distance Minimum thickness of concrete support

s c

M12

M16

M20

[mm]

68

81

115

135

[mm]

68

81

115

135

[mm]

100

120

170

200

M10

M12

M16

M20

[mm]

150

180

255

300

[mm]

250

300

425

500

[mm]

75

90

128

150

[mm]

125

150

213

250

Spacing and critical distances hmin

scr,N (3) scr,sp (4) ccr,N (3) ccr,sp (4)

Critical spacing c

smin cmin hmin

M10

s

Critical edge distance

For spacing and distances smaller than the critical ones, strength values have to be reduced depending on the installation parameters.

STATIC VALUES Valid for a single anchor in thickened C20/25 grade concrete with a thin reinforcing layer when spacing and edge-distance are not limiting parameters.

CHARACTERISTIC VALUES UNCRACKED CONCRETE TENSION (1)

SHEAR (2)

NRk,p [kN]

γMp

VRk,s [kN]

γMs

M10

12,0

1,8

14,5

1,25

M12

16,0

1,8

21,1

1,25

M16

16,0

1,8

39,3

1,25

M20

30,0

1,5

58,8

1,25

incremental factor for NRk,p (5) C30/37 ψc

1,22

C40/50

1,41

C50/60

1,55

ADMISSIBLE VALUES (recommended) UNCRACKED CONCRETE

M10

TENSION Nrec [kN] 4,8

SHEAR Vrec [kN] 8,3

M12

6,3

12,1

M16

6,3

22,5

M20

14,3

33,6

GENERAL PRINCIPLES:

- Characteristic values according to ETA-17/0237. - Design values can be obtained from characteristic values as follows: Rd = Rk /γm. Coefficients γm are listed in the table in accordance with the failure characteristics and product certificates. - Admissible values (recommended) are evaluated based on the characteristic values by applying the material safety factors γm according to ETA and a further partial factor for external actions γf = 1,4. - For the calculation of anchors with reduced spacing, or too close to the edge, please refer to ETA. Similarly, in case of fastening on concretesupports with a better-grade, limited thickness or a thick reinforcing layer please see ETA.

NOTES:

(1) Pull-out failure mode. (2) Steel failure mode. (3) Breakage characteristics for formation of concrete cone for tensile loads. (4) Splitting failure mode for tensile loads. (5) Tensile-strength increment factor (excluding steel failure).

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