Geostructural Solutions - Nucor Skyline Library/Document... · Micropile threaded casing production capacity has been expanded to further supplement our full line of bar reinforcing

Geostructural Solutions

About Nucor Skyline

Nucor Skyline, your true project partnerWe are a premier steel foundation manufacturer and supplier, serving the North American market. Skyline Steel, LLC is a Nucor company, the largest producer of steel in the United States, and this relationship strengthens our ability to service our customers and the industry.

• Over 20 Sales Offices in North America

• Manufacturing, Coating and Fabrication Expertise

• Dozens of Stocking Locations

• Exclusive Engineering Support

Our flagship products include an unparalleled assortment of:

• H-Piles • Geostructural Products

• Steel Sheet Piles • Structural Sections

• Pipe Piles • Piling Accessories

Nucor Skyline’s knowledgeable engineering team works with owners, engineers, and contractors long before ground is broken. To ensure seamless project coordination and completion, our engineers propose solutions throughout all aspects of design, material selection, installation, and construction sequencing. Skyline’s engineering support is extended even further to include provision of onsite assistance after a project has started. Our relationships extends beyond sales – we are your true project partner.

As a premier supplier and manufacturer of steel foundation products, we are proud to offer our comprehensive line of geostructural products. Nucor Skyline’s geostructural business unit has become a leader in the supply side of the heavy civil construction business.

We have a core group of geostructural industry specialists dedicated to providing superior service to this growing market. A significant investment in manufacturing has been made which allows us to continue to add new product lines and strengthen our existing product offering. In addition to Nucor Skyline’s complete line of grade 75 and grade 150 cold rolled threaded bar, we offer an improved hot rolled threaded bar. Our manufacturing capabilities have also been expanded to allow us to produce DCP shop grouted and SCP ground anchors in multiple locations across the United States. Nucor Skyline’s experienced production team are experts at assembling large-scale reinforcement bar cages, using couplers and full load nuts, measuring over 65 feet long.

Significant improvements have also been made in our micropile manufacturing capabilities. Micropile threaded casing production capacity has been expanded to further supplement our full line of bar reinforcing products, making us the single source supplier to any contractor involved in a micropile project. Multi-strand anchors, featuring Samwoo load distributive anchor systems with removable capabilities, are exclusively available from Nucor Skyline. A comprehensive hollow bar system with a full line of complementary accessories has also been added to our geostructural product offering. Nucor Skyline is pleased to be a market leader in the specialty products described in this brochure and we are dedicated to partnering with our customers and delivering high quality products and cost effective solutions.

Table of Contents

PRODUCT DATA

Cold Rolled Threaded Bars . . . . . . . . . 2

Hot Rolled Threaded Bars . . . . . . . . . 10

Hollow Bar Systems . . . . . . . . . . . . . . 12

Threaded Casing for Micropiles . . . . 18

Multi-Strand Anchor Systems . . . . . . 20

PRODUCT DETAIL

Hollow Bar Systems . . . . . . . . . . . . . . 16

Multi-Strand Anchor Systems . . . . . . 21

TYPICAL GEOSTRUCTURAL APPLICATIONS

Ground Anchors . . . . . . . . . . . . . . . . . 26

Rock Bolts/Anchor Bolts . . . . . . . . . . 31

Soil Nails . . . . . . . . . . . . . . . . . . . . . . . 32

Tie Rods . . . . . . . . . . . . . . . . . . . . . . . 34

Micropiles . . . . . . . . . . . . . . . . . . . . . . 46

Pile Reinforcement . . . . . . . . . . . . . . 48

Geostructural Solutions from Nucor Skyline

2 Nucor Skyline: Geostructural Solutions Please note: As we continuously improve the design of our products, product details are subject to change.

Cold Rolled Threaded Bars†

Threaded Bars and Accessories

† Contact your sales representative for information on hot dip galvanized and epoxy coated bars.

Bar Designation

Nominal Diameter

inmm

GradeMin. Net Area Thru Threads

in2

mm2

Min. Ultimate Strength

kipskN

Min. Yield Strength

kipskN

Nominal Weight

lbs/ftkg/m

Approx. Major Thread Diameter

inmm

Thread Orientation

Max. Length

ftm

#8 1 25

75 0.790510.0

79.0351.4

59.3263.8

2.704.0

1.12528.5

Left Hand 6018.3

80 0.790510.0

83.0369.2

63.2281.1

2.704.0

1.12528.5

Left Hand 6018.3

#9 1 1/8 28

75 1.000645.0

100.0444.8

75.0333.6

3.405.1

1.25032.0

Left Hand 6018.3

80 1.000645.0

105.0467.1

80.0355.9

3.405.1

1.25032.0

Left Hand 6018.3

#10 1 1/432

75 1.270819.0

127.0564.9

95.3423 .9

4.306.4

1.37535.0

Left Hand 6018.3

80 1.270819.0

133.4593.4

101.6451.9

4.306.4

1.37535.0

Left Hand 6018.3

#11 1 3/8 35

75 1.5601006.0

156.0694.0

117.0520.5

5.307.9

1.50038.1

Left Hand 6018.3

80 1.5601006.0

163.8728.6

124.8555.1

5.307.9

1.50038.1

Left Hand 6018.3

#14 1 3/4 45

75 2.2501452.0

225.01000.9

168.7750.4

7.6511.4

1.87547.6

Right Hand 6018.3

80 2.2501452.0

236.31051.1

180.0800.7

7.6511.4

1.87547.6

Right Hand 6018.3

#18 2 1/455

75 4.0002581.0

400.01779.4

300.01334.5

13.6020.2

2.438 62.0

Right Hand 6018.3

80 4.0002581.0

420.01868.2

320.01423.4

13.6020.2

2.438 62.0

Right Hand 6018.3

#20 2 1/264

75 4.9103168.0

491.02184.0

368.01637.0

16.6924.8

2.75070.0

Right Hand 6018.3

80 4.9103168.0

515.62293.5

392.81747.3

16.6924.8

2.75070.0

Right Hand 6018.3

#24 376

75 7.0704561.0

707.03142.0

530.02356.0

24.1035.9

3.250 82.6

Right Hand 6018.3

80 7.0704561.0

742.43302.3

565.62515.9

24.1035.9

3.250 82.6

Right Hand 6018.3

#28 3 1/2 89

75 9.6106200.0

960.04274.0

720.03206.0

32.7048.7

3.75095.3

Right Hand 6018.3

80 9.6106200.0

1009.14488.7

768.83419.8

32.7048.7

3.75095.3

Right Hand 6018.3

Cold rolled threaded bars conform to the physical and chemical requirements of ASTM A 615 Grade 75 ksi “Standard Specification for Deformed Carbon Steel Bars for Concrete Reinforcement”* Contact your local Nucor Skyline representative for information on additional steel grades.

