3 PC MB Dogbone

55

www.MeadowBurke.com 877-518-7665 MB0410

Precast Products Manual

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MB DogBone Lifting System

The Meadow Burke DogBone Lifting Systemis a quality system designed to lift and handlethe concrete elements quickly, safely andeconomically. This versatile system offerseffortless lifter to anchor attachment anddisconnect in a wide range of capabilities.

56

877-518-7665 www.MeadowBurke.com MB0410


MB DogBone System Technical InformationLIFTING BODY/CLUTCH MAINTENANCEMeadow Burke recommends that users of the DogBone System schedule regular inspections to determinethe safe usability of the lifting units. If any factor is present that may affect or compromise the safety performance of the unit, such as excess wear, overloading, misuse, alteration, application of heat, etc., theunit must be serviced or permanently removed from service. Under no circumstance should the unit be modified, heated, welded or filed.

Do not attempt to straighten a bent eye link. Bent eye links should be replaced with a new eye link and newpivot pin. Replacement parts are available through your nearest Meadow Burke office.

ASSEMBLING THE DOGBONE PLASTIC RECESS FORMER AND ANCHOR Recess formers and anchors can easily be assembled.Simply squeeze the recess former across the flat surfaceto open the recess former in a clamshell effect. Insert theanchor into the opening and release the pressure on therecess former. This allows the recess former to closearound the head of the anchor and securely hold it inplace.

DOGBONE PLASTIC RECESS FORMER STRIPPINGOnce the form has been removed to expose the recessformer, insert two small rods or two screw drivers into thetwo holes provided in the recess former. A scissoringaction with the two implements will lift one side of therecess former. Grasp the lifted side of the recess formerand pull the unit out of the concrete.

ASSEMBLING THE DOGBONE STEEL RECESS FORMER AND ANCHORBegin the assembly by placing a steel recess former grom-met around the shaft of the anchor. Slide the grommet upagainst the head of the anchor and insert the anchor intothe bottom of the steel recess former. Make certain that thegrommet seals the hole in the recess former.

57



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MB DogBone System Technical InformationSETTING THE ANCHOR/RECESS FORMER ASSEMBLYRun the recess former bolt through a prop-erly placed drilled hole in the form. Drawthe recess former bolt tight to the form witha free-running wing nut. The exposed endof the anchor can be tied to the rebar mator supported by a rebar support.

LIFTING CLUTCH INSTALLATIONAnchor attachment Turn the lifting clutch upside down, positioned and centered over the head of the anchor.Drop the lifting clutch down into the void formed by the recess former. Rotate the lifting unit around the headof the anchor until the unit contacts the surface of the concrete. Installation is complete, ready to lift.

Bail positioning Always positionthe lifting cable directly over thelifting clutch to avoid alignmentproblems

Steel Form

Rubber Grommett

Anchor Tied ToReinforcing Steel

Anchor

Steel Recess Plug

58



MB DogBone System Technical InformationMB DOGBONE ANCHORS USED IN THIN WALL SECTIONSCare must be taken when locating anchors in thin wall sections. Improper installation and/or misalignmentcan seriously reduce the safe working load of the anchor. Anchors must be positioned on the centerline of the panel. Use rebar supports, spacers or tie the anchor to the rebar mat to make certain of proper positioning.

This sketch shows a misaligned, improperly posi-tioned anchor. The actual edge distance (Te) isconsiderably reduced so there must be a corre-sponding reduction in the safe working load of theanchor.

This sketch shows proper positioning of the anchoron the centerline of the panel. This allows the fullwall thickness to be used in the safe working loadselection.

The sketch below shows an anchor application and corner relationship. Safe working loads for indicatedcorner distances are displayed in the following table.

Te = Actual Edge Thickness(1/2 Wall Thickness)

Panel C.L.Panel C.L.

MinimumCorner Distance

Te

Wall T

hickne

ss

TeTe Te

59



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MB DogBone System Anchors

All DB-52 DogBone Anchors are manufactured from high quality, high strength steel.They are continually tested at a specified sampling rate during production and eachanchor head is clearly marked with its safe working load.

