TECHNICAL GUIDE

MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Through-bolt expansion anchor with controlled torque,

for use in cracked and non cracked concrete MTP-X
ETA Assessed Option 1. Zinc-plated shaft. Sherardized clip.

PRODUCT INFORMATION
DESCRIPTION CHARACTERISTICS AND BENEFITS
Metallic anchor, with male thread, expansion • Easy installation.
by controlled torque.
• Use in cracked and non-cracked concrete.
OFFICIAL DOCUMENTATION • Use for medium-heavy duty loads.
• AVCP-1219-CPR-0053. • Pre-Installation, or through the drill-hole of the fixture.
• ETA 12/0397 option 1. • Variety of lengths and diameters: flexibility in assembly.
• Declaration of Performance DoP MTP-X.
• For static and quasi-static loads.
SIZES • Length mark on top of shaft for easy inspection and
M8x50 to M20x200. quality control.
• Available in INDEXcal.
DESIGN LOAD RANGE
From 5,00 to 33,3 kN (non-cracked). MATERIALES
From 3,3 to 20,0 kN (cracked). Shaft: Carbon steel, zinc plated ≥ 5 μm.
Washer: DIN 125 or DIN 9021, zinc plated ≥ 5 μm.
BASE MATERIAL Nut: DIN 934, zinc plated ≥ 5 μm.
Concrete class from C20/25 to C50/60
cracked or non-cracked. Clip: Carbon steel , sherardized ≥ 40 μm.

APPLICATIONS
Stone Concrete Reinforced Concrete Cracked concrete • Anchor plates.
• Metallic structures.
ASSESSMENTS • Bridges.
• Option 1 (Cracked or non-cracked concrete). • Urban fitments.
• Fire Resistance R30-120.
• Protective fences.
• Catenaries.
• Elevators.
• Pipe supports.
12
Técnicas Expansivas S.L.
Segador 13. Logroño. Spain
ETA 12/0397
1219
Structural fixings in concrete

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MECHANICAL PROPERTIES
M8 M10 M12 M16 M20

Cone area section

As (mm2) Cone area section 22,9 41,8 55,4 103,9 176,7

fu,s (N/mm2) Chracteristic tension resistance 790 750 730 700 660

fy,s (N/mm2) Yield strength 632 600 585 560 530

Threaded area section

As (mm2) Cone area section 36,6 58,0 84,3 157,0 245,0

fu,s (N/mm2) Chracteristic tension resistance 600 600 600 600 600

fy,s (N/mm2) Yield Strength 480 480 480 480 480

INSTALLATION DATA
SIZE M8 M10 M12 M16 M20

Code APX08XXX APX10XXX APX12XXX APX16XXX APX20XXX

d0 Nominal diameter of drill bit [mm] 8 10 12 16 20
Tins Installation torque moment [Nm] 15 40 60 100 200
df≤ Diameter of clearance hole in the fixture [mm] 9 12 14 18 22
h1 Minimum drill hole depth [mm] 60 75 85 105 125
hnom Installation depth [mm] 55 68 80 97 114
hef Effective embedment depth [mm] 48 60 70 85 100
hmin Minimum base material thickness [mm] 100 120 140 170 200
tfix Maximum thickness of fixture [mm] L - 66 L - 80 L - 96 L - 117 L-138
scr,N Critical spacing [mm] 144 180 210 255 300
ccr,N Critical edge distance [mm] 72 90 105 128 150
scr,sp Critical distance (splitting) [mm] 288 300 350 510 600
ccr,sp Critical edge distance (splitting) [mm] 144 150 175 255 300
smin Minimum spacing [mm] 50 60 70 128 150
cmin Minimum edge distance [mm] 50 60 70 128 150
SW Installation wrench 13 17 19 24 30

*L = Total anchor length

Tinst

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

MTP-X
Code INSTALLATION PRODUCTS INSTALLATION
Hammer drill
BHDSXXXXX Concrete Drill bits
MOBOMBA Blow pump 1 2

