3d slot-anchor system

TECHNICAL MANUAL - 3D SYSTEM 

3D SLOT-ANCHOR SYSTEM 

alterations reserved Page 1


CONTENTS: 

3D SLOT-ANCHOR SYSTEM .................................................................................................................................... 1 

CONTENTS: ............................................................................................................................................................... 2 

INTRODUCTION ........................................................................................................................................................ 4 

DIFFERENT SYSTEM ................................................................................................................................................ 4 

SPHERICAL HEAD ANCHOR, T- SLOT ANCHOR ............................................................................................... 5 

O-ANCHOR ............................................................................................................................................................. 5 

P-ANCHOR ............................................................................................................................................................. 5 

TKA-ANCHOR ........................................................................................................................................................ 5 

TSG-ANCHOR ........................................................................................................................................................ 5 

TKS-ROD SLOT-ANCHOR ..................................................................................................................................... 5 

CHARACTERISTICS ................................................................................................................................................. 6 

T SLOT ANCHOR ................................................................................................................................................... 6 

DIFFERENT TYPES............................................................................................................................................ 7 

ANCHOR ARRANGEMENT .............................................................................................................................. 10 

P-PIPE SLOT-ANCHOR ....................................................................................................................................... 13 

TKA-TILT SLOT-ANCHOR ................................................................................................................................... 14 

TSG – OFFSET ANCHOR .................................................................................................................................... 16 


TKS-SLOT ANCHOR ............................................................................................................................................ 17 

TPA – PLATE ANCHOR ....................................................................................................................................... 18 


LIFTING CLUTCHES ............................................................................................................................................... 19 

OPERATING INSTRUCTIONS ............................................................................................................................. 20 

3D LIFTING SYSTEM MAINTENANCE ................................................................................................................... 21 

ATTACHMENT OF THE SLOT-ANCHORS IN CONCRETE .................................................................................. 23 

RECESS FORMERS ................................................................................................................................................ 23 

RB – STANDARD RUBER RECESS FORMER ................................................................................................... 23 

SRB – NARROW RUBBER RECESS FORMER .................................................................................................. 23 

RBK – TKA RUBBER RECESS FORMER ........................................................................................................... 24 

RBP – RUBBER RECESS FORMER ................................................................................................................... 24 

RBP PU – POLYETHYLENE RECESS FORMER ............................................................................................... 24 

SBK – STEEL RECESS FORMER ....................................................................................................................... 25 

PRBM – MAGNETIC RECESS FORMER ............................................................................................................ 25 

RR – RUBBER RING ............................................................................................................................................ 25 

FIXING ACCESORIES FOR THE RUBBER RECESS FORMERS ........................................................................ 26 

IP – FIXING PLATE .............................................................................................................................................. 26 

IPD – FIXING PLATE WITH THREAD ROD / IPDV – FIXING PLATE WITH THREAD ROD AND WING NUT . 26 

TDV – THREAD HOLDING SCREW .................................................................................................................... 26 



OPR – MOUNTING PLATE .................................................................................................................................. 27 

GENERAL INSTRUCTIONS FOR INSTALLATION AND USE ............................................................................... 28 

RUBBER RECESS FORMERS ............................................................................................................................ 28 

STEEL AND MAGNETIC RECESS FORMER...................................................................................................... 29 

WELDING TO THE ANCHORS ............................................................................................................................... 29 

CALCULATION OF THE T-SLOT ANCHOR........................................................................................................... 30 

LIFTING IN AN ANGLE......................................................................................................................................... 30 

DYNAMIC FORCES .............................................................................................................................................. 30 

DIRECTION FOR STICK FACTORS .................................................................................................................... 30 

ANCHORING OF T-SLOT-ANCHORS ................................................................................................................. 31 

OVERVIEW OF T-SLOT-ANCHORS LENGTHS ................................................................................................. 32 

CALCULATION EXAMPLE 1 ................................................................................................................................ 34 

TABLE 1 ............................................................................................................................................................ 35 


TABLE 2 ............................................................................................................................................................ 37 


TABLE 3 ............................................................................................................................................................ 39 

CALCULATION EXAMLE 4 .................................................................................................................................. 40 

TABLE 4 ............................................................................................................................................................ 41 

CALCULATION EXAMPLE TKA ........................................................................................................................... 42 

TABLE 5 ............................................................................................................................................................ 43 

THREAT ANALYSIS ................................................................................................................................................ 43 

Disclaimer ................................................................................................................................................................ 43 



INTRODUCTION 

For the transportation, lifting and mounting of concrete elements the best choice is to use the T-Slot- anchor system. This lifting 

system is the safest method to transport concrete elements through the air. The system is fast to use and the use of a cheap T- 

Slot-anchor makes the application of this lifting system the most economic system. 

The T-Slot-anchor system exists of three main products. That is a T-Slot-anchor which is poured in concrete together with a 

rubber recess former and a TH 2 lifting clutch, which can be used for a long time. 

The T-Slot-anchor is built in the concrete element with the aid of a rubber recess former. After the pouring of the shuttering 

and after the concrete is hardened, the rubber ball can be removed. The TH 2 lifting clutch fits exactly in the created hole and 

the prefab element can be pulled up out of the shuttering. 

DIFFERENT SYSTEM 

“Terwa” offers different lifting clutches and a wide range of different recess formers. The difference between all systems is 

actually defined by the type of anchors. 

The anchors are forged from round carbon steel; for 45 t anchors alloyed carbon steel is used. Available in black (without 

surface treatment but slightly oiled) or hot dip galvanised. 

A small range of stainless carbon steel anchors (A2) is available as well. All anchors are designed to fulfil a minimum safety 

factor c=3. 



SPHERICAL HEAD ANCHOR, T- SLOT ANCHOR 

Forged from round carbon steel, they are designed for load forces in the range of 1.3t to 45.0 t. 

The 45.0 t anchors are made of alloyed steel. 

Application: Pre cast elements such as slabs, beams, panels and pipes. 

O-ANCHOR 

Forged from carbon steel, they are designed to load forces in the range of 1.3t to 32.0 t. 

Application: The O-Slot-anchor is provided with a hole, in which a reinforcement hairpin has to be 

placed to obtain a good anchoring in small elements, lightweight pre cast elements such as prestressed 

beams. 

P-ANCHOR 

Forged from round carbon steel, they are designed to load forces in the range of 1.3t to 5.0t. 

Application: The P-anchor is specially developed for the application in combination with special 

rubber slots. These lifting anchors are often used in pits, on which the holes are firmly mounted on 

the under jig and remain on the jig during the breaking away. The P-anchor is a good alternative 

for the use of the T-Slot-anchors in fixed steel holes for which a rubber ring brings the necessary 

clamping so that during the pouring the anchor remains on its place. 

TPA-ANCHOR 

A spherical head anchor forged from carbon steel with a welded plate is designed to load range of 

2.5t, 5.0t, and 10.0t. 

Application: It is suitable for thin slabs which are to be lifted or assembled in a horizontal position 

and especially for de-mould panels. 

TKA-ANCHOR 

Forged from carbon steel, they are designed to a load force in the range of 1.3t to 5.0t. 

Application: The TKA-Tilt Slot-anchor is specially developed for placing or lifting of wall elements. 

Through its specific form and in combination with a special lock form, the TH 2 lifting clutch is 

supported by the TKA-Tilt Slot-anchor. This means that there is no damage to the concrete 

element and the TKA-Tilt Slot-anchor can still be used. 

TSG-ANCHOR 

Forged from carbon steel, they are designed to a load force in the range of 1.3t to 32.0t. 

Application: Because of the offset design the anchor is suitable for the lifting and transporting of 

sandwich panels. 

TKS-ROD SLOT-ANCHOR 

Forged from rebar steel, they are designed to a load force in the range of 2.5t to 15.0t. 

Application: The TKS-Rod Slot-anchor is provided with a ribbed rod to which a good anchoring 

can be obtained. For situations in which an anchoring foot cannot be used, a TKS-Rod Slotanchor 

with an adjusted length can arrange a sufficient anchoring. Especially in very small 

elements this anchor is the best solution. 



CHARACTERISTICS 

T SLOT ANCHOR 

Basic principles for the anchor selection 

The T Anchors are forged from round steel and are designed to a load force in the range of 1.3t to 45.0t. Proper for large 

precast elements such as slabs, beams, panels, pipes. Anchors from 1.3t to 32.0t are made from S355J2 steel and the 45.0t 

anchors are made from alloyed steel 42CrMo4 (w1.7225-EN-10083-1). In the same load group, anchors are available with 

different lengths. Longer anchors are installed for reduced edge spacing or for low concrete strengths. The load on the anchor 

is transmitted to the concrete through the anchor foot. 

The anchors must be fixed in the mould using recess formers. The recess former retains the anchor securely in position during 

the concrete pour. The recess former creates a void around the anchor head which corresponds to the lifting system head 

(shackle). The incorrect coupling of parts of different load groups is impossible. Another advantage is that the shackle rests 

against the concrete during angled pull and therefore the horizontal load is transferred into the concrete directly. For this 

reason additional reinforcement is not required in large units. In thin walls, additional reinforcement is necessary for angled lift, 

to absorb the transverse pulling forces. 



DIFFERENT TYPES 

Description 

T slot standard 

Product 

No. 

Description 

T slot zinc plated 

Product 

No. 

T slot stainless steel 

304 

Description 

Product 

No. 