The accompanying table shows standard anchor sizes and safe working loads in vari-ous concrete strengths. Note that in some cases the anchor does not reach full capac-ity in the lower strength concretes. This is an important consideration when selectingthe proper anchor application. In general, concrete strengths of 2,100 psi to 3,500 psiare necessary to develop stated anchor safe working loads. The safe working loadsdisplayed in the table applies for any directional loading. Loading on the anchor can beperpendicular, horizontal or any angle in between.

(6250) DB 52 MB DOGBONE ANCHOR1-Ton, 2-Ton, 4-Ton, 6-Ton, 8-Ton, 12-Ton and 16-Ton in Face Lift Applications

1T x 2-1/2

1T x 3-3/8

1T x 4-3/4

2T x 2-3/16

2T x 3-3/8

2T x 4-3/4

2T x 5-1/2

2T x 6-3/4

2T x 11

4T x 3-3/4

4T x 4-1/4

4T x 4-3/4

4T x 5-1/2

4T x 7-1/8

4T x 9-1/2

4T x 13-3/8

8T x 4-3/4

8T x 6-3/4

8T x 10

8T x 13-3/8

16T x 9-7/8

16T x 19-5/8

1600

1900

2000

1550

2100

3250

4000

4000

4000

2550

3000

3650

4550

6900

8000

8000

4050

7000

11450

16000

11750

32000

2000

2000

2000

1900

2700

4000

4000

4000

4000

3250

3850

4700

5850

8000

8000

8000

5200

9000

14750

16000

15150

32000

2000

2000

2000

2350

3250

4000

4000

4000

4000

3950

4550

5600

6950

8000

8000

8000

6200

10750

16000

16000

17950

32000

2000

2000

2000

2800

3900

4000

4000

4000

4000

4700

5450

6700

8000

8000

8000

8000

7450

12850

16000

16000

21500

32000

DB-52 MB DOGBONE ANCHOR CAPACITIES WHEN USED IN FACE OF FLAT SLAB

1500 PSI 2500 PSI 3500 PSI

Concrete Strength

5000 PSI

5

7

10

5

7

10

11

11

11

8

9

10

11

15

19

19

10

14

20

27

20

40

Edge DistanceTension (in)

12

12

12

12

12

15

17

17

17

12

13

15

17

22

29

29

15

21

30

41

30

48

Edge DistanceShear (in)Anchor Size

1) All safety factors are approx. 4:1. 2) No safety factors in this table have been reduced to achieve higher working loads. 3) 16 ton SWL are at full 4:1 safety factors in compliance with ACI 347 and OSHA. Complies with ASTM-572.

To order, specify: quantity, name, item number and finish.

Safety Factor is approximately 4:1 in 4500 psi concrete.


60



MB DogBone System Anchors(6250) DB-52 DOGBONE ANCHOR EDGE LIFT APPLICATIONSIn edge lift applications the DogBone Anchor must be used in com-bination with two properly installed shear bars. The shear bars(anchor and cup) transfer a portion of the shear stress back into theanchor and into the concrete panel. Note: in this application thesling angle must be perpendicular to the surface of the concrete.

See the Shear Bar Anchor on page 72 and the Shear Bar Cupon page 72.

SINGLE DOGBONE ANCHOR TENSILE CAPACITIES IN THIN WALL SECTIONS

Tensile Safe Working Load Per Anchor (lbs)Corner Distance (in)

inches inches 6 inches 12 inches 18 inches 24 inches 30 inches

Actual EdgeThickness Te (in)

Critical WallThickness (in)

DB AnchorTon & Length

2 1/2"2 3/4"3"

3 1/2"4"

4 1/2"

1 1/4"1 3/8"1 1/2"1 3/4"2"

2 1/4"

1000 lbs11001200140016001800

1200 lbs13001400170019002000

1300 lbs14001600180020002000

1300 lbs14001600180020002000

1300 lbs14001600180020002000

1 TonX

4 3/4"

DB-52 1-TON TENSILE CAPACITY






3"3 1/4"3 1/2"4"5"6"3"