Approx. MajorThread Diameter

Nucor Skyline: Geostructural Solutions 3Please note: As we continuously improve the design of our products, product details are subject to change.

Cold Rolled Threaded Bars†




Nominal Diameter

inmm

GradeMin. Net Area Thru Threads

in2

mm2


kipskN

Min. Yield Strength

kipskN

Nominal Weight

lbs/ftkg/m


inmm

Thread Orientation

Max. Length

ftm

126

150 0.850549

128567

102454

3.14.6

1 1/828.6

Left Hand 6018.3

1 1/432

150 1.250807

188834

150667

4.56.7

1 1/238.1

Left Hand 6018.3

1 3/836

150 1.5801019

2371054

190843

5.78.5

1 5/841.3

Left Hand 6018.3

1 3/446

150 2.6001677

3901735

3201423

9.113.5

250.8

Left Hand 6018.3

2 1/457

150 4.0002581

6002669

4802135

13.620.2

2 7/1662.0

Left Hand 6018.3

2 1/265

150 5.1903350

7783457

6222766

18.327.2

2 3/469.9

Left Hand 6018.3

375

150 7.0604554

10594702

8473766

24.035.7

3 1/482.6

Left Hand 6018.3

1 inch to 1 3/8 inch diameter, ASTM A 722; 1 3/4 inch to 3 inch diameter bar manufactured in accordance with ASTM A 722 physical and chemical requirements. Grade 150 ksi steel must not be subjected to localized heating such as welding, cutting torch, or hot grinding.


Cold Rolled Threaded Bar Accessories†


L

OD

Full Load Hex Nut Jam Nut

A B A C


Threaded Bar Connectors

Grade 75 Bar

Bar Designation

OD

inmm

L

inmm

Weight

lbskg

#81.62541.3

4.500114.3

1.550.70

#91.87547.6

5.000127.0

2.391.08

#102.12554.0

5.500139.7

3.471.57

#112.25057.2

6.000152.4

4.021.82

#142.87573.0

7.875200.0

9.164.15

#183.50088.9

9.125231.8

13.936.32

#204.000101.6

9.500241.3

19.869.01

#244.750120.6

10.750243.0

31.0114.07

#285.500139.7

12.000304.8

46.2020.96

Grade 150 Bar

Nominal Diameter

inmm

OD

inmm

L

inmm

Weight

lbskg

126

1.75044.5

4.250108.0

1.700.77

1 1/432

2.12554.0

5.250133.4

3.111.41

1 3/836

2.37560.3

5.750146.1

4.221.91

1 3/446

3.00076.2

8.500215.9

9.984.53

2 1/457

4.000101.6

9.000228.6

21.459.73

2 1/265

4.250108.0

10.000254.0

23.9610.87

375

5.000127.0

12.000308.0

41.2418.71

Full Load Hex Nuts and Jam Nuts

Grade 75 Bar

Bar Designation

A

inmm

B

inmm

C

inmm

Weight

lbskg

Full Jam

#81.62541.3

2.00050.8

0.50012.7

0.810.37

0.200.09

#91.75044.5

2.00050.8

0.56314.3

0.890.40

0.250.11

#102.00050.8

2.18755.5

0.62515.9

1.330.60

0.380.17

#112.25057.2

2.50063.5

0.68817.5

1.960.89

0.540.24

#142.75069.9

3.25082.6

0.93823.8

3.861.75

1.110.50

#183.50089.0

3.50089.0

1.00025.4

4.872.21

1.810.82

#20*4.000101.6

4.500114.3

1.12528.6

9.834.46

2.761.25

#24**4.750120.6

4.500114.3

1.50038.1

12.985.89

4.331.96

#28**5.500139.7

6.000152.4

1.56339.7

23.1010.48

6.022.73

*Round collar nut available **Round collar nut with flats

Grade 150 Bar

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

Weight

lbskg

Full Jam

126

1.75044.5

2.00050.8

0.50012.7

0.940.43

0.230.10

1 1/432

2.25057.2

2.50063.5

0.62515.9

2.070.94

0.520.24

1 3/836

2.50063.5

2.75069.9

0.75019.1

2.781.26

0.750.34

1 3/446

3.00076.2

3.50088.9

1.25031.8

4.832.19

1.700.77

2 1/457

4.000101.6

4.250107.95

1.50038.10

11.685.30

4.091.86

2 1/265

4.000101.6

4.750120.7

1.75044.45

10.824.91

3.991.81

375

5.000127.0

6.000152.4

2.00050.8

20.629.35

5.112.32


Cold Rolled Threaded Bar Accessories

Contact your local Nucor Skyline representative for information on additional grades of steel.