Load 

group 

Dimensions mm 

t L ØA ØB ØC 

T-013-0035 43795 T-013-0035-TV 43796 T-013-0035-SS2 / 1.3 35 19 10 25 

T-013-0040 43177 T-013-0040-TV 43178 T-013-0040-SS2 / 1.3 40 19 10 25 

T-013-0050 43180 T-013-0050-TV 43181 T-013-0050-SS2 43179 1.3 50 19 10 25 

T-013-0055 43182 T-013-0055-TV 43183 T-013-0055-SS2 / 1.3 55 19 10 25 

T-013-0065 43184 T-013-0065-TV 43185 T-013-0065-SS2 43186 1.3 65 19 10 25 

T-013-0085 43187 T-013-0085-TV 43188 T-013-0085-SS2 43189 1.3 85 19 10 25 

T-013-0120 43190 T-013-0120-TV 43191 T-013-0120-SS2 43192 1.3 120 19 10 25 

T-013-0240 43193 T-013-0240-TV 43194 T-013-0240-SS2 / 1.3 240 19 10 25 

T-025-0045 43808 T-025-0045-TV 43809 T-025-0045-SS2 / 2.5 45 26 14 35 

T-025-0055 43195 T-025-0055-TV 43196 T-025-0055-SS2 / 2.5 55 26 14 35 

T-025-0065 43197 T-025-0065-TV 43198 T-025-0065-SS2 / 2.5 65 26 14 35 

T-025-0070 43199 T-025-0070-TV 43200 T-025-0070-SS2 / 2.5 70 26 14 35 

T-025-0085 43201 T-025-0085-TV 43202 T-025-0085-SS2 43203 2.5 85 26 14 35 

T-025-0100 43204 T-025-0100-TV 43205 T-025-0100-SS2 / 2.5 100 26 14 35 

T-025-0120 43206 T-025-0120-TV 43207 T-025-0120-SS2 43208 2.5 120 26 14 35 

T-025-0140 43209 T-025-0140-TV 43817 T-025-0140-SS2 / 2.5 140 26 14 35 

T-025-0170 43210 T-025-0170-TV 43211 T-025-0170-SS2 43212 2.5 170 26 14 35 

T-025-0210 43820 T-025-0210-TV / T-025-0210-SS2 / 2.5 210 26 14 35 

T-025-0280 43213 T-025-0280-TV 43214 T-025-0280-SS2 / 2.5 280 26 14 35 

T-040-0055 43821 T-040-0055-TV 43822 T-040-0055-SS2 / 4.0 55 36 18 45 

T-040-0065 43823 T-040-0065-TV 43824 T-040-0065-SS2 / 4.0 65 36 18 45 

T-040-0070 43825 T-040-0070-TV 43826 T-040-0070-SS2 / 4.0 70 36 18 45 

T-040-0075 43771 T-040-0075-TV 43772 T-040-0075-SS2 / 4.0 75 36 18 45 

T-040-0080 43774 T-040-0080-TV 43775 T-040-0080-SS2 / 4.0 80 36 18 45 

T-040-0110 43827 T-040-0110-TV 43828 T-040-0110-SS2 / 4.0 110 36 18 45 

T-040-0140 43829 T-040-0140-TV 43830 T-040-0140-SS2 / 4.0 140 36 18 45 

T-040-0160 43831 T-040-0160-TV 43832 T-040-0160-SS2 / 4.0 160 36 18 45 

T-040-0170 43833 T-040-0170-TV / T-040-0170-SS2 / 4.0 170 36 18 45 

T-040-0180 43783 T-040-0180-TV 43784 T-040-0180-SS2 / 4.0 180 36 18 45 



Description 


Product 

No. 

Description 


Product 

No. 


304 

Description 

Product 

No. 

Load 

group 

Dimensions mm 


T-040-0210 43786 T-040-0210-TV 43787 T-040-0210-SS2 / 4.0 210 36 18 45 

T-040-0240 43789 T-040-0240-TV 43790 T-040-0240-SS2 / 4.0 240 36 18 45 

T-040-0340 43792 T-040-0340-TV 43793 T-040-0340-SS2 / 4.0 340 36 18 45 

T-050-0055 43536 T-050-0055-TV / T-050-0055-SS2 / 5.0 55 36 20 50 

T-050-0065 43215 T-050-0065-TV 43216 T-050-0065-SS2 / 5.0 65 36 20 50 

T-050-0075 43217 T-050-0075-TV 43218 T-050-0075-SS2 / 5.0 75 36 20 50 

T-050-0080 43219 T-050-0080-TV 43220 T-050-0080-SS2 / 5.0 80 36 20 50 

T-050-0085 43834 T-050-0085-TV 43221 T-050-0085-SS2 / 5.0 85 36 20 50 

T-050-0095 43222 T-050-0095-TV 43223 T-050-0095-SS2 / 5.0 95 36 20 50 

T-050-0110 43224 T-050-0110-TV 43835 T-050-0110-SS2 / 5.0 110 36 20 50 

T-050-0120 43225 T-050-0120-TV 43226 T-050-0120-SS2 43227 5.0 120 36 20 50 

T-050-0140 43228 T-050-0140-TV 43836 T-050-0140-SS2 / 5.0 140 36 20 50 

T-050-0150 43837 T-050-0150-TV 43838 T-050-0150-SS2 / 5.0 150 36 20 50 

T-050-0160 43229 T-050-0160-TV 43230 T-050-0160-SS2 / 5.0 160 36 20 50 

T-050-0180 43231 T-050-0180-TV 43232 T-050-0180-SS2 43233 5.0 180 36 20 50 

T-050-0210 43234 T-050-0210-TV 43235 T-050-0210-SS2 / 5.0 210 36 20 50 

T-050-0240 43236 T-050-0240-TV 43237 T-050-0240-SS2 43238 5.0 240 36 20 50 

T-050-0340 43239 T-050-0340-TV 43240 T-050-0340-SS2 / 5.0 340 36 20 50 

T-050-0480 43839 T-050-0480-TV 43840 T-050-0480-SS2 / 5.0 480 36 20 50 

T-075-0085 43241 T-075-0085-TV 43841 T-075-0085-SS2 / 7.5 85 46 24 60 

T-075-0095 43242 T-075-0095-TV 43243 T-075-0095-SS2 / 7.5 95 46 24 60 

T-075-0120 43244 T-075-0120-TV 43245 T-075-0120-SS2 43246 7.5 120 46 24 60 

T-075-0140 43842 T-075-0140-TV / T-075-0140-SS2 / 7.5 140 46 24 60 

T-075-0150 43247 T-075-0150-TV 43248 T-075-0150-SS2 / 7.5 150 46 24 60 

T-075-0160 43249 T-075-0160-TV 43250 T-075-0160-SS2 / 7.5 160 46 24 60 

T-075-0165 43251 T-075-0165-TV 43252 T-075-0165-SS2 / 7.5 165 46 24 60 

T-075-0170 43253 T-075-0170-TV / T-075-0170-SS2 / 7.5 170 46 24 60 

T-075-0200 43254 T-075-0200-TV 43255 T-075-0200-SS2 / 7.5 200 46 24 60 

T-075-0300 43256 T-075-0300-TV 43257 T-075-0300-SS2 43258 7.5 300 46 24 60 

T-075-0540 43259 T-075-0540-TV 43260 T-075-0540-SS2 / 7.5 540 46 24 60 

T-075-0680 43843 T-075-0680-TV 43844 T-075-0680-SS2 / 7.5 680 46 24 60 

T-100-0085 43261 T-100-0085-TV 43262 T-100-0085-SS2 / 10.0 85 46 28 70 

T-100-0090 / T-100-0090-TV 43263 T-100-0090-SS2 / 10.0 90 46 28 70 

T-100-0100 43264 T-100-0100-TV 43845 T-100-0100-SS2 / 10.0 100 46 28 70 

T-100-0110 43265 T-100-0110-TV / T-100-0110-SS2 / 10.0 110 46 28 70 

T-100-0115 43266 T-100-0115-TV 43267 T-100-0115-SS2 43268 10.0 115 46 28 70 

T-100-0120 43269 T-100-0120-TV 43270 T-100-0120-SS2 / 10.0 120 46 28 70 



Description 


Product 

No. 

Description 


Product 

No. 


304 

Description 

Product 

No. 