3 1/4"3 1/2"4"5"6"

1 1/2"1 5/8"1 3/4"2"

2 1/2"3"

1 1/2"1 5/8"1 3/4"2"

2 1/2"3"

1700 lbs19002000230029003500210023002500290036004000

1800 lbs20002200250031003700270029003200360040004000

2000 lbs22002400270034004000290032003400390040004000

2200 lbs24002600300037004000310034003600400040004000

2200 lbs24002600300037004000310034003600400040004000

2 TonX

6 3/4"


2 TonX11"

P1

Shear BarRecess Cup

Shear BarAnchor

Chair

2T

4T

8T

6-3/46-3/46-3/49-1/29-1/213-3/813-3/8

4566778

2-1/23

3-1/23-1/244

4-1/2

18242424242424

3000320035003500400045005000

Min Corner Distance Shear SWL 4:1 Safety Factor1

1Minimum concrete strength at 4000 psi.2See above for proper anchor location and required reinforcing.

Anchor Size Min. Anchor Length Min. Wall Thickness Top Edge Distance (TE)2DB-52 EDGE LIFTING WITH MB DOGBONE ANCHORS

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MB DogBone System AnchorsDB-52 SINGLE DOGBONE ANCHOR TENSILE CAPACITIES IN THIN WALL SECTIONS (cont.)






3 3/4"4"5"6"7"8"

3 3/4"4"5"6"7"8"

4 3/4"5"6"7"8"10"

1 7/8"2"

2 1/2"3"

3 1/2"4"

1 7/8"2"

2 1/2"3"

3 1/2"4"

2 3/8"2 1/2"3"

3 1/2"4"5"

2900 lbs31003600460054006200330035004400530062007100300032003800450051006300

3200 lbs34004300520060006900420045005600680079008000330035004200490056006900

3400 lbs36004600550064007300440047005900710080008000360038004600540061007500

3500 lbs36004800570067007600450049006100740080008000370039004700550062007700

3800 lbs40005100610072008000480051006400770080008000370039004700550062007700

4 TonX

13 3/8"

DB-52 4-TON & 8-TON TENSILE CAPACITY (cont.)






5"6"7"8"10"12"

6 1/2"7"8"10"12"14"

6 1/2"7"8"10"12"14"

2 1/2"3"

3 1/2"4"5"6"

3 1/4"3 1/2"4"5"6"7"

3 1/4"3 1/2"4"5"6"7"

480 lbs580068007800980011,700500060006500850010,00011,50070008000920011,50014,00016,200

5800 lbs70008200930011,70013,900600065007400930011,10012,600900010,00011,20014,30017,30020,200

6100 lbs74008600990012,30014,700640069007900990011,90013,70010,50011,50013,00016,00020,00023,000

6700 lbs8100950010,90013,60016,0072007700890011,20013,30015,40011,50012,50014,40018,00021,50025,000

7200 lbs870010,20011,70014,60016,00072007800900011,20013,40015,40012,20013,20015,10019,00022,80026,600

8 TonX

6 3/4"

8 TonX

13 3/8"

16 TonX

9 7/8"

16 TonX

19 5/8"

DB-52 8-TON & 16-TON TENSILE CAPACITY

4 TonX

9 1/2"



62



MB DogBone System AnchorsMULTIPLE MB DOGBONE ANCHORS TENSILE CAPACITIES IN THIN WALL SECTIONS

When multiple anchors are placed in a thin wall panel, caution must be exercised to prevent the anchor shearcone planes from overlapping. If overlapping is unavoidable, the anchor safe working load must be reduced.If a spacing of six times the length of the anchor, or more, is maintained the anchor shear cones will not over-lap and maximum tensile capacities can be achieved. Reference the following table.

CONCRETE REDUCTION FACTORS

All safe working loads shown in this section are based on 4,500 psi strength concrete. For use in lowerstrength concrete apply the appropriate reduction factor.

Multiply the calculated values from the following table by the appropriate reduction factor to arrive at theproper safe working load for the lower strength concrete.