MORCEPKIT Cleaning Brush

DOMTAXX Installation hammering tool
Torque wrench
3 4
Hexagonal socket

Resistances in C20/25 concrete for an isolated anchor, without effects of edge distance
or spacing
Characteristic Resistance NRk and VRk
TENSION SHEAR

Size M8 M10 M12 M16 M20 Size M8 M10 M12 M16 M20

NRk Non-cracked concrete [kN] 9,0 16,0 25,0 35,0 50,0 VRk Non-cracked concrete [kN] 11,0 17,4 25,3 47,1 73,1

NRk Cracked concrete [kN] 6,0 9,0 16,0 25,0 30,0 VRk Cracked concrete [kN] 11,0 17,4 25,3 47,1 73,1

Design Resistance NRd and VRd

TENSION SHEAR

Size M8 M10 M12 M16 M20 Size M8 M10 M12 M16 M20

NRd Non-cracked concrete [kN] 5,0 10,7 16,7 23,3 33,3 VRd Non-cracked concrete [kN] 8,8 13,9 20,2 37,7 58,5

NRd Cracked concrete [kN] 3,3 6,0 10,7 16,7 20,0 VRd Cracked concrete [kN] 8,8 13,9 20,2 37,7 58,5

Maximum Loads Recommended Nrec and Vrec

TENSION SHEAR

Size M8 M10 M12 M16 M20 Size M8 M10 M12 M16 M20

Nrec Non-cracked concrete [kN] 3,6 7,6 11,9 16,7 23,8 Vrec Non-cracked concrete [kN] 6,3 9,9 14,5 26,9 41,8

Nrec Cracked concrete [kN] 2,4 4,3 7,6 11,9 14,3 Vrec Cracked concrete [kN] 6,3 9,9 14,5 26,9 41,8

Simplified calculation method

European Technical Assessment ETA 12/0397

Simplified version of the calculation method according to The calculation method is based on the following simplification:
ETAG 001, annex C. Resistance is calculated according to Different loads do not act on individual anchors, without
the data shown in assessment ETA 12/0397. eccentricity.
INDEXcal
• Influence of concrete strength.
For a more accurate calculation and to take more
• Influence of edge distance.
constructive provisions into account, we recommend
• Influence of spacing between anchors.
using our calculation program INDEXcal. It may be
• Influence of reinforcements.
easily downloaded from our website www.indexfix.
• Influence of base material thickness.
com
• Influence of load application angle.
• Valid for a group of two anchors.

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X
TENSION LOADS
• Steel design resistance: NRd,s
• Pull-out design resistance: NRd,p = NºRd,p • c
• Concrete cone design resistance: NRd,c = NºRd,c • b
•
s,N
•
c,N
•
re,N
• Concrete splitting design resistance: NRd,sp = NºRd,c • b
•
s,sp
•
c,sp
•
re,N
•
h,sp

Steel Design resistance N

NRd,s
Size M8 M10 M12 M16 M20

NºRd [kN] 12,1 20,9 26,9 48,5 77,7

Pull-out design resistance N

NRd,p = NºRd,p • c

Size M8 M10 M12 M16 M20

NºRd,p Non-cracked concrete [kN] 5,0 10,7 16,7 23,3 33,3

NºRd,p Cracked concrete [kN] 3,3 6,0 10,7 16,7 20,0

Concrete cone design resistance N

NRd,c = NºRd,c • b
•
s,N
•
c,N
•
re,N

Concrete splitting design resistance*

NRd,sp = NºRd,c • b
•
s,sp
•
c,sp
•
re,N
•
h,sp

Size M8 M10 M12 M16 M20

NºRd,c Non-cracked concrete [kN] 9,3 15,6 19,7 26,4 33,7 N

NºRd,c Cracked concrete [kN] 6,7 11,2 14,1 18,8 24,0

*Concrete splitting design resistance must only be considered for non-cracked concrete.