Load 

group 

Dimensions mm 


T-100-0135 43271 T-100-0135-TV 43272 T-100-0135-SS2 / 10.0 135 46 28 70 

T-100-0140 43847 T-100-0140-TV / T-100-0140-SS2 / 10.0 140 46 28 70 

T-100-0150 43273 T-100-0150-TV 43274 T-100-0150-SS2 / 10.0 150 46 28 70 

T-100-0170 43275 T-100-0170-TV 43276 T-100-0170-SS2 43277 10.0 170 46 28 70 

T-100-0200 43848 T-100-0200-TV / T-100-0200-SS2 / 10.0 200 46 28 70 

T-100-0220 43278 T-100-0220-TV 43849 T-100-0220-SS2 / 10.0 220 46 28 70 

T-100-0250 43279 T-100-0250-TV 43280 T-100-0250-SS2 / 10.0 250 46 28 70 

T-100-0340 43281 T-100-0340-TV 43282 T-100-0340-SS2 43283 10.0 340 46 28 70 

T-100-0500 43514 T-100-0500-TV / T-100-0500-SS2 / 10.0 500 46 28 70 

T-150-0140 43851 T-150-0140-TV 43852 T-150-0140-SS2 / 15.0 140 70 38 80 

T-150-0150 43853 T-150-0150-TV 43854 T-150-0150-SS2 / 15.0 150 70 38 80 

T-150-0165 43287 T-150-0165-TV 43288 T-150-0165-SS2 / 15.0 165 70 38 80 

T-150-0170 43855 T-150-0170-TV / T-150-0170-SS2 / 15.0 170 70 38 80 

T-150-0200 43856 T-150-0200-TV 43857 T-150-0200-SS2 / 15.0 200 70 38 80 

T-150-0210 43289 T-150-0210-TV 43290 T-150-0210-SS2 / 15.0 210 70 38 80 

T-150-0300 43291 T-150-0300-TV 43292 T-150-0300-SS2 / 15.0 300 70 38 80 

T-150-0400 43293 T-150-0400-TV 43294 T-150-0400-SS2 / 15.0 400 70 38 80 

T-150-0840 43295 T-150-0840-TV 43296 T-150-0840-SS2 / 15.0 840 70 38 80 

T-200-0165 43858 T-200-0165-TV 43297 T-200-0165-SS2 / 20.0 165 70 40 98 

T-200-0200 43298 T-200-0200-TV / T-200-0200-SS2 / 20.0 200 70 40 98 

T-200-0240 43859 T-200-0240-TV / T-200-0240-SS2 / 20.0 240 70 40 98 

T-200-0250 43299 T-200-0250-TV 43300 T-200-0250-SS2 / 20.0 250 70 40 98 

T-200-0340 43301 T-200-0340-TV 43302 T-200-0340-SS2 / 20.0 340 70 40 98 

T-200-0500 43303 T-200-0500-TV 43304 T-200-0500-SS2 / 20.0 500 70 40 98 

T-200-1000 43305 T-200-1000-TV 43515 T-200-1000-SS2 / 20.0 1000 70 40 98 

T-320-0280 43516 T-320-0280-TV 43306 T-320-0280-SS2 / 32.0 280 88 50 135 

T-320-0320 46086 T-320-0320-TV 46087 T-320-0320-SS2 / 32.0 320 88 50 135 

T-320-0500 43517 T-320-0500-TV 43307 T-320-0500-SS2 / 32.0 500 88 50 135 

T-320-0700 43518 T-320-0700-TV 43308 T-320-0700-SS2 / 32.0 700 88 50 135 

T-320-1200 43519 T-320-1200-TV 43309 T-320-1200-SS2 / 32.0 1200 88 50 135 

T-450-0280 44567 T-450-0280-TV 44571 T-450-0280-SS2 / 45.0 280 88 50 135 

T-450-0500 44568 T-450-0500-TV 44572 T-450-0500-SS2 / 45.0 500 88 50 135 

T-450-0700 44569 T-450-0700-TV 44573 T-450-0700-SS2 / 45.0 700 88 50 135 

T-450-1200 44570 T-450-1200-TV 44574 T-450-1200-SS2 / 45.0 1200 88 50 135 



ANCHOR ARRANGEMENT 

L = anchor length 

a = edge distance 

e = cover to anchor head 

R = recess radius 

Type T Load 

Slot Group 

Dimensions mm 

Description t L R e a 

T013 1.3 120 - 240 30 10 390 

T025 2.5 140 - 280 37 11 540 

T040 4.0 170 - 340 47 15 675 

T050 5.0 180 - 480 47 15 765 

T075 7.5 300 - 680 59 15 945 

T100 10.0 250 - 680 59 15 1100 

T150 15.0 300 - 840 80 15 1250 

For slab units or de-mould of panels the edge 

distance of the “T” anchor (a) is: a = 3 x ( L + e ) 

T200 20.0 340 - 1000 80 15 1550 

T320 32.0 500 - 1200 102 23 2150 

T450 45.0 500 - 1200 102 23 2400 

Reinforcement used in anchor zone for axial pull, in panels or beams 

Type of 

anchor 

Load 

Group 

Hairpin 

dimensions mm 

Edge 

reinforcement 

Description t n x d Ls d mm 

T-013-0xxx 1.3 4 x Ø6 500 Ø6 

T-025-0xxx 2.5 4 x Ø6 500 Ø6 

T-040-0xxx 4.0 6 x Ø8 700 Ø8 

T-050-0xxx 5.0 6 x Ø8 700 Ø8 

T-075-0xxx 7.5 6 x Ø10 1160 Ø12 

T-100-0xxx 10.0 6 x Ø10 1160 Ø12 

T-150-0xxx 15.0 8 x Ø10 1240 Ø12 

T-200-0xxx 20.0 8 x Ø10 1240 Ø12 

T-320-0xxx 32.0 8 x Ø12 1400 Ø16 

T-450-0xxx 45.0 12 x Ø12 1850 Ø16 



Load capacity for axial pull in panels or beams 

Concrete strength from 15 N/mm² to 25 N/mm². 

Type of anchor Load group Minimum thickness "g" Permissible loads in kN 

Description t mm fcu ≥ 15 - 25 N/mm² 

T-013-0xxx 1.3 60 - 80 13 

T-025-0xxx 2.5 80 - 120 21 - 25 

T-040-0xxx 4.0 80 - 120 26 - 40 

T-050-0xxx 5.0 100 - 140 43 - 50 

T-075-0xxx 7.5 120 - 160 60 - 75 

T-100-0xxx 10.0 140 100 

T-150-0xxx 15.0 160 - 200 128 - 150 

T-200-0xxx 20.0 160 - 220 166 - 200 

T-320-0xxx 32.0 200 - 320 191 - 320 

T-450-0xxx 45.0 340 - 420 347 - 450 

Reinforcement used in anchor zone for angled lift in panels or beams 

Type of 

anchor 

Load 

Group 

Angled lift 

reinforcement, mm 

Slot-in-links, 

dimensions in mm 

Edge 

reinforcement 

Symbol t da c La n x d Ls i d mm 

T-013-0xxx 1.3 Ø10 25 800 8 x Ø10 680 100 Ø6 

T-025-0xxx 2.5 Ø10 25 800 8 x Ø10 900 125 Ø6 

T-040-0xxx 4.0 Ø12 30 1000 8 x Ø10 900 125 Ø8 

T-050-0xxx 5.0 Ø12 30 1000 8 x Ø10 940 125 Ø8 

T-075-0xxx 7.5 Ø16 40 1100 8 x Ø10 940 125 Ø12 

T-100-0xxx 10.0 Ø20 45 1100 8 x Ø10 1160 125 Ø12 

T-150-0xxx 15.0 2 x Ø20 45 1100 8 x Ø10 1240 125 Ø12 

T-200-0xxx 20.0 2 x Ø25 65 1500 8 x Ø10 1240 125 Ø12 

T-320-0xxx 32.0 2 x Ø25 65 1500 8 x Ø12 1400 125 Ø16 



Informative, in the top section is shown the reinforcement required, for anchor, in panels or beams for angle of lift ß ≤ 45°, with 

concrete strength of ≥ 15 N/mm². It is recommended where possible ß should not exceed 30°. 

Load capacity for angled lift up to 30°, for cast-in anchors in panels or beams 

Concrete strength from 15 N/mm² to 25 N/mm². 

Type of anchor 

Symbol (xxx= length) 

Load group 

t 

Minimum thickness "g" 

Mm 

Permissible forces in kN 

fcu ≥ 15 - 25 N/mm² 

T-013-0xxx 1.3 95 13 

T-025-0xxx 2.5 100 – 120 25 

T-040-0xxx 4.0 120 – 160 34 - 40 

T-050-0xxx 5.0 120 – 180 38 - 50 

T-075-0xxx 7.5 140 – 260 42 - 75 

T-100-0xxx 10.0 140 – 280 58 - 100 

T-150-0xxx 15.0 160 – 300 79 - 150 

T-200-0xxx 20.0 160 - 280 128 - 200 

T-320-0xxx 32.0 200 - 400 147 - 320 

Load capacity of the anchors in slabs 

or de-mould panels for pull or angled 

lift up to 30° 

Concrete strength from 15 N/mm² to 

25 N/mm². 

Type of 

Anchor (xxx= 

length) 

Description 

Load 

group 

t 

e 

mm 

L 

mm 

g 

mm 

a 

mm 

Permissible 

force in kN 

fcu > 15-25 

N/mm2 

T-013-0xxx 1.3 10 35 - 85 55 - 105 150 - 285 5 - 13 

T-025-0xxx 2.5 11 45 - 85 66 - 106 160 - 290 17 - 25 

T-040-0xxx 4.0 15 75 - 110 100 - 135 270 - 345 18 - 40 

T-050-0xxx 5.0 15 85 - 120 110 - 145 300 - 405 24 - 50 

T-075-0xxx 7.5 15 95 - 165 115 - 190 345 - 540 32 - 75 

T-100-0xxx 10.0 15 115 - 170 140 - 195 390 - 555 44 - 100 

T-150-0xxx 15.0 15 140 - 200 165 - 225 465 - 645 68 - 140 

T-200-0xxx 20.0 15 200 - 240 225 - 265 645 - 765 145 - 200 

T-320-0xxx 32.0 23 280 313 910 240 



P-PIPE SLOT-ANCHOR 

Characteristics of P-Pipe Slot-anchors 

The collar below the anchor head seals the former when the anchor is pushed into the former. 

P-Pipe Slot-anchor 

type 

Axial 

Load [kN] 

Length [mm] Ø A [mm] Ø B [mm] 

P 13-85 13 85 19 19 

P 13-120 13 120 19 19 

P 25-55 25 55 26 26 

P 25-120 25 120 26 26 

P 25-170 25 170 26 26 

O-EYE SLOT-ANCHOR 

Characteristics of O-Eye slot anchor 

Type: 

L[mm] 

Axial load 

[kN] 

ØA 

[mm] 

ØB 

[mm] 

ØC 

[mm] 

E(B10) 

[mm] 

E(B20) 

[mm] 

E(B30) 

[mm] 

O-13-65 65 13 19 10 9 700 600 450 8 

O-13-65-TV 65 13 19 10 9 700 600 450 8 

O-25-90 90 25 26 14 13 1100 700 600 10 

O-25-90-TV 90 25 26 14 13 1100 700 600 10 

O-50-90 90 50 36 20 18 1600 1100 900 16 

O-50-120 120 50 36 20 18 1600 1100 900 16 

O-50-120-TV 120 50 36 20 18 1600 1100 900 16 

O-100-115 115 100 47 28 25 2000 1400 1100 20 

O-100-115 TV 115 100 47 28 25 2000 1400 1100 20 

O-100-180 180 100 47 28 25 2000 1400 1100 20 

O-100-180-TV 180 100 47 28 25 2000 1400 1100 20 

O-200-250 250 200 70 39 37 3000 2000 1700 32 

O-200-250 TV 250 200 70 39 37 3000 2000 1700 32 

O-320-300 300 320 88 50 47 3800 2700 2100 40 

O-320-300 TV 300 320 88 50 47 3800 2700 2100 40 

Ø e 

[mm] 