Concrete Strength

450040003500300025002000

MPaPSI312824211714

Reduction Factors

1.00.94.88.82.74.66

CONCRETE REDUCTION FACTORS DATA

P P P

ALTERNATE CONE AREA

OVERLAPPING RESULTS INDRASTIC SWL REDUCTIONS

MINIMUM CORNER DISTANCE (3 L)

SPACING(LESS THAN 6 L)

L

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MB DogBone System AnchorsDB-52 MULTIPLE MB DOGBONE ANCHORS TENSILE CAPACITIES IN THIN WALL SECTIONS (Cont.)

Tensile Safe Working Load Per Anchor (lbs)Anchor Spacing (in)





2 1/2"2 3/4"3"

3 1/2 "4"

4 1/2"

2 1/4"1 3/8"1 1/2"1 3/4"2"

2 1/4"

800 lbs9001000110013001400

900 lbs10001100130015001700

1100 lbs12001300150018002000

1200 lbs14001500170020002000

1300 lbs14001600180020002000

1 TonX

4 3/4"









3 1/4"4"5"6"7"8"

3 1/4"4"5"6"7"8"

4 3/4"5"6"7"8"10"5"6"7"8"10"11"

1 7/8"2"

2 1/2"3"

3 1/2"4"

1 7/8"2"

2 1/2"3"

3 1/2"4"

2 3/8"2 1/2"3"

3 1/2"4"5"

2 1/2"3"

3 1/2"4"5"

5 1/2"

1800 lbs19002400290034003900170018002200270032003600240029003400380047005100210026003000350044004800

2400 lbs26003300390046005200240026003300400046005300260032003700420052005700320038004500520065007100

2800 lbs300038004600520061003400370046005600650075003100380044005100620068004600560065007500930010300

3200 lbs3500440052006100700038004100520062007300800037004500530060007400800051006200730083001040011400

3700 lbs3900500060007000800043004600570069008000800039004700550062007700830057006900800092001150012600

4 TonX

9 1/2"

4 TonX

13 3/8"

8 TonX

6 3/4"

8 TonX

13 3/8"

DB-52 4-TON & 8-TON TENSILE CAPACITY






3"3 1/4"3 1/2"4"5"6"3"

3 1/4"3 1/2"4"5"6"

1 1/2"1 5/8"1 3/4"2"

2 1/2"3"

1 1/2"1 5/8"1 3/4"2"

2 1/2"3"

1400 lbs15001600190023002800140016001700190024002900

1500 lbs17001800210026003200210023002500280036004000

1700 lbs19002000230029003500230025002700300036004000

1900 lbs21002200260032003800240026002800330040004000

2200 lbs24002600300037004000280030003200370040004000

2 TonX

6 3/4"

2 TonX11"



64



MB DogBone System AnchorsDB-52 MULTIPLE MB DOGBONE ANCHORS TENSILE CAPACITIES IN THIN WALL SECTIONS (Cont.)






6 1/2"7"8"10"12"14"

6 1/2"7"8"10"12"14"

3 1/4"3 1/2"4"5"6"7"

3 1/4"3 1/2"4"5"6"7"

3300 lbs35004100510061007100280031003500440053006200

4300 lbs47005300670080009300360039004500570068008000

4800 lbs520060007500900010,400560061007000880010,50012,300

5300 lbs570066008300990011,40078008500970012,20014,60017,100

6400 lbs69007900990011,90013,7009200990011,40014,30017,10020,000

16 TonX

9 7/8"

16 TonX

19 5/8"



The DB-53 DogBone Eye Anchor is used in combination with a DB-60 DogBone Rebar ReinforcingPin. This combination allows tension loads to be distributed deeply into the concrete element andproduce high safe working loads in thin wall sections.

DogBone Eye Anchors must be installed properly, centered and plumb to avoid drastic reduction ofsafe working load.