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Coefficients of influence
MTP-X
Influence of concrete strength resistance in pul-out failure c

M8 M10 M12 M16 M20

C 20/25 1,00 1,00 1,00 1,00 1,00

C 30/37 1,22 1,16 1,22 1,22 1,16

c
C 40/50 1,41 1,31 1,41 1,41 1,31

C 50/60 1,55 1,41 1,55 1,55 1,41

Influence of concrete strength in concret cone and splitting failure b

M8 M10 M12 M16 M20

C 20/25 1,00

C 30/37 1,22
b
C 40/50 1,41
= fck,cube >
_1
b
C 50/60 1,55 25

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X Influence of spacing (concrete cone)

MTP-X
s,N

s [mm]
M8 M10 M12 M16 M20

N 50 0,67
55 0,69
60 0,71 0,67 Invalid value
65 0,73 0,68
70 0,74 0,69 0,67
80 0,78 0,72 0,69
S
85 0,80 0,74 0,70
s 90 0,81 0,75 0,71
s,N
= 0,5 + _1
<
2 • Scr,N 100 0,85 0,78 0,74
105 0,86 0,79 0,75
110 0,88 0,81 0,76
120 0,92 0,83 0,79
125 0,93 0,85 0,80
126 0,94 0,85 0,80
128 0,94 0,86 0,80 0,75
130 0,95 0,86 0,81 0,75
135 0,97 0,88 0,82 0,76
144 1,00 0,90 0,84 0,78
150 0,92 0,86 0,79 0,75
165 0,96 0,89 0,82 0,78
170 0,97 0,90 0,83 0,78
180 1,00 0,93 0,85 0,80
195 0,96 0,88 0,83
200 0,98 0,89 0,83
210 1,00 0,91 0,85
220 0,93 0,87
225 0,94 0,88
252 0,99 0,92
255 Value without reduction = 1 1,00 0,93
260 0,93
300 1,00

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Influence of spacing (concrete splitting)

MTP-X
s,sp
MTP-X
s [mm]
M8 M10 M12 M16 M20
50 0,59 N
55 0,60
60 0,60 0,60 Invalid value
65 0,61 0,61
70 0,62 0,62 0,60
80 0,64 0,63 0,61
S
85 0,65 0,64 0,62
90 0,66 0,65 0,63 s
s,sp
= 0,5 + _1
<
100 0,67 0,67 0,64 2 • Scr,sp
110 0,69 0,68 0,66
125 0,72 0,71 0,68
128 0,72 0,71 0,68 0,63
135 0,73 0,73 0,69 0,63
140 0,74 0,73 0,70 0,64
150 0,76 0,75 0,71 0,65 0,63
160 0,78 0,77 0,73 0,66 0,63
165 0,79 0,78 0,74 0,66 0,64
168 0,79 0,78 0,74 0,66 0,64
180 0,81 0,80 0,76 0,68 0,65
192 0,83 0,82 0,77 0,69 0,66
200 0,85 0,83 0,79 0,70 0,67
210 0,86 0,85 0,80 0,71 0,68
220 0,88 0,87 0,81 0,72 0,68
260 0,95 0,93 0,87 0,75 0,72
288 1,00 0,98 0,91 0,78 0,74
300 1,00 0,93 0,79 0,75
336 0,98 0,83 0,78
350 1,00 0,84 0,79
412 0,90 0,84
425 0,92 0,85
500 0,99 0,92
510 Value without reduction = 1 1,00 0,93
560 0,97
600 1,00

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X Influence of concrete edge distance (splitting)