TKA-TILT SLOT-ANCHOR 

Characteristics of TKA anchors 

The IPK is mounted in the RBK in order to stabilize the RBK during pouring and hardening 

TKA-anchor type 

Axial 

Load 

[kN] 

Length L 

[mm] 

Ø D1 [mm] 

Ø d [mm] 

TKA-13-120 13 120 23 11 

TKA-25-170 25 170 34 16 

TKA-50-240 50 240 50 21 

Characteristics of RBK balls: 

RBK-recess former 

Axial 

Load 

[kN] 

Length L 

[mm] 

Height H 

[mm] 

Width B 

[mm] 

RBK-13 13 70 33 50 

RBK-25 25 86 40 60 

RBK-50 50 110 52 78 

Characteristics of IPK plates: Characteristics of P-Pipe Slot-anchors 

IPK-plates 

Axial 

Load 

[kN] 

Length L 

[mm] 

Height H 

[mm] 

Width B 

[mm] 

IPK -13 13 54 12 15 

IPK -25 25 67 12 20 

IPK -50 50 84 18 25 



Additional Reinforcements: 

Reinforcement 


Axial Load 

[kN] 

Mesh reinforcement 

[mm²/m] 

ds1 [mm] L(straight) [mm] L(bended) [mm] L1 [mm] 

TKA-13-120 13 131 10 800 500 500 

TKA-25-170 25 131 10 1250 800 500 

TKA-50-240 50 2 x131 12 1700 1100 750 

Permissible load: 

Transverse lift 

Diagonal lift 


Axial 

Load 

[kN] 

TKA-13-120 13 

TKA-25-170 25 

TKA-50-240 50 

Element 

thickness 

[mm] 

Transverse lift [kN] 

Concrete strength: 

Diagonal lift up to 45º [kN] 

Concrete strength 

10 N/mm² 15 N/mm² 10 N/mm² 15 N/mm² 

80 2,4 3 8 10 

100 3,4 4 10 12 

120 4,4 5 12 13 

100 6,4 7,8 18 24 

110 7,4 9 18 24 

120 8,4 10,3 19 25 

130 9,5 11,6 19 25 

140 12,7 15,6 31 42 

150 14,1 17,3 33 44 

160 15,6 19,1 35 46 

Weigth 

[Kg] 

0,2 

0,45 

1,25 



TSG – OFFSET ANCHOR 

The TSG anchor is designed to a load force in the range of 1.3t to 32.0t. This type of anchor is mainly used in sandwich 

panels. 

TSG standard 

TSG zinc plated 

Load 

group 

Dimensions 

Description Product no. Description Product no. t L ØA ØB ØD E 

TSG-013-227 43087 TSG-013-227-TV 43088 1.3 227 19 10 25 50 

TSG-025-268 43089 TSG-025-268-TV 43090 2.5 268 26 14 35 50 

TSG-040-406 43091 TSG-040-406-TV 43092 4.0 406 36 18 45 60 

TSG-050-466 43093 TSG-050-466-TV 43094 5.0 466 36 20 50 60 

TSG-075-664 43095 TSG-075-664-TV 43096 7.5 664 46 24 60 70 

TSG-100-667 43097 TSG-100-667-TV 43100 10.0 667 46 28 70 70 

TSG-150-825 43101 TSG-150-825-TV 43102 15.0 825 70 38 80 90 

TSG-200-986 43103 TSG-200-986-TV 43104 20.0 986 70 40 98 90 

TSG-320-1150 45912 TSG-320-1150-TV 45913 32.0 1150 88 50 135 150 


Type of 

TSG 

Load 

group 

Length 

L 

Max. 

Load 

Max. 

Thickness 

g 

Description t mm kN mm 

013-227 1.3 227 13 80 

025-268 2.5 268 25 100 

040-406 4.0 406 40 100 

050-466 5.0 466 50 100 

075-664 7.5 664 75 120 

100-667 10.0 667 100 140 

150-825 15.0 825 150 180 

200-986 20.0 986 200 200 

320-1150 32.0 1150 320 240 



TKS-SLOT ANCHOR 

Characteristics of TKS-Slot-anchor 

TKS-Slot-anchor type Axial load [kN] Length L [mm] 

Length l (anchoring) 

[mm] 

Ø d [mm] 

Ø A [mm] 

TKS 25-400 25 400 374 14 26 

TKS 25-520 25 520 494 14 26 

TKS 50-580 50 580 548 20 36 

TKS 50-900 50 900 868 20 36 

TKS 75-750 75 750 706 24 47 

TKS 75-1150 75 1150 1106 24 47 

TKS 100-870 100 870 826 28 47 

TKS 100-1300 100 1300 1256 28 47 

TKS 150-1080 150 1080 1015 34 70 

TKS 150-1550 150 1550 1485 34 70 



TPA – PLATE ANCHOR 

TPA anchors are fitted with a welded base plate. They are designed to a load force in the range of 2.5t, 5.0t and 10.0t. This 

type of anchors is mostly used in thin panels. It is essential, that this type of anchor is used in combination with rebar steel. 

TPA standard 

TPA hot dip 

galvanized 

Dimensions mm 

Description Product no. Description Product no. t H ØA B C D 

TPA-025-055 43507 TPA-025-055-TV 44394 2.5 55 26 70 70 6 

TPA-025-085 43978 TPA-025-085-TV 45341 2.5 85 26 70 70 6 

TPA-025-120 43508 TPA-025-120-TV 44398 2.5 120 26 70 70 6 

TPA-050-055 43509 TPA-050-055-TV 45343 5.0 55 36 90 90 8 

TPA-050-065 43510 TPA-050-065-TV 44400 5.0 65 36 90 90 8 

TPA-050-095 43511 TPA-050-095-TV 45345 5.0 95 36 90 90 8 

TPA-050-110 43512 TPA-050-110-TV 44402 5.0 110 36 90 90 8 

TPA-100-110 43513 TPA-100-110-TV 45347 10.0 110 46 90 90 10 


Type of 

TPA 

Load 

group 

Dimensions 

t H e R d L 

Admissible 

Load in kN 

fcu ≥ 15 - 25 

N/mm² 

025-055 2.5 55 11 37 8 200 10 – 25 

025-085 2.5 85 11 37 10 250 10 – 25 

025-120 2.5 120 11 37 10 300 10 – 25 

050-055 5.0 55 15 47 12 450 30 – 50 

050-065 5.0 65 15 47 12 450 30 – 50 

050-095 5.0 95 15 47 12 450 30 – 50 

050-110 5.0 110 15 47 12 450 30 – 50 

100-110 10.0 110 15 59 16 600 80 – 100 



LIFTING CLUTCHES 

The 3D Lifting Systems TH2 and THR2 are made of high quality steel and they are designed with a safety factor of 5. Every 

Lifting System is individually tested and is supplied with a unique certificate. The safety factor is 3 times the working load. 

The special design of the clutch ensures a tight and safe connection to the anchor. Obviously, the shackle fits the 

hemispherical saving created by recess former perfectly. 

The lifting clutch, recess former and anchor only correspond when they are from the same load group. The load group is 

indicated on the lifting clutch 

TH2 

THR2 

Specifications of the TH2 

TH2 Zinc plated Load group Dimensions [mm] 

Type Product no. [ t ] A B C D E F G 

TH2 13 44057 1.3 48 77 60 55 40 33 165 

TH2 25 44058 2.5 50 92 75 68 55 42 205 

TH2 40/50 44059 5 68 121 86 88 64 57 240 

TH2 75/100 44060 10 84 170 110 108 90 77 346 

TH2 150/200 44061 20 124 230 140 146 118 115 520 

TH2 320 44062 32 155 303 175 195 160 155 590 

TH2 450 44719 45 155 303 175 195 160 155 590 

Specifications of the THR2 

TH2 Zinc plated Load group Dimensions [mm] 

Type Product no. [ t ] A B C d L D E F G 

THR2 40/50 45279 5 66 106 60 20 80 88 64 57 180 

THR2 75/100 45281 10 90 146 58 28 68 108 90 77 210 



OPERATING INSTRUCTIONS 

1 2 3 4 

Rotate the shackle, until 

The shackle rotates to its 

the opening corresponds 

locking position. 

with the anchor head. 

The clutch is brought in the 

right position. 

The nose of the shackle is 

pushed against the 

concrete element. 

When pitching the concrete unit with the 3D Lifting System, the nose must be in the same direction with the load. Due to the 

counterweight of the nose, the shackle remains connected, even in an unloaded state. To release the 3D Lifting System, the 

load hook is lowered and the shackle is turned up and out. Only after the Lifting System is completely detached of the recess 

and anchor, the crane can be withdrawn. The 3D lifting System can remain attached to the crane hook till another use. 

If the shackle remains in the position 

showed above, the lifting of the concrete 

unit is not possible. 



3D LIFTING SYSTEM MAINTENANCE 

In common with all lifting devices, the lifting system TH2, THR2 must be checked at least twice a year by trained personnel. 

Any defects found should be corrected before use. It is important to determine the amount of wear. The lettering and 

identification of the lifting system must be visible. If the shackle is deformed or the mouth opening is enlarged, the 3D Lifting 

System must be taken out of use and cannot be repaired. If the limiting dimensions given in the table are exceeded for “H” or 

fall below for “M” a further use of the Lifting System is not safe. Repairs, especially welding operations to the Lifting System are 

strictly forbidden. Do not combine our products with accessories from other manufacturers. 

Each 3D-Lifting System is delivered with a checking caliber for the two important dimensions. 