(6255) DB-53 MB DOGBONE EYE ANCHOR1-Ton, 2-Ton, 4-Ton, 8-Ton, and 16-Ton in Edge Lift Applications

DB-53 MB DOGBONE Eye Anchor/Rebar Selection Table

Safety Factor is approximately 4:1.1) Minimum concrete compressive strength, fc = 2000 psi (14 MPa).2) Safe work loads shown are based on Anchors with DB-60 rebar reinforcing installed.

Anchor Load Rating Tons

Anchor Length L

Minimum Panel Thickness Minimum Corner DistanceSafe Work Load Tension w/

RebarMinimum Anchor Spacing

in. mm in. mm in. mm lbs. kN in. mm

1-Ton2-Ton4-Ton8-Ton16-Ton

2-5/83-1/24-3/47-1/89-7/8

6690120180250

3345

6-1/2

7575100125165

846810

200100150200250

8.9017.8035.6071.10142.20

168121618

400200300400500

20004000800016,00032,000


65



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MB DogBone System Anchors

(6256) DB-60 DOGBONE REBAR REINFORCING PIN 1-Ton, 2-Ton, 4-Ton, 8-Ton, and 16-Ton in Edge Lift Applications

DB-60 DogBone Rebar Reinforcing Pins must be used with DB-53 DogBone Eye Anchors in order toachieve posted safe working loads.

Anchors must be cen-tered and plumb wheninstalled. Any deviationcan result in a reductionof safe working loads.See additional anchorinstallation informationon page 58.

C.L. OF WALL & ANCHOR(S)

MINIMUMANCHOR SPACING

MINIMUMCORNER DISTANCE

WALL

THICK

NESS

RThe DogBone Rebar Reinforcing Pin is used with the DB-53 DogBone Eye Anchorto distribute tension stress deeply into the precast concrete panel.

.306

#3

#5

#6

#8

1-Ton

2-Ton

4-Ton

8-Ton

16-Ton

7.8

9.5

15

20

25

36

24

24

48

86

900

600

600

1200

2150

12

6

7

9

12

300

150

175

225

300

3/4

1-1/4

2

2-1/2

3

19

31

50

62

75

DB-60 MB DogBone ReBaR ReinfoRceMent SpecificationS

AnchorLoad RatingTons

Rebar Grade 60Diameter Rebar Overall Length

Rebar SpreadS

Rebar Bending RadiusR

in./std. mm in. mm in. mm in. mm


DB-53

S



MB DogBone System Lifting Hardware(6270) DB-1 DOGBONE LIFTING CLUTCH

1-Ton, 2-Ton, 4-Ton, 8-Ton, 16-Ton, 25-Ton and 36-Ton

The DB-1 MB DogBone Lifting Clutch consists of a round main body with a protruding lever arm and a highstrength bail. The main body has a T slot that engages the head of a MB DogBone Anchor. The combinedrotation capabilities of the main body and the bail allows a precast panel to be lifted, turned, tilted and/orrotated while under load. See lifting body maintenance information on page 56.

Safe working loads provide an approximate 5:1 safety factor.

1) Available on special order.

66

Lifting BodyMark

Safe Work Load A B C G H T L M

Tons lbs. kN in. in. in. in. in. in. in. in.mm mm mm mm mm mm mm mm

DB-1 DogBone Lifting cLUtcH

11.3 T

1.52.5 T

3.05.0 T

6.010.0 T

12.0 20.0 T

32 T1

45 T1

1

2

4

8

16

25

36

2000

4000

8000

16000

32000

50000

72000

8.9

17.8

35.6

71.1

142.2

225.0

320.4

1.85

2.32

2.76

3.46

4.17

6.77

7.05

47

59

70

88

106

172

179

2.95

3.58

4.65

6.30

7.09

10.71

13.74

75

91

118

160

180

272

349

0.79

0.98

1.46

1.97

2.95

3.94

3.94

20

25

37

50

75

100

100

2.80

3.39

3.46

4.53

5.31

7.44

7.56

71

86

88

115

135

189

192

0.43

0.63

0.83

1.18

1.61

2.05

2.05

11

16

21

30

41

52

52

0.47

0.55

0.63

0.98

1.18

1.57

1.57

12

14

16

25

30

40

40

7.40

9.06

11.14

15.79

19.92

24.80

26.61

188

230

283

401

506

630

676

0.28

0.33

0.39

0.55

0.83

1.12

1.12

7.0

8.5

10.0

14.0

21.0

28.5

28.5

A

B

C

L

G

T

MH


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MB DogBone System Lifting Hardware(6265) DB-2 MB DOGBONE LIFTING BODY CHAIN LINK