AB C

A C

BEVEL

D

B


Hardened Washers

Grade 75 Bar

Bar Designation A

inmm

B

inmm

C

inmm

Weight

lbskg

#82.25057.150

1.18830.175

0.1363.454

0.1100.05

#92.50063.500

1.37534.925

0.1363.454

0.1300.06

#102.75069.850

1.53138.887

0.1363.454

0.1600.07

#113.00076.200

1.62541.275

0.1363.454

0.1900.09

#143.750

95.2502.125

53.9750.1784.521

0.3800.17

#184.500114.300

2.65767.488

0.2406.096

0.7100.32

#205.500

139.7003.15780.188

0.2406.096

1.0900.49

#246.000

152.4003.62592.075

0.3759.525

1.9100.87

#287.000

177.8004.125

104.7750.3759.525

2.6801.22

Grade 150 Bar

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

Weight

lbskg

126

2.50063.500

1.37534.925

0.1363.454

0.1300.06

1 1/432

2.75069.850

1.53138.887

0.1363.454

0.1600.07

1 3/836

3.25082.550

1.77044.958

0.1784.521

0.3000.13

1 3/446

4.000101.600

2.40761.138

0.2406.096

0.5500.25

2 1/457

4.500114.300

2.65767.488

0.2406.096

0.7100.32

2 1/265

5.500139.700

3.15780.188

0.2406.096

1.0900.49

375

6.000152.400

3.62592.075

0.3759.525

1.9100.87

Round Beveled Washers

Grade 75 Bar

Bar Designation

A

inmm

B

inmm

C

inmm

D

inmm

Bevel

degreesWeight

lbskg

#81.75

44.451.13

28.580.4611.68

0.174.32

9.40.210.10

#92.6366.68

1.3831.75

0.9323.62

0.235.84

150.690.31

#102.75

69.851.6341.40

0.9724.64

0.235.84

150.660.30

#113.0978.49

1.7544.45

1.0626.92

0.235.84

150.930.45

#144.00

101.602.1354.10

1.2932.77

0.235.84

151.940.88

#184.60

116.842.63

66.801.18

29.970.379.40

102.461.12

#205.00

127.003.0076.20

1.3133.27

0.4310.92

103.101.41

#248.00

203.203.5088.90

1.7544.45

0.4310.92

1012.585.71

#288.00

203.204.00

101.602.2557.15

0.8421.34

1016.547.50

Grade 150 Bar

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

D

inmm

Bevel

degreesWeight

lbskg

126

2.6366.68

1.2531.75

0.9323.62

0.235.84

150.690.31

1 1/432

2.7569.85

1.6341.40

0.9724.64

0.235.84

150.660.30

1 3/836

3.0978.49

1.7544.45

1.0626.92

0.235.84

150.930.42

1 3/446

4.00101.60

2.1354.10

1.2932.77

0.235.84

151.940.88

2 1/457

4.60116.84

2.6366.80

1.1829.97

0.379.40

102.461.12

2 1/264

5.00127.00

3.0076.20

1.3133.27

0.4310.92

103.101.41

375

8.00203.20

3.5088.90

1.7544.45

0.4310.92

1012.585.71




Bearing Plates

Bearing plate dimensions reflect typical sizes. Actual design criteria should be used for specific plate sizing.

Grade 75 Bar

Bar Designation

A

inmm

B

inmm

C

inmm

Weight

lbskg

#88

203.208

203.203/4

19.0513.406.08

#98

203.208

203.203/4

19.0513.356.06

#108

203.208

203.201

25.4017.738.04

#1110

254.0010

254.001

25.4027.8612.64

#1410

254.0010

254.001 1/2

38.1041.3718.76

#1810

254.0010

254.002

50.8054.2124.59

#2010

254.0010

254.002 1/2

63.5067.0630.42

#2410

254.0010

254.002 1/2

63.5065.4629.69

#2812

304.8012

304.802 3/4

69.85104.2647.29

Grade 150 Bar

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

Weight

lbskg

126

6152.4

6152.4

1 1/431.8

12.765.79

1 1/432

7177.8

7177.8

1 1/238.1

20.849.45

1 3/836

8203.2

8203.2

1 3/444.5

31.7614.41

1 3/446

9228.6

9228.6

1 3/444.5

40.2018.23

2 1/457

10254.0

10254.0

2 1/263.5

70.8932.16

2 1/265

10254.0

10254.0

2 1/263.5

70.8932.16

375

12304.8

12304.8

2 3/469.9

112.3150.94

Anchor Nuts†

Grade 150 Anchor Nuts

Diameter

inmm

A

inmm

L

inmm

N

inmm

Weight

lbskgs

126

1.75044.5

2.360 59.9

2.4562.2

1.440.65

1 1/432

2.125 54.0

3.12579.5

3.1580.0

3.03 1.37

1 3/836

2.375 60.3

3.37585.9

3.588.9

4.05 1.84

1 3/446

3.000 76.2

4.000101.6

4.2106.7

7.05 3.20

2 1/457

4.250 108.0

5.500139.7

5.6142.2

20.24 9.18

† Consult your sales representative for availability of additional threads and grades.

HDPE Plastic Nut Caps*

Plastic Nut Caps for Grade 75 Bars

Bar Designation

A

inmm

B

inmm

C

inmm

#8 – #113.588.9

2.2557.2

6.75171.5

#14 – #286.5165.1

4.25108.0

10.25260.4

Plastic Nut Caps for Grade 150 Bars

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

1 – 1 3/826 – 36

3.588.9

2.2557.2

6.75171.5

1 3/4 – 346 – 75

6.5165.1

4.25108.0

10.25260.4

* “O” ring seal in base of cap.

B

A

C

A

L

N

SECTION B

SECTION BB

C

ASECTION A

SECTION A



All threaded bars can be supplied with a protective smooth-walled PVC tube. While the standard PVC tube is 0.035 inch thick, other options are available upon request.

The following additional corrosion protection options are available for all threaded bars:

Single Corrosion Protection (SCP)

Double Corrosion Protection (DCP)

• Encapsulating: Grease or Grout • Epoxy Coating• Galvanizing• Painting• Plating• Taping

Oversized accessories are provided to accommodate galvanized and coated bars.

Please contact your Nucor Skyline Geostructural Solutions Representative for recommendations on the system that will best suit your requirements.

Corrosion Protection


Forged Eye

Bar Designation

A

inmm

B

inmm

C

inmm

D

inmm

E

inmm

F

inmm

#146.1155

2.563

2.460

19.9505

8.1207

2.050

#186.1155

2.563

2.460

19.9505

8.1207

2.050

#207.1

1803.076

3.076

20.5520

9.8248

2.563

#247.1

1803.076

3.076

20.5520

9.8248

2.563

#289.2230

3.588

3.590

22.2565

12.3312

3.075

Threads on forged eye will be metric. Conversion couplers available (transition) for all Nucor Skyline thread forms.

Contact your Nucor Skyline sales representative for assistance with connection details.