TYPE 

TH2 

NUMBER 

H 

MAXIMUM 

[mm] 

M 

MINIMUM 

[mm] 

CALIBER 

“NO-GO” 

NUMBER 

TH2 13 44057 13 5,5 46193 

TH2 25 44058 18 7 46194 

TH2 50 44059 24 9 46195 

TH2 100 44060 33 12 46196 

TH2 200 44061 45 18 46197 

TH2 320 44062 56 25 46198 

TH2 450 44719 56 25 46199 

H 

M 

CALIBER 

THR2 

TYPE 

MAXIMUM 

MINIMUM 

“NO-GO” 

NUMBER 

[mm] 

[mm] 

NUMBER 

THR2 40/50 45279 24 9 46195 

THR2 75/100 45281 33 12 46196 

DIMENSION “M” CHECKING 

The dimension “M” must be checked in this zone with risk of fracture during usage. 

ACCEPTABLE 

Dimension “M” is larger than minimum permitted. 

NOT ACCEPTABLE 

In this case dimension “M” is less than allowed. 



DIMENSION “H” CHECKING 

The “H” dimension must be checked in at least 3 zones with risk of enlargement during usage. 

PRIMARY ZONE 

ACCEPTABLE 

Dimension “H” is less than maximum permitted. 


In this case dimension “H” is larger than allowed. 

SECONDARY ZONE 

ACCEPTABLE 




THE THIRD ZONE 

ACCEPTABLE 






ATTACHMENT OF THE SLOT-ANCHORS IN CONCRETE 

To link together the TH 2 lifting clutch with the T-Slot-anchor there must be a socket in the concrete. This socket has a ball 

form and can be either a half ball or a small ball slot. Different aiding kits are available to realize this socket. For a half ball 

socket the TH 2 lifting clutch can be attached in any direction and eventually can turn during lifting in the socket till the lifting 

hook has arrived in its good position. The most usable is the RB recess former. 

RECESS FORMERS 

The anchors are fitted in the mold with a recess former. The saving former, enables the lifting clutch to fit over the anchor. 

Because of the special design, there is no sharp edge in the precast element. Obviously, the recess formers are available in 

the same range as the lifting clutches and the anchors. This is indicated by a load group, marked on the top. 

The formers are mounted on the mould with fixing plates. After de-mould of the element, the recess formers can be removed 

easily. Another option is represented by the magnetic and steel recess formers. 

The standard recess formers are manufactured out of rubber shore 65° - 70°. The rubber used has a good resistance to demould 

oil. The formers will keep their original shape, even when they are heated up to 120°C. They can be used many times. 

The magnetic recess formers are manufactured out of rubber. 

RB – STANDARD RUBER RECESS FORMER 

The RB recess former is used in combination with the T slot anchor, O-anchor, TPA anchor, TKS anchor and TSG anchor. 

Rubber recess former RB 

Load 

group 

Dimensions 

mm 

Description Product no. t R ØA B ØC 

RB-013 43905 1.3 30 9.5 9 10 

RB-025 43906 2.5 37 14 7.5 14 

RB-040/050 43907 5.0 47 15 11 20 

RB-075 43908 7.5 60 15 10.5 24 

RB-100 43909 10.0 60 15 10.5 28 

RB-150 43910 15 80 19 10.5 38 

RB-200 43911 20 80 19 10.5 40 

RB-320/450 43677 32 / 45 108 22 15 50 

SRB – NARROW RUBBER RECESS FORMER 

The SRB recess former is used in combination with the T slot anchor, O-anchor, TPA anchor, TKS anchor and TSG anchor. 

Because of the minimal width it is often used for thin elements, such as panels. 

Rubber recess former 

SRB 

Load 

group 

Dimensions 

mm 

Description Product no. t ØA B ØC h M N 

SRB-013 43949 1.3 9.5 7 10 29.5 37 47 

SRB-025 43950 2.5 14 6 14 39 44 59 

SRB-050 43951 5.0 15 8 20 49 60 78 

SRB-075 43952 7.5 15 8 24 58 77 97 

SRB-100 43953 10 15 8 28 58 77 97 



RBK – TKA RUBBER RECESS FORMER 

The RBK recess former is used in combination with the TKA tilt-up anchor 

Rubber recess former RBK 

Load 

group 

Dimensions 

mm 

Description Product no. t R ØA B h M N 

RBK-013 44479 1.3 33 8 6 32 36 49 

RBK-025 44480 2.5 40 10 6 38 44 60 

RBK-050 44481 5.0 55 12 8 53 55 78 

RBP – RUBBER RECESS FORMER 

The RBP recess former is used in combination with the P anchor with collar 

Rubber recess former RBP 

Description 

Product 

no. 

Load 

group 

Dimensions 

mm 

t h ØA B ØC ØD 

RBP-13-55 shore 44809 1.3 36 10 7 18.5 63 

RBP-13-70 shore 43759 1.3 36 10 7 18.5 63 

RBP-25-55 shore 44810 2.5 43.5 12 7 25.5 74 

RBP-25-70 shore 43760 2.5 43.5 12 7 25.5 74 

RBP-50-55 shore 44811 5.0 54 12 8 35.5 96 

RBP-50-70 shore 44283 5 54 12 8 35.5 96 

RBP-100-70 

shore 

44284 10 72 14 10 45 122 

RBP PU – POLYETHYLENE RECESS FORMER 

The RBP PU recess former is used in combination with the P anchor with collar. This type can be supplied on request. 

Recess former RBP-PU 

Description 

Product 

no. 

Load 

group 

Dimensions mm 

t h ØA B ØC ØD 

RBP-013-PU 44419 1.3 33 10 5 18.5 60.5 

RBP-013-PU-H 44420 1.3 43 10 15 18.5 60.5 

RBP-025-PU 44423 2.5 43.5 12 7 25.5 74 

RBP-025-PU-H 44424 2.5 53.5 12 17 25.5 74 

RBP-050-PU 44421 5.0 54 12 8 35.5 96 

RBP-050-PU-H 44422 5 64 12 18 35.5 96 



SBK – STEEL RECESS FORMER 

The SBK recess former is used in combination with T slot anchor, O anchor, TPA anchor, TKS anchor and TSG anchor. When 

these anchors are used a rubber ring RR should be fitted as well. The SBK can also be used in combination with a P anchor. 

These recess formers are mostly applied in an upside down position. 

Round steel recess former 

SBK 

Load 

group 

Dimensions 

mm 

Description Product no. t ØA B ØC ØD h R 

SBK-013 44403 1.3 M 12 7 19.9 65 28 32 

SBK-025 45855 2.5 M 12 11 26.9 80 43.5 69 

SBK-050 45856 5.0 M 12 13 36.9 101 54 65 

SBK-100 45857 10 M 16 15 47.1 129 72 80 

PRBM – MAGNETIC RECESS FORMER 

The MPB magnetic recess former is used in combination with T slot anchor, O anchor, TPA anchor, TKS anchor and TSG 

anchor. When these anchors are used a rubber ring RR should be fitted as well. The SBK can also be used in combination with 

a P anchor. These recess formers are mostly applied in an upside down position. 

Magnetic recess former 

MPB 

Load 

group 

Dimensions 

mm 

Description Product no. t ØA B ØC ØD h R 

MPB-013 45865 1.3 M 10 5 18.5 64 33 32 

MPB-025 46080 2.5 M 10 7 25.5 80 43.5 69 

MPB-050 46081 5.0 M 10 8 35.5 101 54 65 

MPB-100 46082 7.5 - 10 M 10 10 45.5 129 72 80 

RR – RUBBER RING 

The rubber ring is used when a T slot anchor, O anchor, TPA anchor, TKS anchor and TSG anchor is fitted in a SBK steel 

recess former or a MPB magnetic former. 

Rubber ring RR 

Description 

Product 

no. 

Load 

group 

Dimensions 

mm 

t D d t 

RR-013 43966 1.3 21 10 11 

RR-025 43967 2.5 31 14 12 

RR-040/050 43968 5.0 38 20 14 

RR-075 43813 7.5 49 24 20 

RR-100 43969 10.0 49 28 20 



FIXING ACCESORIES FOR THE RUBBER RECESS FORMERS 

IP – FIXING PLATE 

Fixing plate IP 

Load 

Group 

Thread 

Description Product no. t M 

IP-013 43913 1.3 M8 

IP-025 43914 2.5 M10 

IP-050 43915 5.0 M10 

IP-075/100 43916 7.5/10.0 M12 

IP-150/200 43917 15.0/20.0 M12 

IP-320 43918 32.0 M16 

IPD – FIXING PLATE WITH THREAD ROD / IPDV – FIXING PLATE WITH THREAD ROD AND WING NUT 

Fixing plate with thread rod IPD 

Load 

Group 

Dimensions 

mm 

Description Product no. t M L 

IPD-013 44051 1.3 M 8 100 

IPD-025 44052 2.5 M 10 100 

IPD-050 44053 5.0 M 10 100 

IPD-075/100 44054 7.5/10.0 M 12 100 

IPD-150/200 44055 15.0/20.0 M 12 100 

IPD-320 44056 32.0 M 16 100 

TDV – THREAD HOLDING SCREW 

The TDV is used for mounting the recess former on the steel formwork. It is fitted with two wing nuts, of which the one at the 

end is locked. 

Description 

TDV 

Product 

no. 

Load 

Group 

Dimensions 

mm 

t M L 

TDV-025 44575 0.7–2.5 M8 160 

TDV-050 44576 3.0–5.0 M8 160 

TDV-100 44577 7.5–10.0 M12 160 

TDV-200 44578 12.5-22.0 M16 160 



OPR – MOUNTING PLATE 

The OPR is available for mounting the RB recess former to the formwork. The recess former can be fitted easily on the two pins. 

The OPR also ensures that the recess former remains completely closed while pouring the concrete. The OPR can be nailed or 

welded to the formwork. 

Holding plate OPR 

Rubber recess 

former RB 

Load 

group 

Dimensions 

mm 

Description Product no. Description t D L H 

OPR-013 46058 RB-013 1.3 66 38 17 

OPR-025 46059 RB-025 2.5 80 50 20 

OPR-050 46060 RB-050 5.0 100 60 26 

OPR-075/100 46061 RB-075/100 7.5/10.0 128 80 31 

OPR-150/200 46062 RB-150/200 15.0/20.0 170 110 39 

OPR-320 46063 RB-320 32.0 236 128 54 

If the formwork can only be removed sideways, the fixing plate 

IP in combination with a threaded rod IPD or IPDV should be 

used. 