1-Ton, 2-Ton, 4-Ton, 8-Ton and 16-Ton

The DB-2 MB DogBone Lifting Body Chain Link is similar to the eye link version, but utilizes a chain linkarrangement to increase the units versatility. The chain link allows the unit to be loaded in any direction. Seelifting body maintenance information on page 56.


Lifting BodyMark

Safe Work Load D L E H

Tons lbs. kN in. in. in. in.mm mm mm mm

DB-2 DogBone Lifting BoDY - WitH cHain LinK

136.53

169.88

201.63

274.65

358.78

8.625

9.875

10.125

14.125

17.325

28.58

36.53

50.80

63.50

60.91

1.125

1.438

2.003

2.50

2.398

53.98

63.50

82.55

104.78

139.70

2.125

2.500

3.250

4.125

5.5000

41.28

60.33

61.93

100.00

120.65

1.625

2.375

2.438

3.938

4.750

8.9

17.8

35.6

71.1

142.2

2000

4000

8000

16000

32000

1

2

4

8

16

11.3 T

1.52.5 T

3.05.0 T

6.010.0 T

12.0 20.0 T


H

D

L E

68



MB DogBone System Lifting Hardware

The DB-3 MB DogBone Lifting Body Eye Link is designed with a T shaped slot in the body of the lifterthat engages the head of a DogBone Anchor. Attached to the main body is the solid plate eye link. It rotatesabout a pin in the main body so rigging does not have to be reversed when rotating a panel. See lifting bodymaintenance information on page 56.

(6260) DB-3 MB DOGBONE LIFTING BODY EYE LINK1-Ton, 2-Ton, 4-Ton, 8-Ton and 16-Ton


Lifting BodyMark

Safe Work Load W D C L E H S T

Tons lbs. kN in. in. in. in. in. in. in. in.mm mm mm mm mm mm mm mm

DB-3 DogBone Lifting BoDY Lifting BoDY WitH LinK

11.3 T

1.52.5 T

3.05.0 T

6.010.0 T

12.0 20.0 T

1

2

4

8

16

2000

4000

8000

16000

32000

8.9

17.8

35.6

71.1

142.2

2.500

3.500

3.938

5.813

7.313

34.14

39.70

57.15

73.03

114.30

1.344

1.563

2.250

2.875

4.500

11.13

17.48

22.23

29.59

41.28

.438

.688

.875

1.165

1.625

136.53

169.88

201.63

274.65

358.78

5.375

6.688

7.938

10.813

14.125

28.58

36.53

50.80

63.50

60.91

1.125

1.438

2.0002

2.500

2.398

53.98

63.50

82.55

104.78

139.70

2.125

2.500

3.250

4.125

5.5000

44.45

47.63

65.10

76.20

112.73

41.28

60.33

61.93

100.00

120.65

1.750

1.875

2.563

3.000

4.438

1.625

2.375

2.438

3.938

4.750

63.50

88.90

100.00

147.65

185.75


L E

WD

ST

H

C

EYE

LINK

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MB DogBone System Recess Formers(6275) DB-5 MB DOGBONE RECESS FORMER

1-Ton, 2-Ton, 4-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-5 DogBone Recess Former is a reusable unit furnishedwith a threaded stud and wing nut. The threaded stud extendsthrough the form and the accompanying wing nut secures theunit to the form. Removal of the form is required to expose theembedded anchor. See installation information on page 56.

(6277) DB-6 MB DOGBONE THREAD BOLT/PLATE

The DB-6 DogBone Thread Bolt/Plate is anavailable replacement for the threaded studof the DB-5 DogBone Recess Former, shownabove.