Transitional Coupler for Forged Eye

Bar Designation

OD

inmm

L

inmm

X

inmm

Y

inmm

Weight

lbkg

M56 – #143.5088.90

9.8248.92

4.00101.6

4.57116.0

18.48.4

M56 – #183.5088.90

9.8248.92

4.00101.6

4.57116.0

15.67.1

M72 – #204.75

120.6512.0

304.805.38136.5

5.38136.5

39.217.8

M72 – #244.75

120.6512.0

304.805.38136.5

5.38136.5

34.915.8

M85 – #285.50

139.7013.3

337.826.00152.4

6.00152.4

48.522.0

D

E

F

A

B

C

Threaded Portion

Threaded Portion

MetricThread Form

X

OD

LY

Skyline SteelThread Form



Tie Bars without Articulation

Normal End Threads Upset Forged Threads

Bar

Thread Diameter

Shaft Diameter

Thread ShaftRecommended

Design CapacityTensile Stress Area

Yield Capacity

Ultimate Capacity

Gross Area

Yield Capacity

Ultimate Capacity

DT

Dg

As

Thy

Thu

Ag

Shy

Shu

ASD* LRFD*

inmm

inmm

in2

mm2

kipskN

kipskN

in2

mm2

kipskN

kipskN

kipskN

kipskN

M 85/643.385

2.5264

7.674948

5562474

7343266

4.993217

3621608

4772123

217963

3441528

M 90/683.590

2.6868

8.675591

6282795

8303690

5.633632

4081816

5392397

2441087

3881725

M 95/723.795

2.8372

9.726273

7053137

9314140

6.314072

4582036

6042687

2741219

4351934

M 100/763.9100

2.9976

10.846995

7863497

10384616

7.034536

5102268

6732994

3051358

4842155

M 105/804.1105

3.1580

12.027755

8723878

11515119

7.795027

5652513

7463318

3381505

5372388

M 110/854.3110

3.3585

13.268556

9624278

12695647

8.805675

6382837

8423745

3811694

6062695

M 115/904.5115

3.5490

14.569395

10564697

13946201

9.866362

7153181

9444199

4181860

6692976

M 120/904.7120

3.5490

15.9210274

11555137

15246781

9.866362

7153181

9444199

4281905

6793022

M 125/954.9125

3.7495

17.3511191

12585596

16617386

10.997088

7973544

10524678

4772122

7573367

M 130/1005.1130

3.94100

18.8312149

13666074

18038018

12.177854

8833927

11655184

5292351

8393731

M 135/1055.3135

4.13105

20.3713145

14786573

19508676

13.428659

9734330

12855715

5832593

9254113

M 140/1105.5140

4.33110

21.9814181

15947090

21049359

14.739503

10684752

14106272

6312808

10104492

M 145/1105.7145

4.33110

23.6515256

17157628

226410069

14.739503

10684752

14106272

6402845

10154514

M 150/1155.9150

4.53115

25.3716370

18408185

242910804

16.1010387

11685193

15416855

6993110

11094934

M 155/1206.1155

4.72120

27.1617524

19708762

260011566

17.5311310

12715,655

16787464

7613386

12085372

M 160/1256.3160

4.92125

29.0118716

21049358

277712353

19.0212272

13796,136

18218099

8263674

13105829

M 165/1306.5165

5.12130

30.9219948

22429974

296013166

20.5713273

14926637

19698760

8883950

14176305

*The recommended design capacities are based on AISC/ASD and AASHTO/LRFD design methodologies for steel structures and retaining walls. Additional reduction factors from EN1993-5 are applied to the tie rods based on their ability to articulate.



Tie Bars with Articulation

Forged Eye Threaded and Spherical NutForged Spherical End

Bar

Thread Diameter

Shaft Diameter



Yield Capacity

Ultimate Capacity

Gross Area

Yield Capacity

Ultimate Capacity

DT

Dg

As

Thy

Thu

Ag

Shy

Shu

ASD* LRFD*

inmm

inmm

in2

mm2

kipskN

kipskN

in2

mm2

kipskN

kipskN

kipskN

kipskN

M 85/763.385

2.9976

7.674948

5562474

7343266

7.034536

5102268

6732994

3051358

4842155

M 90/803.590

3.1580

8.675591

6282795

8303690

7.795027

5652513

7463318

3381505

5372388

M 95/853.795

3.3585

9.726273

7053137

9314140

8.805675

6382837

8423745

3821699

6062695

M 100/903.9100

3.5490

10.846995

7863497

10384616

9.866362

7153181

9444199

4281905

6793022

M 105/954.1105

3.7495

12.027755

8723878

11515119

10.997088

7973544

10524678

4772122

7573367

M 110/1004.3110

3.94100

13.268556

9624278

12695647

12.177854

8833927

11655184

5292351

8393731

M 115/1054.5115

4.13105

14.569395

10564697

13946201

13.428659

9734330

12855715

5832593

9254113

M 120/1104.7120

4.33110

15.9210274

11555137

15246781

14.739503

10684752

14106272

6402845

10154514

M 125/1154.9125

4.53115

17.3511191

12585596

16617386

16.1010387

11685193

15416855

6993110

11094934

M 130/1205.1130

4.72120

18.8312149

13666074

18038018

17.5311310

12715655

16787464

7613386

12085372

M 135/1255.3135

4.92125

20.3713145

14786573

19508676

19.0212272

13796136

18218099

8263674

13105829

M 140/1305.5140

5.12130

21.9814181

15947090

21049359

20.5713273

14926637

19698760

8933974

14176305

M 145/1355.7145

5.31135

23.6515256

17157628

226410069

22.1914314

16097157

21249447

9634286

15286799

M 150/1405.9150

5.51140

25.3716370

18408185

242910804

23.8615394

17307697

228410160

10364609

16447312

M 155/1456.1155

5.71145

27.1617524

19708762

260011566

25.6016513

18568256

245010899

11114944

17637844

M 160/1506.3160

5.91150

29.0118716

21049358

277712353

27.3917671

19868836

262211663

11895291

18878394

M 165/1556.5165

6.10155

30.9219948

22429974

296013166

29.2518869

21219435

280012454

12705649

20158963

*The recommended design capacities are based on AISC/ASD and AASHTO/LRFD design methodologies for steel structures and retaining walls. Additional reduction factors from EN1993-5 are applied to the tie rods based on their ability to articulate.