If the formwork can only be removed vertically, the fixing plate 

in combination with the threaded screw TDV should be used. 



GENERAL INSTRUCTIONS FOR INSTALLATION AND USE 

RUBBER RECESS FORMERS 

The fixing plate IP with a threaded rod and the anchor are fitted in the opened recess former. The recess former is mounted to 

the formwork with the wing nut. The nut is then tightened securing the recess former and the anchor firmly in position. 

In case of wooden formwork, the recess former can be mounted with the OPR mounting plate. The pins on the OPR ensure that 

the recess former remains closed during the process of pouring concrete. The OPR is mounted to the formwork with nails. 

Correct 

Incorrect 



REMOVAL OF THE RUBBER RECESS FORMER 

Two pieces of re-bar steel can be put in the recess former. With the use of these rods, the former bends open and it can be 

taken from the anchor. Before this, the excessive concrete should be removed. Do not use a hammer or any other tools. This 

can damage the recess former. 

STEEL AND MAGNETIC RECESS FORMER 

The steel and magnetic recess formers are always used in combination with a rubber ring or with a P anchor with collar. The 

rubber ring ensures that the anchor is fitted tight in the former. Moreover, the rubber ring prevents concrete pouring in the 

recess former. 

It is recommended that both the anchor head and rubber ring are greased with formwork oil before installation. When the pre 

cast element is lifted out of the mould, the anchor and the rubber ring detach themselves easily from the recess former. 

When using the magnetic recess former it is very important that the surface of the formwork is clean. After de-mould the 

magnetic former can be removed from the formwork with a screw. 

WELDING TO THE ANCHORS 

Welding to the anchors to, for instance, the armament web is NEVER allowed. The choosing of the material for the anchors in 

order to obtain the smallest anchor in relation to the highest safety does not allow any welding under normal circumstances. 

All the situations mentioned in this leaflet are valid for most of the cases. For variant situations or elements for which this 

instruction cannot be used you can always get advice from “Terwa”. 



CALCULATION OF THE T-SLOT ANCHOR 

The best way of calculating the lifting anchors is step by step. The following steps are in the correct sequence: 

Determine the weight of the element. 

Through a right position of the anchors, the same load per anchor can be realized. In the case that one anchor is more heavily 

loaded than the other anchor, this anchor has to be chosen for this loading. It is better to apply anchors of the same kind per 

lifting situation. 

Determine the lifting angle of the hoist cable in relation to the length axle of the T-Slot- anchor. This depends on the adjusting of 

the length of the hoist cables and the position of the lifting anchors. After determining the lifting angle, the calculation factor 

follows via the table for the force in the lifting cable. 

Estimation has to be made of the appeared dynamic forces as a result of the lifting or transport method. Lifting with a stationary 

crane, with a fine hoist possibility reduces these forces, while the forces will be increased enormously when lifting on the 

building site with a forklift truck. Determine via the table below which enlargement factor has to be calculated with. 

LIFTING IN AN ANGLE 

Angle α to concrete [º] 90 75 60 45 30 

Addition factor in force in the 

lifting part 

1 1.04 1.16 1.43 2 

DYNAMIC FORCES 

During the detaching out of the formwork dynamic forces will arise. The size of the dynamic forces depends on the form of the 

element, the formwork and the use of additions for the detaching out of the formwork. The table gives some directions for the 

enlargement factor which can be used. 

DIRECTION FOR STICK FACTORS 

Situation 

Push factor 

In a factory with a fixed crane 1,1 to 1,3 

Transport with a forklift truck at a flat floor 1,3 to 1,6 

At location with a fixed crane 1,3 to 1,5 

At location with a drivable crane 1,5 to 1,7 

Transport with a dredger at an uneven floor 1,6 to 2,0 

In extreme cases > 2.0 



Take account of 

Oiled formwork 

Taking away the side formwork 

Form of the element 

Stick factors 

Beam or pillar 1.0 to 1.10 

Vertical plate 1.10 to 1.15 

Horizontal plate 1.2 to 1.25 

Floor plates with cassettes > 2.0 

For elements with a difficult form higher factors have to be taken, especially for elements where a vacuum can arise during the 

taking out, such as with cassette floors. The forces can be a multiple of the weight. 

The action forces per anchor can be calculated as follows: 

Action Force = (weight x lifting angle factor x bumping factor x stick factor)/ (qty of anchors) 

When the action force of the most heavily loaded lifting is determined the choice of the type of the lifting anchor must be made. 

By means of the acting forces the type of the T-Slot-anchor can be determined. With the aid of the added tables can be 

determined which length of the T- Slot-anchor must be used dependably of the present concrete strength. 

When lifting in an angle by using T-Slot-anchors no reduction is needed on the permissible load. For the vertical setting of small 

elements split reinforcement can be necessary by reason that the pressing force of the lifting hook will lead directly his forces 

into the concrete. In these cases it is good to work with the TKA-Tilt Slot-anchors. 

Split reinforcement can be adjusted in the following way. The lifting clutch directly leads the pressing force to the concrete and 

starts approximately half way of the recess former. That is why the split reinforcement must be applied. See the drawing. 

ANCHORING OF T-SLOT-ANCHORS 

If the loading type of the T-Slot-anchors has been chosen, the length of the anchor has to be determined. Dependably of the 

form of the element and the strength of the concrete at the first loading, a T-Slot-anchor has to be chosen, which realizes a 

larger anchoring force than is calculated as the acting force. The admissible anchoring force is calculated with a safety factor of 

2, 5. 

The foot of the T-Slot-anchor obtains the anchoring. At collapsing of the concrete a dish formed foot arises of the T-Slot-anchor 

a break out cone with an incline of 1:3. That is why those relatively small anchoring lengths will do. 

In this technical documentation tables are added, to which in practice most of the situations can be filled in. It is also possible to 

make an exact calculation of the present situation. On request special tables can be made which fulfill the practical situation in 

the prefab factory or at the building site. 

If it is possible divide elements in the groups below, than the following rule of thumb can be used. In case of inexperience with 

the 3D Slot-anchor system, additional information is always obtainable at “Terwa”. 

Type of element: 

Beams: T-Slot-anchors with the standard length per loading type can be used. 

Horizontal plates T-Slot-anchors with a smaller length than standard can be used. 

Vertical plates T-Slot-anchors with a larger length than standard must be used. 



OVERVIEW OF T-SLOT-ANCHORS LENGTHS 

Loading 

class [kN] 

Standard type T- 

Slot-anchor 

Often used 

shortened T- Slotanchor 

Often used 

lengthened T-Slotanchor 

13 T 13-120 T 13-65 T 13-240 

25 T 25-170 T 25-85 T 25-280 

50 T 50-240 T 50-120 T 50-340 

75 T 75-300 T 75-150 T 75-540 

100 T 100-340 T 100-170 T 100-680 

150 T 150-400 T 150-210 T 150-840 

200 T 200-500 T 200-340 T 200-500 

320 T 320-700 T 320-500 T 320-1200 

450 T 450-700 T 450-500 T 450-1200 

All deliverable types of T-Slot-anchors are mentioned in the product documentation and the pricelist and can be delivered in 

untreated, spun galvanized and stainless steel. 

The calculation of the anchoring length can be done with the aid of empiric found formulas, with the VBC-90 or according to the 

rules being in preparation of the CUR-working group “Anchors in concrete” 

When calculating the admissible anchoring force besides the length of the T-Slot-anchor, the present concrete strength is of 

main importance. Mostly the deforming strength is leading or the concrete strength that is realized at the first loading of the 

anchors. If there is any doubt about the admissible concrete force or that it is not possible to realize it, additional measurements 

have to be taken. For instance, the concrete force can be enlarged in the location of the T-Slot-anchor by adjusting isolation 

material. When you use isolation material, higher temperatures can be reached in the concrete and this gives a quicker force 

development. 

The addition of extra reinforcement in the reinforcement nets almost never leads to improvement of the anchoring force. The 

anchoring force can only increase if the reinforcement is placed around and over the foot of the anchor. 

The anchoring force of the T-Slot-anchor is the biggest when the T-Slot-anchor is placed at a distance to the edge which is 3 

times larger than the built in depth so that a complete break out cone can be created. If it is not possible to have an edge 

distance to all directions of 3 times the built in depth, a better anchoring must be obtained with the aid of a longer T-Slot-anchor. 

In the table, a situation is described which fulfills as well the edge distances in all directions of 3 times larger than the built in 

length as well the situation for which the edge distance is limited to 2 directions. With the aid of these tables a good impression 

can be obtained of what the real admissible force is in situations that are more or less comparable. In case of doubt, please 

contact “Terwa”. 

For vertical plates the possibility that a horizontal break out can occur must be taken into account. Here 

also the present vertical reinforcement has no effect for the anchoring force. The situation in the figure will 

become very critical if the thickness of the element is smaller than half the thickness of the chosen T-Slotanchor. 

In this situation an additional discussion with “Terwa” is necessary. 


For these thicknesses the utilized value is obtained 


To enlarge the vertical anchoring a hairpin can be adjusted which falls around the foot. In this situation it is also very helpful to 

use the TKA-Tilt Slot-anchor, an eye anchor or a rod anchor. With these lifting anchors the anchoring is obtained by a 

reinforcement hairpin through the eye of the anchor or by a ribbed rod. 