MTP-X
c,sp

c [mm]
M8 M10 M12 M16 M20

N 50 0,54
60 0,58 0,57 Invalid value
65 0,61 0,59
70 0,63 0,62 0,57
75 0,65 0,64 0,59
80 0,67 0,66 0,61
C 83 0,69 0,67 0,62
84 0,69 0,68 0,62
0,5 • c
+ 0,15 2c <
• 2
= 0,35 + _1 85 0,70 0,68 0,63
c,sp
Ccr,sp Ccr,sp
90 0,72 0,70 0,65
96 0,75 0,73 0,67
100 0,77 0,75 0,68
105 0,79 0,77 0,70
110 0,82 0,80 0,72
125 0,90 0,87 0,78
128 0,91 0,89 0,80 0,64
130 0,92 0,90 0,80 0,64
135 0,95 0,92 0,82 0,66
144 1,00 0,97 0,86 0,68
150 1,00 0,89 0,70 0,64
168 0,97 0,74 0,68
175 1,00 0,76 0,69
180 1,02 0,78 0,70
206 0,85 0,76
213 0,87 0,78
250 0,98 0,87
255 Value without reduction = 1 1,00 0,88
280 0,95
300 1,00

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Influence of concrete edge distance (concrete cone)

MTP-X
c,N
MTP-X
c [mm]
M8 M10 M12 M16 M20
50 0,77 N
53 0,80
60 0,87 0,75 Invalid value
63 0,90 0,77
65 0,92 0,79
70 0,98 0,83 0,75
72 1,00 0,85 0,76 C
75 0,87 0,78
0,5 • c
+ 0,15 2c <
• 2

80 0,91 0,82
= 0,35 + _1
c,N
Ccr,N Ccr,N
83 0,94 0,84
85 0,96 0,85
90 1,00 0,89
98 0,95
100 0,96
105 1,00
110
113
125
126
128 Value without reduction = 1 1,00
135
150 1,00
*The critical concrete edge distance matches the minimum concrete edge distance

Influence of reinforcements re,N

MTP-X

re,N
M8 M10 M12 M16 M20
0,74 0,80 0,85 0,93 1,00
hef
*This factor only applies for a high density of reinforcements. If in the area of the anchor there are reinforcements
re,N
= 0,5 + _1
<
with a distancing of ≥ 150 mm (any diameter) or with a diameter ≤ 10 mm and a distancing of ≥ 100 mm, a fre,N = 200
1 factor may be applied.

Influence of base material thickness h,sp

MTP-X

h,sp
h/hef 2,00 2,20 2,40 2,60 2,80 3,00 3,20 3,40 3,60 ≥3,68

h,sp
1,00 1,07 1,13 1,19 1,25 1,31 1,37 1,42 1,48 1,50

( )
2/3
h h
= _ 1,5
<
h,sp
2 hef
•

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X
SHEAR LOADS
• Steel design resistance without lever arm: VRd,s
• Pry-out design resistance: VRd,cp = k • NºRd,c
• Concrete edge design resistance: VRd,c = VºRd,c • b • se,V
•
c,V
•
re,V
•
,V
•
h,V

Steel design resistance V

VRd,s
Size M8 M10 M12 M16 M20

VRd,s [kN] 8,8 13,9 20,2 37,7 58,5

V
Pry-out design resistance*
VRd,cp = k • NºRd,c
Size M8 M10 M12 M16 M20

k 1 2 2 2 2

* NºRd,c Concrete cone design resistance for tension loads

V
Concrete edge resistance
VRd,c = VºRd,c • b
•
se,V
•
c,V
•
re,V
•
,V
•
h,V

Size M8 M10 M12 M16 M20

Non-cracked concrete [kN] 6,2 8,9 11,5 15,9 20,8

VºRd,c
Cracked concrete [kN] 4,4 6,3 8,2 11,3 14,7

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Coefficients of influence
MTP-X
Influence of concrete strength in concrete edge failure b

M8 M10 M12 M16 M20

C 20/25 1,00

C 30/37 1,22
b
C 40/50 1,41
= fck,cube >
_1
b
C 50/60 1,55 25

Influence of edge distance and spacing se,V

FOR ONE ANCHOR ONLY

c/hef 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,25 2,50 2,75 3,00 3,25 3,50 3,75 4,00 4,50 5,00

Isolated 0,35 0,65 1,00 1,40 1,84 2,32 2,83 3,38 3,95 4,56 5,20 5,86 6,55 7,26 8,00 9,55 11,18