Hot Rolled Threaded Bars†


Hot Rolled Threaded Bar – Grade 75/100 – ASTM A 615

Bar Designation

GradeNominal Diameter

inmm

Min. Net Area Thru Threads

in2

mm2


kipskN

Min. Yield Strength

kipskN

Nominal Weight

lbs/ftkg/m


inmm

Thread Orientation

Max. Length

ft(m)

#6 753/420

0.44284.00

44196

33147

1.52.24

0.8621.8

Left Hand6018

#7 757/822

0.60387.00

60267

45200

2.043.04

0.9925.1

Left Hand6018

#8 751

250.79

510.0079351

59.3264

2.673.98

1.1228.4

Left Hand6018

#9 751-1/828

1.00645.00

100449

75333

3.45.06

1.2632

Left Hand6018

#10 751-1/432

1.27819.00

127565

95.3423

4.36.41

1.4336.3

Left Hand6018

#11 751-3/8

351.56

1006.00156694

117520

5.317.91

1.6140.9

Left Hand6018

#14

751-3/4

452.25

1452.002251001

168.8751

7.6511.39

1.8647.2

Right Hand6018

1001-3/4

452.25

1452.002591152

2251001

7.6511.39

1.8647.2

Right Hand6018

Hot rolled threaded bars conform (Excluding the requirement of: “legibly rolled surface markings.”) to the requirements of ASTM A 615 Grade 75 ksi (520 Mpa) “Standard Specification for Deformed Carbon Steel Bars for Concrete Reinforcement” † Contact your sales representative for information on hot dip galvanized and epoxy coated bars.



Hot Rolled Threaded Bar Accessories

* Dimension of nuts and couplers are for standard thread sizes. Contact your local Nucor Skyline representative for coated or galvanized bars values.

Couplers

Grade 75 – ASTM A 576, A 108

Bar Designation

Nominal Diameter

inmm

OD

inmm

L

inmm

Weight

lbskg

#63/420

1.2531.75

3.12579.37

0.620.28

#77/822

1.5038.10

3.7595.25

0.930.42

#81

251.62541.27

4.00101.60

1.370.62

#91 1/828

1.87547.62

5.00127.00

2.311.05

#101 1/432

2.0050.80

5.75146.05

2.771.26

#111 3/835

2.2557.15

6.40162.56

3.791.72

#141 3/445

2.8873.15

7.85192.53

5.492.49

Hex Nuts (Full Load and Jam Nuts)