Table of utilized charges for standard anchors as a function of the concrete strength and the thickness of the element 

Standard anchor 

T 13-120 

T 25-170 

T 40-210 

T 50-240 

T 75-300 

T 100-340 

T 150-400 

T 200-500 

T 320-700 

T 450-700 

Thickness of the element 

[mm] 

concrete strength 10 

[MPa] 


[MPa] 

60 0.740 0.990 

70 0.925 1.230 

80 1.140 1.300 

90 1.300 

80 1.350 

90 1.600 1.830 

100 1.850 2.150 

110 2.170 2.500 

120 2.500 

120 2.780 3.730 

130 3.140 4.000 

140 3.520 

150 3.940 

160 4.000 

130 3.320 4.660 

140 3.700 4.970 

150 4.120 5.000 

160 4.560 

170 5.000 

170 5.450 7.290 

180 53950 7.500 

190 6.475 

200 7.000 

210 7.500 

200 7.500 10.000 

210 8.095 

220 8.700 

230 9.350 

240 10.000 

240 11.370 15.000 

260 12.800 

280 14.340 

300 16.000 

300 16.250 20.000 

320 18.190 

340 19.900 

360 21.900 

360 24.550 32.000 

380 26.660 

400 28.890 

420 31.220 

440 33.680 

440 35.846 

460 38.128 

480 40.410 

500 42.692 


[MPa] 



CALCULATION EXAMPLE 1 

Floor element: 

Dimensions 

5.00 x 2.00 x 0.20 m³ 

4 T-Slot-anchors 

Concrete strength class B45 

Strength at de-mould 20 N/mm² 

Situation at the works: 

The element will be taken out of the box with a portal crane. There is work with an equator to prevent that the angle to the 

concrete becomes smaller than 75 º. The used T-Slot-anchor factor will be 1.04. Will also be taken into account: A push factor of 

1.3 and a Stick factor of 1.2 

Situation at the building site: 

The element will be built up with the aid of a turning crane. There is work with 2 clutches and equator to prevent that the angle to 

the concrete becomes smaller than 60 º. The T-Slot-anchor factor that must be used is 1.16. Will also be taken into account: A 

push factor of 1.3 

Determination of the weight: 

G= 5.00 x 2.0 x 0.2 (m³ x 25 kN/m³) = 50 kN 

Determination of the arisen force per anchor: 

In the prefab factory: 

50 x 1.04 x1.3 x1.2 

Force per anchor: F = 

_______________________ = 20.3 kN → normative 

4 

At the building site: 

50 x 1.16 x 1.3 


__________________ = 18.9 kN 

4 

The situation at the works during de-mould is for the choice of the loading class normative T- Slot-anchor: T -25 kN 

Determination of the length of the T-Slot-anchor 

According to the table, the T-Slot-anchor type T -25-120 will already do at a concrete strength of 20 N/mm². 

According to the rule of thumb for a floor element normally a T-Slot-anchor in shortened implementation can be used. In this 

case also a T -25-120 or a T -25-170 can be chosen. 



“Terwa” B.V. can execute for you a special calculation, for which the exact anchoring length can be calculated. 

Final conclusion: 

The floor element can be hoisted with 4 T-Slot-anchors; Type T -25-120 in untreated, spun galvanized or in stainless carbon 

steel. 

Chosen positions: 

Length direction: ca. 1/5 of the length = 1,00 m from the edge 

Transverse direction: ca. 30% of the width = 0,50 m from the edge 

Admissible break out forces for bottom plates to the edge of the element is more than 3 times the built in depth or for heavy T- 

Slot-anchors, a minimum distance of 500 mm. 

Concrete strength in N/mm². 

TABLE 1 

Anchor type 

Built in depth 

[mm] 

Concrete strength at first load: [kN] 

10 N/mm² 15 N/mm² 20 N/mm² 25 N/mm² 

T 13-65 73 9.9 13 > 13 > 13 

T 13-85 93 > 13 > 13 > 13 > 13 

T 13-120 128 > 13 > 13 > 13 > 13 

T 25-85 96 17.1 22.4 >25 >25 

T 25-120 131 >25 >25 >25 >25 

T 25-170 181 >25 >25 >25 >25 

T 50-120 115 24.5 32.2 39 45.3 

T 50-180 195 >50 >50 >50 >50 

T 50-240 255 >50 >50 >50 >50 

T 75-150 165 50.5 66.3 >75 >75 

T 75-300 315 >75 >75 >75 >75 

T 100-170 185 63.5 83.3 >100 >100 

T 100-340 355 233.9 >100 >100 

For heavy T-Slot-anchors a minimum distance of 500 mm is applicable 

T 150-300 316 100.6 132 >150 >150 

T 150-400 416 111.3 146 >150 >150 

T 200-340 356 105.9 138.9 168.4 195.6 

T 200-500 516 116.6 153.1 185.6 >200 

T 320-700 727 121.8 159.8 193.8 225 

T 320-1200 1227 125.3 164.4 199.3 231.5 




Façade element: 

Dimensions 

5.00 x 2.00 x 0.20 m³ 

4 T-Slot-anchors for de-mould 

2 T-Slot-anchors for transport and mounting 



Situation in the prefab factory: 

The element will be taken out of the box with a portal crane with the T-Slot-anchors calculated in example 1. In free storage the 

façade element will be brought to a vertical position (attention! be careful for damages of the edge or use a TKA-Tilt Slot-anchor 

to prevent damage). During the time the element is brought in a vertical position, there is worked with an equator to prevent that 

the angle to the concrete becomes smaller than 75 º. Hereby the element still rests on the floor so that the T- Slot-anchors only 

hoist half of the weight. Only when the element is in a vertical position it can be hoisted and the T-Slot-anchors will be loaded 

with the full weight. That is why the bringing of the element into a vertical position is not a normative loading. Also when de-mold 

and directly bringing into a vertical position with the aid of 2 T-Slot-anchors to the front side will not give a normative loading as 

well. 

While lifting with an equator: 

The angle to the concrete is about 90º 

The used T-Slot-anchor factor will be 1.04. Will also be taken into account: 

A push factor of 1.3 and a stick factor of 1.2 (only by reason of de-mold, so not normative). 

Situation at the building site: 

The element will be built up with the aid of a turning crane. There is worked with 2 clutches and the equator to prevent that the 

angle to the concrete becomes about 60 º. 

The used lifting anchor factor will be 1.16. 

Will also be taken into account: A push factor of 1.3 


G = 5.00 x 2.0 x 0.2 (m³ x 25 kN/m³) = 50 kN 




At the building site 

50 x 1.00 x 1.3 x 1.2 

________________________ 

2 

= 39 kN 

50 x 1.16 x 1.3 


____________________ = 37.7 kN 

2 

The situation at the building area is for the choice of the loading class normative T-Slot-anchor: T -50 kN 



Determination of the length of the T-Slot-anchor" 

According to the table, the T-Slot-anchor type T -50-340 will already do at a concrete strength of 20 N/mm². (Minimum anchoring 

force Z= 32.9 kN) 

According to the rule of thumb for a facade element normally a T-Slot-anchor in extra long implementation can be used. In this 


“Terwa” B.V. can execute for you a special calculation, for which the exact anchoring length can be calculated 


The facade element can be hoisted with 2 T-Slot-anchors type T -50-340 in untreated, spun galvanized or in stainless carbon 

steel. 



Transverse direction: in the middle of the material thickness 

Table 2 

Admissible break out forces for façade plates & beams: 

This table is value for the mentioned T-Slot-anchors at the condition that the distance to the edge of the element is more than 3 

times the built in depth and the anchor is built in the middle of the material thickness a minimum distance of 500 mm. 

The values indicated in the table are the minimum anchor forces at indicated concrete strength in N/mm². 

TABLE 2 

Anchor type 


[mm] 

Wall thickness 

[mm] 


10 N/mm² 15 N/mm² 20 N/mm² 25 N/mm² 30 N/mm² 

T 13-120 128 80 5 6.5 7.9 9.2 10.3 

T 13-120 128 120 7.4 9.7 11.8 > 13 > 13 

T 13-240 248 80 9.6 12.6 > 13 > 13 > 13 

T 13-240 248 120 > 13 > 13 > 13 > 13 > 13 

T 25-170 181 100 8.8 11.5 13.9 16.2 18.3 

T 25-170 181 140 12.2 16 19.5 22.6 >25 

T 25-280 291 100 14.1 18.5 22.5 >25 >25 

T 25-280 291 140 19.7 >25 >25 >25 >25 

T 50-240 255 120 14.8 19.5 23.6 27.4 31 

T 50-240 255 160 19.7 25.9 31.4 36.5 41.2 

T 50-340 355 120 20.7 27.1 32.9 38.2 43.2 

T 50-340 355 160 27.5 36.1 43.8 >50 >50 

T 50-480 495 120 28.8 37.8 45.9 >50 >50 

T 50-480 495 160 38.4 >50 >50 >50 >50 

T 75-300 315 160 24.4 32 38.8 45.1 51 

T 75-300 315 200 30.5 40 48.5 56.3 63.6 

T 75-540 555 160 43.1 56.6 68.6 >75 >75 

T 75-540 555 200 53.8 70.7 >75 >75 >75 

T 100-340 355 200 34.4 45.1 54.7 63.5 71.8 

T 100-340 355 250 42.9 56.3 68.2 79.2 89.5 

T 100-680 695 200 67.5 88.5 >100 >100 >100 

T 100-680 695 250 84.3 >100 >100 >100 >100 

T 150-400 416 250 50.3 66 80.1 93 105.1 

T 150-400 416 300 60.3 79.1 98.9 111.4 125.8 

T 200-500 516 300 74.9 98.3 119.2 138.4 156.4 

T 200-500 516 350 87.3 114.5 138.9 161.3 182.2 

T 320-700 727 400 140.8 184.7 224 260.1 293.9 





Determination of the maximum weight 

Starting points: 

For the transportation 2 T-Slot-Anchors anchors are put in the front side. 

For de-mould use 4 T-Slot-anchors or bring the element in vertical position with the 2 T-Slot-anchors in the front side (attention! 

be careful for damages of the edge). 