FOR TWO ANCHORS

c/hef 0,50 0,75 1,00 1,25 1,50 1,75 2,00 2,25 2,50 2,75 3,00 3,25 3,50 3,75 4,00 4,50 5,00

1,0 0,24 0,43 0,67 0,93 1,22 1,54 1,89 2,25 2,64 3,04 3,46 3,91 4,37 4,84 5,33 6,36 7,45

1,5 0,27 0,49 0,75 1,05 1,38 1,74 2,12 2,53 2,96 3,42 3,90 4,39 4,91 5,45 6,00 7,16 8,39
s/c

2,0 0,29 0,54 0,83 1,16 1,53 1,93 2,36 2,81 3,29 3,80 4,33 4,88 5,46 6,05 6,67 7,95 9,32

2,5 0,32 0,60 0,92 1,28 1,68 2,12 2,59 3,09 3,62 4,18 4,76 5,37 6,00 6,66 7,33 8,75 10,25

≥3,0 0,35 0,65 1,00 1,40 1,84 2,32 2,83 3,38 3,95 4,56 5,20 5,86 6,55 7,26 8,00 9,55 11,18

S
C C

V V

( ) ( )( ) ( )
1,5 1,5 1,5
c c s c
= = • 1+ • 0,5 ≤
se,V
hef se,V
hef 3• c hef

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X Influence of concrete edge distance

MTP-X
c,V

c [mm]
M8 M10 M12 M16 M20
40
45
C
50 0,69 Invalid value
55 0,68
60 0,67 0,70

V 65 0,66 0,69 0,71

70 0,65 0,68 0,70
80 0,63 0,66 0,68

( )
0,20
d
= 85 0,62 0,65 0,68 0,72
c,V
c 90 0,62 0,64 0,67 0,71
100 0,60 0,63 0,65 0,69 0,72
105 0,60 0,62 0,65 0,69 0,72
110 0,59 0,62 0,64 0,68 0,71
120 0,58 0,61 0,63 0,67 0,70
125 0,58 0,60 0,63 0,66 0,69
130 0,57 0,60 0,62 0,66 0,69
135 0,57 0,59 0,62 0,65 0,68
140 0,56 0,59 0,61 0,65 0,68
150 0,56 0,58 0,60 0,64 0,67
160 0,55 0,57 0,60 0,63 0,66
170 0,54 0,57 0,59 0,62 0,65
175 0,54 0,56 0,59 0,62 0,65
180 0,54 0,56 0,58 0,62 0,64
190 0,53 0,55 0,58 0,61 0,64
200 0,53 0,55 0,57 0,60 0,63
210 0,52 0,54 0,56 0,60 0,62
220 0,52 0,54 0,56 0,59 0,62
230 0,51 0,53 0,55 0,59 0,61
240 0,51 0,53 0,55 0,58 0,61
250 0,50 0,53 0,54 0,58 0,60
260 0,50 0,52 0,54 0,57 0,60
270 0,49 0,52 0,54 0,57 0,59
280 0,49 0,51 0,53 0,56 0,59
290 0,49 0,51 0,53 0,56 0,59
300 0,48 0,51 0,53 0,56 0,58

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MECHANICAL ANCHORS
Through-bolt anchor for heavy duty MT

Influence of reinforcements re,V

Perimetral Perimetral
Without perimetral
reinforcements reinforcements with
reinforcements
≥ Ø12 mm brackets ≤ 100 mm
Non-cracked concrete 1 1 1
Cracked concrete 1 1,2 1,4

Influence of load application angle ,V

Angle, (º) 0° 10° 20° 30° 40° 50° 60° 70° 80° 90°

,V
1,00 1,01 1,05 1,13 1,24 1,40 1,64 1,97 2,32 2,50

0º

V 1
= _1
>

( )
,V
sin v 2
( cos v )2 +
90º
2,5

Influence of base material thickness h,V

MTP-X
h/c 0,15 0,30 0,45 0,60 0,75 0,90 1,05 1,20 1,35 ≥1,5

h,V
0,32 0,45 0,55 0,63 0,71 0,77 0,84 0,89 0,95 1,00 c
V
h

( )
0,5
h
= _ 1,0
>
h,V
1,5 • c

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MT Through-bolt anchor for heavy duty
MECHANICAL ANCHORS