Grade 75 – ASTM A 576, A 108

Bar Designation

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

Weight

lbskg

Full Jam

#63/420

1.12528.57

1.4536.83

0.8722.10

0.260.12

0.160.07

#77/822

1.37534.92

1.7544.45

0.8722.10

0.430.20

0.210.10

#81

251.5038.10

2.5063.50

0.8722.10

0.560.25

0.260.12

#91 1/828

1.7544.45

2.2557.15

0.8722.10

0.970.43

0.370.17

#101 1/432

2.0050.80

2.5063.50

1.0025.40

1.430.65

0.560.25

#111 3/835

2.2557.15

2.7569.85

1.0025.40

1.520.69

0.530.24

#141 3/445

2.5063.50

3.6091.44

1.0025.40

3.021.37

0.820.37

OD L

Jam NutHex Nut

A AB C

Hardened Washers

Grade 75 – ASTM F 436

Bar Designation

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

Weight

lbskg

#63/420

1.7544.45

0.93823.83

.1363.45

0.070.03

#77/822

2.0050.80

1.06327.00

.1363.45

0.090.04

#81

252.2557.15

1.18830.18

.1363.45

0.110.05

#91 1/828

2.5063.50

1.37534.92

.1363.45

0.130.06

#101 1/432

2.7569.85

1.53138.89

.1363.45

0.160.07

#111 3/835

3.0076.20

1.62541.27

.1363.45

0.190.09

#141 3/445

3.2582.55

1.7744.96

.1784.52

0.300.14

AB C

Beveled Washers

Grade 75 – F 436, A536 80-55-06

Bar Designation

Nominal Diameter

inmm

A

inmm

B

inmm

C

inmm

D

inmm

Bevel

degreesWeight

lbskg

#63/420

1.7544.45

.9524.13

.7819.81

.328.13

15.320.15

#77/822

1.7544.45

1.1428.96

.7819.81

.328.13

15.370.17

#81

251.75

44.451.14

28.96.78

19.81.235.84

15.370.17

#91 1/828

2.6366.80

1.3831.75

.9323.62

.235.84

15.64

0.29

#101 1/432

2.7569.85

1.6341.40

.9724.64

.235.84

15.660.30

#111 3/835

3.0978.49

1.7544.45

1.0626.92

.235.84

15.930.45

#141 3/445

4.0010.16

2.1354.10

1.2932.77

.235.84

151.940.88

D

CA

A

BB

A


Commercial Grade Hollow Bar

Hollow Bar and Accessories

“R” Threaded Hollow Bar

Bar Designation

Nominal Outer Diameter

inmm

Average Inner Diameter

inmm

Effective Outer Diameter

inmm

Cross Sectional Area

in2

mm2

Ultimate Load

kipskN

Yield Load

kipskN


inmm

Nominal Weight

lbs/ftkg/m

R32S1.26 32

0.63 16

1.15 29.1

0.76 488

81 360

62 275

1.38 35

2.700 4.00

R38Nx19mm ID1.50 38

0.75 19

1.41 35.7

1.11 717

112 498

86 382

1.62 41

3.415 5.08

R51N2.01 51

1.30 33

1.88 47.8

1.46 939

177 787

141 627

2.13 54

5.700 8.50

“T” Threaded Hollow Bar Systems

Bar Designation


inmm


inmm


in2

mm2

Ultimate Load

kipskN

Yield Load

kipskN


inmm

Nominal Weight

lbs/ftkg/m

T30/111.18 30

0.43 11

0.64 413

72.0 320

58.5 260

1.30 33

2.2 3.3

T40/201.57 40

0.79 20

1.13 726

121.4 540

95.6 425

1.70 43.2

3.8 5.6

T40/161.57 40

0.63 16

1.40 903

148.4 660

118.1 525

1.70 43.2

4.8 7.2

T52/262.0552

1.0326

1.941251

208.0925

170.0756

2.2055.9

6.79.9

T76N3.00 76

2.0051

3.35 2161

319.0 1418

252.0 1120

3.20 81.3

10.2 15.2

T76S3.00 76

1.77 45

4.03 2600

418.0 1859

330.0 1467

3.20 81.3

13.2 19.7

T103/784.06 103

3.00 78

4.87 3142

510.5 2270

404.8 1800

4.20 106.7

17.0 25.3

T103/514.06 103

2.00 51

8.80 5677

823.0 3660

600.4 2670

4.20 106.7

30.0 44.6







Commercial Grade Hollow Bar Accessories

Couplers

“T” Threaded Hollow Bar Couplers

Bar Designation OD

inmm

L

inmm

Weight

lbskg

T30/111.538

4.2105

1.00.45

T40/202.153

5.5140

2.61.18

T40/162.153

5.5140

2.61.18

T52/262.7

68.56.25160

5.22.36

T76N3.897

8.0200

10.24.54

T76S3.897

8.7220

14.46.53

T1035.2132

11.5292

30.513.8

“R” Threaded Hollow Bar Couplers

Bar Designation OD

inmm

L

inmm

Weight

lbskg

R32S1.743

7.5190

2.00.91

R38Nx19mm 2.564

8.7220

3.81.72

R51N2.564

8.0200

4.21.91

Centralizers

Hollow Bar Centralizers

Size OD

inmm

L

inmm

Weight

lbskg

T30

2.7570

1.4035

0.50.21

3.4088

1.4035

0.60.27

T403.4088

1.5040

0.80.37

T524.40112

1.4035

1.00.41

T765.00130

1.7545

2.00.89

T1036.40165

3.2080

6.52.94

Hex Nuts

“T” Threaded Hollow Bar Hex Nuts

Bar Designation A

inmm

B

inmm

Weight

lbskg

T30/111.8

46.01.4

36.01.0

0.45

T40/202.564.0

2.050.0

2.71.22

T40/162.564.0

2.050.0

2.61.18

T52/263.281

2.563.5

5.12.31

T76N4.0

102.03.1

80.06.22.81

T76S4.0

102.03.1

80.06.22.81

T1035.25133.0

5.125130

13.05.90

“R” Threaded Hollow Bar Hex Nuts

Bar Designation A

inmm

B

inmm

Weight

lbskg

R32S1.8

46.03.0

65.02.00.91

R38Nx19mm 2.051.0

2.060.0

1.30.59

R51N3.076.0

3.070.0

3.51.59

Size LOD

Jam NutHex Nut

A AB C



* Meets “Buy America” requirements.

Domestic Hollow Bar and Accessories

“T” Threaded Hollow Bar Systems*

Bar Designation


inmm


inmm


in2

(mm2)

Minimum Ultimate Load

kipskN

Minimum Yield Load

kipskN


inmm

Nominal Weight

lbs/ftkg/m

T40/161.5740

0.6316

1.36879

148660

118525

1.62541.3

4.97.3

T40/201.57 40

0.79 20

1.13 726

127565

95.6 425

1.7043.2

4.46.5

T52/262.0552

1.0326

2.071337

2271009

179796

2.12554.0

6.810.1

T76/513.00 76

2.0151

3.20 2065

319 1418

252 1120

3.000 76.2

11.1 16.5

T76/453.00 76

1.77 45

3.90 2516

418 1859

330 1467

3.000 76.2

13.2 19.7



Couplers

“T” Threaded Hollow Bar Couplers*

Bar Designation

OD

inmm

L

inmm

Weight

lbskg

HBC PL 402.50063.5

5.50139.7

5.102.31

HBC PL 523.125

79.3756.00152.4

11.395.17

HBC PL 7603.75

95.257.875

200.0334.8115.79

Anchor Hex Nuts

“T” Threaded Hollow Bar Anchor Hex Nuts*

Bar Designation

A

inmm

L

inmm

Weight

lbskg

HBHN 402.5063.5

2.050.8

5.872.66

HBHN 523.3585.09

3.076.2

10.044.55

HBHN 7604.00101.6

3.178.7

23.8110.80

LOD

A A

L

* Meets “Buy America” requirements.



Hollow Bar Bits

Drill Bit Adaptors

Adaptors

Weight

lbs/unit(kg/unit)

R32 x R380.200.09

R38 x R510.300.13

T30 x T400.300.13

Call for job specific quotes. Price depends on quantities.

Carbide Cross, Steel Cross Cut , and Button Bits

Bar SizesSize

inmm

Weight

lbs/unit(kg/unit)

T30 2.050.8

1.00.45

2.563.5

2.00.91

3.076.2

2.91.32

T40 2.563.5

2.00.91

3.076.2

2.91.32

3.588.9

3.51.59

4.0101.6

5.52.49

4.5114.3

7.03.18

5.0127.0

10.54.76

6.0152.4

13.05.90

T52 4.5114.3

7.03.18

5.0127.0

10.54.76

6.0152.4

13.05.90

T76 5.0127.0

10.54.76

6.0152.4

13.05.90

7.0177.8

14.56.58

8.0203.2

16.07.26

R32 2.050.8

1.00.45

2.563.5

2.00.91

3.076.2

2.91.32

R38 3.076.2

2.91.32

3.588.9

3.51.59

R51 4.0101.6

5.52.49

4.5114.3

7.03.18

5.0127.0

10.54.76

6.0152.4

13.05.90

All bits subject to availability. Call for stock quantities. Specialty bits available upon request.

16 Nucor Skyline: Geostructural Solutions

Hollow Bars

Hollow bars are fully threaded, “disposable” drill rods capable of drilling holes utilizing sacrificial bits that will advance the drill string to the required depth and then allow them to be grouted in place. This process creates the steel reinforcing portion of an anchor or pile. Hollow bar products are a valuable and multi-functional addition to the geotechnical contractor’s toolbox. They can be used as tie back or tie down anchors, rock anchors, soil nails and micropiles in a large array of challenging applications.