Situation in the prefab factory: 

In free storage the façade element will be brought to a vertical position (attention! be careful for damages of the edge or use a 

TKA-Tilt Slot-anchor to prevent damage). At bringing in a vertical position there is worked with an equator to prevent that the 

angle to the concrete becomes smaller than 75 º. The angle to the concrete is about 90º 


Push factor = 1.3 

Determination of the arisen force per anchor 

Gmax. x 1.00 x1.3 

_________________________ 

Arisen force: F = 

2 anchors 

In table 3 an overview of the maximum weights have been given for the façade elements when using 2 T-Slot-anchors of the 

types mentioned in the first column. For all the cases in between or divergent positions, “Terwa” B.V. can make a special 

calculation or make a special table for your factory. 



50 x 1.00 x 1.3 


______________________ = 39 kN 

2 

At the building site: 

50 x 1.16 x 1.3 


______________________ = 37.7 kN→ normative 

2 

The situation at the building site is for the choice of the loading class normative T-Slot-anchor: T -50 kN 

Determination of the length of the T-Slot-anchor" 

According to the table, the T-Slot-anchor type T -50-340 will already manage at a concrete strength of 20 N/mm². (Minimum 

anchoring force Z= 32.9 kN) 

According to the rule of thumb for a floor element normally a T-Slot-anchor in an extra long implementation can be used. In this 


“Terwa” B.V. can execute for you a special calculation, for which the exact anchoring length can be calculated 




The floor element can be hoisted with 2 T-Slot-anchors type T -50-340 in untreated, spun galvanized or in stainless carbon 

steel. 




Table 3 

Maximum weights of façade plates and beams 

This table is mentioned for the T-Slot-anchors as described under the condition that the distance to the edge of the element in 2 

directions is more than triple of the built in depth and that the anchor is 

Also the distance between the T-Slot-anchors must be more than 6 times of the built in depth. 

The values mentioned in the table are the maximum weights of the elements at a concrete strength of 15 N/mm². With this the 

use of an equator as well as a push factor are indicated. 

TABLE 3 

Anchor type 


[mm] 


[mm] 

Arisen force per anchor 

[kN] 

Maximum weight of the 

element with 2 anchors 

[kN] 

T 13-120 128 80 6.5 10 

T 13-120 128 120 9.7 14.9 

T 13-240 248 80 12.6 19.4 

T 13-240 248 120 13 20 

T 25-170 181 100 11.5 17.7 

T 25-170 181 140 16 24.7 

T 25-280 291 100 18.5 28.5 

T 25-280 291 140 >25 38.5 

T 50-240 255 120 19.5 29.9 

T 50-240 255 160 25.9 39.8 

T 50-340 355 120 27.1 41.7 

T 50-340 355 160 36.1 55.6 

T 50-480 495 120 37.8 58.2 

T 50-480 495 160 50 76.9 

T 75-300 315 160 32 49.3 

T 75-300 315 200 40 61.5 

T 75-540 555 160 56.6 87 

T 75-540 555 200 70.7 108.7 

T 100-340 355 200 45.1 69.4 

T 100-340 355 250 56.3 86.5 

T 100-680 695 200 88.5 136.2 

T 100-680 695 250 100 153.8 

T 150-400 416 250 66 101.6 

T 150-400 416 300 79.1 121.7 

T 200-500 516 300 98.3 151.2 

T 200-500 516 350 114.5 176.2 

T 320-700 727 400 184.7 284.2 

T 320-700 727 500 184.7 354.6 

When the concrete strength at first lifting has another value than 15 N/mm² of course the maximum weight of the elements is 

different 

At indication other tables can be made. 



CALCULATION EXAMLE 4 

Façade element: Determination of the maximum weight. 

Starting point 

For the transportation 2 T-Slot-anchors are put in the front side. 

For de-mould use 4 T-Slot-anchors or bring the element in vertical position with the 2 T-Slot-anchors in the front side (attention! 

be careful for damages of the edge) 


Situation at the works and at the building area: 

In free storage the façade element will be brought to a vertical position (attention! be careful for damages of the edge or use 

TKA-Tilt Slot-anchor. At bringing in a vertical position there is worked with a spring that is used with a top angle smaller than 

60º. 


Push factor = 1.3 

For de-mould other T-Slot-anchors are used. That is why no stick forces have to be taken into account. Also when it’s brought in 

a vertical position from out of the box is used then also the stick forces are not normative, because only the halve of the forces 

have to be taken into account. 

Determination of the arisen force per anchor 

Arisen force F = 

Gmax. x 1.16 x 1.3 

___________________________ 

2 anchors 

In table 4 an overview of the maximum weights has been given for the façade elements when using 2 T-Slot-anchors of the 

types mentioned in the first column. For all cases in between or divergent positions, “Terwa” B.V. can make a special calculation 

or make a special table for your factory. 



TABLE 4 

Maximum weights of façade plates and beams 

The values mentioned in the table are the maximum weights of the elements at a concrete strength of 35 N/mm². At bringing in 

a vertical position there is worked with a spring which is used with a top angle smaller than 60 º. 

Anchor type 


[mm] 


[mm] 

Arisen force per anchor 

[kN] 

Maximum weight of the 

element with 2 anchors 

[kN] 

T 13-120 128 80 11.5 15.2 

T 13-120 128 120 13 17.2 

T 13-240 248 80 13 17.2 

T 13-240 248 120 13 17.2 

T 25-170 181 100 20.3 26.9 

T 25-170 181 140 25 33.2 

T 25-280 291 100 25 33.2 

T 25-280 291 140 25 33.2 

T 50-240 255 120 34.3 45.5 

T 50-240 255 160 45.7 60.6 

T 50-340 355 120 47.8 63.5 

T 50-340 355 160 50 66.3 

T 50-480 495 120 50 66.3 

T 50-480 495 160 50 66.3 

T 75-300 315 160 56.5 75 

T 75-300 315 200 70.5 93.5 

T 75-540 555 160 75 99.5 

T 75-540 555 200 75 99.5 

T 100-340 355 200 79.6 105.5 

T 100-340 355 250 99.2 131.6 

T 100-680 695 200 100 132.6 

T 100-680 695 250 100 154.5 

T 150-400 416 250 116.5 185 

T 150-400 416 300 139.5 230 

T 200-500 516 300 173.4 265.3 

T 200-500 516 350 200 424.4 

T 320-700 727 400 450 424.4 

T 320-700 727 500 450 354.6 



CALCULATION EXAMPLE TKA 


Dimensions 

5.00 x 2.00 x0.20 m³ 

2 TKA anchors for transport and mounting 


Strength at de-boxing 20 N/mm² 

In free storage, the façade element will be brought to a vertical position by use of a TKA anchor. At bringing in a vertical position 

there is worked with an equator to prevent that the angle to the concrete becomes smaller than 75 º. Hereby rests the element 

still on the floor, so that the TKA anchors only hoist half of the weight. Only when the element is in a vertical position it can be 

hoisted and the TKA anchors will be loaded with the full weight. That is why the bringing of the element into a vertical position is 

not a normative loading. While lifting with an equator: 

The angle to the concrete is about 90º 

To be used lifting anchor factor will be 1.04. Also will be taken into account: 

A push factor of 1.3. 

Situation at the building area: 

The element will be built up with the aid of a turning crane. There is worked with 2 hooks equator to prevent that the angle to the 

concrete becomes about 60 º. 

To be used lifting anchor factor will be 1.16. 

Also will be taken into account: A push factor of 1.3 


G= 5.00 x 2.0 x 0.2 (m³ x 25 kN/m³) = 50 kN 


At the works: 

50 x 1.04 x 1.3 x 1.2 


________________________ 

= 40.6 kN 

2 

At the building area 

50 x 1.16 x 1.3 


____________________ = 37.7 kN 

2 

The situation at the building area is for the choice of the loading class normative TKA anchor: TKA-50 

Determination of the length of the TKA anchor: 

Because of the short range of products, an additional reinforcement is necessary 

Conclusion: 

The facade element can be hoisted with two TKA anchors Type TKA -50-240 in black or in zincked carbon steel 


Length direction: ca. 1/5 of the length = 1, 00 m from the edge 




Table 

Admissible break out forces for façade plates & beams 

This table is value for the mentioned TKA anchors at the condition that the distance to the edge of the element is more than 3 

times the built in depth and the anchor is built in the middle of the material thickness a minimum distance of 500 mm. 

The in the table indicated values are the minimum anchor forces at indicated. 

Concrete strength in N/mm² 

TABLE 5 

Type 


[mm] 


[mm] 


10 N/ mm² 15 N/mm² 20 N/mm² 25 N/mm² 30 N/mm² 

TKA 13-120 128 80 5 6.5 7.9 9.2 10.3 

TKA 13-120 128 120 7.4 9.7 11.8 > 13 > 13 

TKA 25-170 181 100 8.8 11.5 13.9 16.2 18.3 

TKA 25-170 181 140 12.2 16 19.5 22.6 >25 

TKA 50-240 255 120 14.8 19.5 23.6 27.4 31 

TKA 50-240 255 160 19.7 25.9 31.4 36.5 41.2 

THREAT ANALYSIS 

Threat Risk Counter measurements 

Mechanical threat by finger injuries at screwing in hoisting 

noose 

Mechanical threat by finger injuries at screwing in hoisting 

noose in the transport anchor 

Overload of the transport anchor by wrong hoisting direction 

S 

S 

S 

C: One and two hand operation is possible; at least: trained personnel at 

works and at the building area 

UI: suggestion for put down the elements on blocks 

UI: load values have taken into account wrong hoisting directions 

Overload of the transport anchor caused by not using a 

transverse or equator 

S 

UI: load values have taken a 3 times safety factor for such mistakes 

S= small 

UI=user instruction 

Disclaimer 

“Terwa” B.V. is not liable for deprivations to the products delivered by her caused by wear. “Terwa” B.V. is also not liable for 

damage caused by inaccurate and/or injudicious handling and use of the products delivered by her and/or use of these for 

purposes for which they are not produced. The responsibility of “Terwa” B.V. is furthermore limited in conformity to article 13 of 

the “Metaalunie” conditions, conditions which are applicable for all deliveries of “Terwa” B.V. 

==================

3d slot-anchor system - Terwa

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