MTP-X
FIRE RESISTANCE
Characteristic Resistance*
TENSION SHEAR
M8 M10 M12 M16 M20 M8 M10 M12 M16 M20

RF30 0,4 0,9 1,7 3,1 4,9 0,4 0,9 1,7 3,1 4,9

RF60 0,3 0,8 1,3 2,4 3,7 0,3 0,8 1,3 2,4 3,7

RF90 0,3 0,6 1,1 2,0 3,2 0,3 0,6 1,1 2,0 3,2

RF120 0,2 0,5 0,8 1,6 2,5 0,2 0,5 0,8 1,6 2,5

*The safety factor for design resistance under fire exposure is =1 (in abscence of other national regulations). As a eresult the Characteristic Resistance is the same as Design
M,fi
Resistance.

Maximum Load Recommended

TENSION SHEAR
M8 M10 M12 M16 M20 M8 M10 M12 M16 M20

RF30 0,3 0,6 1,2 2,2 3,5 0,3 0,6 1,2 2,2 3,5
RF60 0,2 0,6 0,9 1,7 2,6 0,2 0,6 0,9 1,7 2,6
RF90 0,2 0,4 0,8 1,4 2,3 0,2 0,4 0,8 1,4 2,3
RF120 0,1 0,4 0,6 1,1 1,8 0,1 0,4 0,6 1,1 1,8

RANGE
Maximum Maximum
Seismic Axle letter Seismic Axle letter
Code Size thickness Code Size thickness
assessment (length) assessment (length)
of fixture of fixture

• APX08050 - M8 x 50 Ø8 2 A 100 800 APX12120 C1&C2 M12 x 120 Ø12 24 G 50 200

APX08075 - M8 x 75 Ø8 9 C 100 600 APX12130 C1&C2 M12 x 130 Ø12 34 H 50 200

APX08080 - M8 x 80 Ø8 14 D 100 600 APX12150 C1&C2 M12 x 150 Ø12 54 I 50 100

APX08095 - M8 x 95 Ø8 29 E 100 600 APX12180 C1&C2 M12 x 180 Ø12 84 L 50 150

APX08115 - M8 x 115 Ø8 49 G 100 400 APX12200 C1&C2 M12 x 200 Ø12 104 M 50 150

APX10090 C1 M10 x 90 Ø10 10 E 100 400 APX12220 C1&C2 M12 x 220 Ø12 124 O 25 50

APX10105 C1 M10 x 105 Ø10 25 F 50 300 APX12255 C1&C2 M12 x 255 Ø12 159 R 25 50

APX10115 C1 M10 x 115 Ø10 35 G 50 200 APX16145 C1 M16 x 145 Ø16 28 I 25 100

APX10135 C1 M10 x 135 Ø10 55 H 50 200 APX16175 C1 M16 x 175 Ø16 58 K 25 50

APX10165 C1 M10 x 165 Ø10 85 K 50 200 APX16220 C1 M16 x 220 Ø16 103 O 25 50

APX10185 C1 M10 x 185 Ø10 105 L 50 150 APX16250 C1 M16 x 250 Ø16 133 Q 25 50

• APX12080 - M12 x 80 Ø12 4 D 50 300 APX20170 C1&C2 M20 x 170 Ø20 32 K 20 40

APX12100 C1&C2 M12 x 100 Ø12 4 E 50 200 APX20200 C1&C2 M20 x 200 Ø20 62 M 20 40

APX12110 C1&C2 M12 x 110 Ø12 14 F 50 200

• Non assessed sizes. Resistance values and installation data are not applicable to these references. For further information, please contact Technical Department.

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