There are three basic types of drill bits for use with hollow bars: versatile cross cut bits in carbide or hardened steel, button bits for intact rock in carbide or hardened steel and steel stepped clay bits for cohesive soils. The selection of the drill bit type and size is based on the material that is being drilled through and the desired borehole diameter. A larger borehole diameter provides greater load carrying capacity and greater grout cover. Grout cover protects the anchor rod from corroding. Depending on the actual soil type, a 2.5 inch diameter bit can produce a 6 to 8 inch diameter grout column.

Production rates are increased through the use of hollow bar systems, as compared to traditional solid bar anchors. This is especially true when drilling through difficult conditions. In sites with low headroom, large scale drilling rigs and hole casing systems can be avoided. With drill rigs where “through the head grouting” is not available, grout swivels can be used to retrofit standard rotary percussion drills.

Hollow Bar Corrosion Protection

The level of corrosion protection is dependent on the anticipated service life of the anchor, installation methods, and the corrosion potential (aggressiveness) of the environment. The FHWA has studied the effects of installation on both galvanized and epoxy coated bars as reported in FHWA CFL/TD10-002. This study revealed epoxy coatings were both partially and completely removed at the leading edge of the screw profile and around the couplings.

The installations were constructed using hollow bars as both the drill rod and reinforcement. The effects of the removal reduced the service life of the bar substantially by creating concentrated locations for potential corrosion. As such, the designer should evaluate all possibilities when determining the level of corrosion protection required.

Hot Dipped Galvanizing

Hot dipped galvanizing is a form of galvanization and is the process of coating a base metal such as steel with molten zinc. The zinc acts as a sacrificial material to the steel. The galvanized coating is manufactured in accordance with ASTM A 53 standards and is more resistant to handling than epoxy coatings.

Sacrificial Steel

Using sacrificial steel as a form of corrosion protection requires a geotechnical evaluation of the corrosivity of the soils. The estimated loss of steel thickness is calculated and then the hollow bar is designed with the additional increase in thickness.

Product Detail: Hollow Bar Systems


Product Detail: Hollow Bar Systems

Loss of Thickness Due to Corrosion for Piles in Soil with or without Groundwater

Required design working life5 Years 25 Years 50 Years 75 Years 100 Years

in / mm

Undisturbed natural soils (sand, clay, schist, …) 0.0000.00

0.0120.30

0.0240.60

0.0350.90

0.0471.20

Polluted natural soils and industrial grounds 0.0060.15

0.0300.75

0.0591.50

0.0892.25

0.1183.00

Aggressive natural soils (swamp, marsh, peat, …) 0.0080.20

0.0391.00

0.0691.75

0.0982.50

0.1283.25

Non-compacted and non-aggressive fills (clay, schist, sand, silt, …)

0.0070.18

0.0280.70

0.0471.20

0.0671.70

0.0872.20

Non-compacted and aggressive fills (ashes, slag, …) 0.0200.50

0.0792.00

0.1283.25

0.1774.50

0.2265.75

Notes:

1. Corrosion rates in compacted fills are lower than those in non-compacted ones. In compacted fills, the figures in the table should

be divided by two.

2. The values given are only for guidance. Local conditions should be considered because they may affect the actual corrosion rate,

which can be lower or higher than the average value given in the table.

3. The values given for 5 and 25 years are based on measurements, whereas the other values are extrapolated.

Loss of Thickness Due to Corrosion for Piles in Fresh Water or in Sea Water


in / mm

Common fresh water (river, ship canal, …) in the zone of high attack (water line)

0.0060.15

0.0220.55

0.0350.90

0.0451.15

0.0551.40

Very polluted fresh water (sewage, industrial effluent, …) in the zone of high attack (water line)

0.0120.30

0.0511.30

0.0912.30

0.1303.30

0.1694.30

Sea water in temperate climate in the zone of high attack (low water and splash zones)

0.0220.55

0.0741.90

0.1483.75

0.2205.60

0.2957.50

Sea water in temperate climate in the zone of permanent immersion or in the intertidal zone

0.0100.25

0.0350.90

0.0691.75

0.1022.60

0.1383.50

Notes:

1. The highest corrosion rate is usually found at the splash zone or at the low water level in tidal waters. However, in most cases, the

highest stresses are in the permanent immersion zone.