H C

DR

F

In mm

DAnchor Shank Diameter

In mm

HAnchor Head Diameter

In mm

FAnchor Foot Diameter

In mm

CCover

In mm

Diameter of RecessFormer

In mm

Height of RecessFormer (R)

DogBoneAnchorSize

DB-5 ancHoR & ReceSS foRMeR DiMenSionaL Data cHaRt

1-3/16

1-9/16

1-7/8

2-5/16

2-5/16

3-1/8

3-1/8

60

75

95

120

120

162

162

2-3/8

3

3-3/4

4-3/4

4-3/4

6-3/8

6-3/8

30

37

47

59

59

80

80

10

11

15

15

15

15

15

3/8

7/16

9/16

9/16

9/16

9/16

9/16

25

35

50

60

70

85

98

1

1-3/8

2

2-3/8

2-3/4

3-3/8

3-7/8

19

26

36

47

47

70

70

3/4

1 1/32

1-7/16

1-7/8

1-7/8

2-3/4

2-3/4

10

14

20

24

28

34

39

3/8

9/16

3/4

15/16

1-1/8

1-3/8

1-1/2

1 Ton

2 Ton

4 Ton

6 Ton

8 Ton

12 Ton

16 Ton


DB-6

70



MB DogBone System Recess Formers(6280) DB-10 MB DOGBONE RECESS FORMER STEEL

1-Ton, 2-Ton and 4-Ton

The DB-10 DogBone Recess Former Steel is designed for multipleuse steel forms. A single threaded bolt firmly positions and holds therecess former to the form. See installation information on page 56.

To Order, Specify: quantity, name and system size.

(6282) DB-11 MB DOGBONE RECESS GROMMET1-Ton, 2-Ton and 4-Ton

The DB-11 DogBone Recess Grommet is used with the DB-10DogBone Recess Former Steel to hold and seal the head of theDogBone Anchor in the recess former.


(6290) DB-18 MB DOGBONE RECESS FORMER NARROW W/STUD1-Ton, 2-Ton, 4-Ton, 6-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-18 DogBone Recess Former Narrow W/Stud is a reusable unitfurnished with a threaded stud and wing nut. The threaded stud extendsthrough the form and the accompanying wing nut secures the unit to theform. Removal of the form is required to expose the embedded anchor.See recess former dimensions on next page. See installation informationon page 56.


(6285) DB-15 MB DOGBONE RECESS FORMER MAGNETIC(6286) DB-16 MB DOGBONE RECESS FORMER MAGNETIC

1-Ton, 2-Ton and 4-Ton

The DB-15 and DB-16 DogBone Recess Former - Magnetic are avail-able for quick and easy reusable applications where steel precastforms are being used. The only difference in the two models is the DB-15 has three magnets and the DB-16 has six magnets for increasedholding strength.


DB-15

DB-16

71



Do

g B

on

e

MB DogBone System Recess Formers

(6295) DB-22 MB DOGBONE RECESS FORMER W/INSIDE THREADS1-Ton, 2-Ton, 4-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-22 DogBone Recess Former W/Inside Threads is a reusable unit that utilizes aremovable DB-25 Star Stud to fasten it to the form. By simply removing the threadedstud after the concrete has set will allow the precast unit to be removed from the formand expose the recess former. See DB-25 Star Stud on page 72.

(6300) DB-24 MB DOGBONE THREADED NUT1-Ton, 2-Ton, 4-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-24 DogBone Threaded Nut is available as a replacement part for useon DB-19 Recess Former Narrow W/Threaded Hole and DB-22 RecessFormer W/Inside Threads.


All other dimensions are the same

as the standard DogBone Recess

Former.

(6292) DB-19 MB DOGBONE RECESS FORMER NARROW W/THREADED HOLE 1-Ton, 2-Ton, 4-Ton, 6-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-19 DogBone Recess Former NarrowW/Threaded Hole is a reusable unit that utilizes theremovable DB-25 Star Stud to fasten it to the form.By simply removing the threaded stud after the concrete has set will allow the precast unit to be removed from the form and expose the recessformer. See DB-25 Star Stud on page 72.


DogBoneAnchor Size

W RecessFormer Dim.in. in.mm mm

T RecessFormer Dim.

in. mm

Diameter of Recess Former

in. mm

Height of Recess Former (R)DogBoneAnchorSize

DB-22 ancHoR & ReceSS foRMeR DiMenSionaL Data cHaRt

DB-19 SLIM RECESS FORMERS

1 Ton

2 Ton

4 Ton

6 Ton

8 Ton

12 Ton

16 Ton

60

75

95

120

120

162

162

2-3/8

3

3-3/4

4-3/4

4-3/4

6-3/8

6-3/8

1-9/16

2

2-3/4

3-3/8

3-3/8

5

5

40

50

70

85

85

125

125

1 Ton

2 Ton

4 Ton

6 Ton

8 Ton

12 Ton

16 Ton

2-3/8

3

3-3/4

4-3/4

4-3/4

6-3/8

6-3/8

60

75

95

120

120

162

162

1-3/16

1-9/16

1-7/8

2-5/16

2-5/16

3-1/8

3-1/8

30

37

47

59

59

80

80


W

T

72



MB DogBone System Accessories(6305) DB-25 MB DOGBONE STUD

1-Ton, 2-Ton, 4-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-25 DogBone Stud is available for use with DB-19 Recess Former Narrow W/ThreadedHole and DB-22 Recess Former W/Inside Threads. It has one fixed wing nut and one free-runningwing nut for easy attachment to the recess former and to draw the recess form tight to the form.


(6310) DB-26 MB DOGBONE WING NUT1-Ton, 2-Ton, 4-Ton, 8-Ton, 12-Ton and 16-Ton

The DB-26 DogBone Wing Nut is available as a system replacement part.


(6325) DB-31 MB DOGBONE SHEAR BAR ANCHOR(6330) DB-33 MB DOGBONE SHEAR BAR CUP

1-Ton, 2-Ton, 4-Ton, 6-Ton and 8-Ton

The DB-31 DogBone Shear Bar Anchor and DB-33 DogBone Shear Bar Cup are used in con-junction with the DB-52 DogBone Anchor when performing an edge lift. Without the shear bars,the lifting stress may be applied to the concrete above the anchor and cause concrete spalling.The properly installed shear bars transfer the lifting stress back into the anchor and the lowerconcrete, thus preventing the spalling.


H

H

A B AANCHOR SHEAR BAR

.375 DEFORMED WIRECUP SHEAR BAR

H = 1/2 SLAB +1/2 ANCHORWIDTH - 3/4"(FOR 3/4"CLEARANCE)

mm

AnchorRatedLoad

Slab Thickness

in.

A B

in. mm in.

H (Height) Deformed WireDia.mm in. mm in. mm

AnchorRatedLoad

Slab Thickness A B H (Height) Deformed WireDia. Din. mm in. mm in. mm in. mm in. mm

DB-33 cUp SHeaR BaR Data

1T

2T

2T

4T

6T

8T

5

5

6

7-1/2

7-1/2

10

125

125

150

188

188

250

8

8

10

12

12

14

200

200

250

300

300

400

2-3/8

3

3

3-3/4

4-3/4

4-3/4

60

75

75

94

119

119

3-11/16

4

4-1/2

5-5/8

6-1/8

7-3/8

92

100

113

141

153

185

9.5

9.5

9.5

9.5

9.5

9.5

.375

.375

.375

.375

.375

.375

DB-31 ancHoR SHeaR BaR Data

1T

2T

2T

4T

6T

8T

125

125

150

188

188

250

5

5

6

7-1/2

7-1/2

10

8

8

10

12

12

14

200

200

250

300

300

400

1/2

11/16

11/16

7/8

1-1/16

1-1/4

13

17

17

22

27

31

1-15/16

2-1/8

2-5/8

3-7/16

3-1/2

4-7/8

49

54

66

87

89

124

.375

.375

.375

.375

.375

.375

9.5

9.5

9.5

9.5

9.5

9.5

A

AB

DB-25

DB-26

3 PC MB Dogbone

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