Steel Thickness Reduction Values Due to Corrosion


Micropile Casing

External Surface Area

Total Area of Shaft


Threaded Casing for Micropile

Outside Diameter

inmm

Thickness

inmm

Inside Diameter

inmm

Weight

lbs/ftkg/m

Cross Sectional

Area

in2

cm2

Total Area of Shaft

in2

cm2

Internal Volume

ft3/ftm3/m

External Surface

Area

ft2/ftm2/m

Moment of Inertia

in4

cm4

Section Modulus

in3

cm3

5.5139.700

0.41510.541

4.670118.618

22.5633.57

6.6342.77

23.76153.28

0.120.011

1.440.44

21.57897.80

7.84128.47

6.625168.275

0.43210.973

5.761146.329

28.6042.56

8.4054.23

34.47222.40

0.180.017

1.730.53

40.491685.31

12.22200.25

7177.800

0.40810.363

6.184157.073

28.7542.79

8.4554.51

38.48248.29

0.210.019

1.830.56

46.071917.56

13.16215.65

7177.800

0.45311.506

6.094154.787

31.7047.18

9.3260.11

38.48248.29

0.200.019

1.830.56

50.162087.80

14.33234.83

7177.800

0.50012.700

6.000152.400

34.7451.70

10.2165.87

38.48248.29

0.200.018

1.830.56

54.242257.62

15.50254.00

7.625193.675

0.43010.922

6.765171.831

33.0749.21

9.7262.71

45.66294.60

0.250.023

2.000.61

63.122627.23

16.56271.31

7.625193.675

0.50012.700

6.625168.275

38.0856.67

11.1972.21

45.66294.60

0.240.022

2.000.61

71.372970.62

18.72306.76

8.625219.075

0.50012.700

7.625193.675

43.4364.63

12.7682.34

58.43376.94

0.320.029

2.260.69

105.724400.36

24.51401.65

8.625219.075

0.56214.275

7.501190.525

48.4472.09

14.2491.84

58.43376.94

0.310.029

2.260.69

116.254838.65

26.96441.79

9.625244.475

0.47211.989

8.681220.497

46.1868.73

13.5787.56

72.76469.42

0.410.038

2.520.77

142.515931.67

29.61485.22

9.625244.475

0.54513.843

8.535216.789

52.9078.73

15.55100.30

72.76469.42

0.400.037

2.520.77

160.806692.95

33.41547.49

10.75273.050

0.50012.700

9.750247.650

54.7981.54

16.10103.87

90.76585.56

0.520.048

2.810.86

211.958821.95

39.43646.14

10.75273.050

0.54513.843

9.660245.364

59.4688.49

17.47112.73

90.76585.56

0.510.047

2.810.86

228.109494.16

42.44695.46

10.75273.050

0.59515.113

9.560242.824

64.5996.12

18.98122.47

90.76585.56

0.500.046

2.810.86

245.5310219.65

45.68748.56

11.875301.624

0.58214.783

10.711272.059

70.26104.56

20.65133.21

110.75714.53

0.630.058

3.110.95

330.0413737.19

55.59910.95

12.75323.849

0.50012.700

11.750298.449

65.4897.45

19.24124.14

127.68823.71

0.750.070

3.341.02

361.5415048.31

56.71929.31

13.375339.724

0.48012.192

12.415315.340

66.1798.47

19.45125.45

140.50906.45

0.840.078

3.501.07

404.7316846.00

60.52991.74

13.375339.724

0.51413.056

12.347313.613

70.67105.17

20.77133.98

140.50906.45

0.830.077

3.501.07

430.0717900.72

64.311053.85

16406.4

0.3759.525

15.25387.35

62.6493.23

18.41118.76

201.061333.17

1.270.12

4.191.28

562.0823395.71

70.261151.36

16406.4

0.43811.125

15.124384.15

72.87108.45

21.41138.15

201.061333.17

1.250.12

4.191.28

648.7527002.81

81.091328.88

16406.4

0.49512.573

15.01381.254

82.04122.11

24.11155.56

201.061333.17

1.230.11

4.191.28

725.3130189.62

90.661485.71

18457.2

0.43511.049

17.13435.102

81.68121.57

24154.87

254.471641.73

1.600.15

4.711.44

926.3238856.25

102.931686.63

20508

0.43811.125

19.124485.75

91.59136.12

26.92173.66

314.162026.83

1.990.19

5.241.60

1288.2253619.94

128.822111.02

20508

0.63516.129

18.73475.742

131.45195.65

38.63249.23

314.162026.83

1.910.18

5.241.60

1812.8175454.95

181.282970.67

Contact your Nucor Skyline representative for additional diameters, lengths, and starter details.

Saver-subs available to fit all sizes of casingFemale and male casing cut and bundled to specifications

Micropile casing installed with fully threaded 75 ksi bar reinforcement


Micropile Casing

Casing accessories include duplex and flange adapters API drill rods and casing subs are typical tooling itemsDownhole hammers and bits are available in various sizes and shank configurations

Micropile Casing Accessories

Nucor Skyline is positioned to deliver complete accessory packages with your threaded casing. We understand the urgency of your project and stock a wide range of micropile casing accessories for immediate delivery.

J-Teeth Grout Heads Duplex Adapters

Ring Bits Shear Rings Flange Adapters

Casing Shoes Protective Caps Casing Crossover Subs

Tooling Items

Custom machining is available for duplex and flange adapters to match casing, drill, and drill system requirements. We can also fabricate crossover subs to fit any existing tooling items.

Nucor Skyline offers the following tooling items for the installation of micropile casing:

Air Swivels API Crossover Subs API Drill Rods (2 3/8 in to 6 5/8 in)

Breakout Wrenches Casing Crowns Cushion Subs

Diverter Heads Downhole Hammers Downhole Hammer Bits

Drag Bits Floating Subs Flushing Heads

Grout Swivels Ictology Bits Stabilizers

Tricone Bits


Multi-Strand Anchor Systems

Multi-Strand Anchor Systems

STEEL ANCHORHEADCAP (OPTIONAL)

AØ

GR50 OR A36BEARING PLATE**

A500STEEL TRUMPET PIPE

H

16”

Typ.

AASHTO M252HDPE CORRUGATEDSHEATH

Anchor Head & Duct Dimensions for DCP Strand Anchors

Max. No. of

Strands

Corrugated Sheath Trumpet Pipe Anchor Head

OD

inmm

ID

inmm

OD

inmm

ID

inmm

AØ

inmm

H

inmm

2-32.3359.18

2.0050.80

4.00101.60

3.54890.12

4.70119.38

1.8045.72

3-7*3.6091.44

3.0076.20

4.50114.30

4.026102.26

5.60142.24

2.2055.88

8-12*4.60

116.844.00

101.606.625168.28

6.065154.05

6.80172.72

1.7043.18

* The above table is based on a 3/4” OD PE Grout Tube installed inside corrugated sheath, other variations available. Consult your sales representative.**Nucor Skyline can provide a customized bearing plate solution.

Details of PTI Class I DCP Strand Anchor Head

Multi-Strand Anchors - ASTM A416

No. of 0.6” Strands

Nominal Cross Section Area

(Aps)

in²mm²

Ultimate Strength

(Fpu x Aps)

kipskN

Maximum Jacking Load

(0.8 x Fpu x Aps)

kipskN

Maximum Design Load

(0.6 x Fpu x Aps)

kipskN

Minimum Lockoff Load

(0.5 x Fpu x Aps)

kipskN

Nominal Steel Weight (Bare Strand)

lbs/ftkg/m

10.217140

58.6261

46.9209

35.2156

29.3130

0.741.10

20.434280

117.2521

93.8417

70.3313

58.6261

1.482.20

30.651420

175.8782

140.6626

105.5469

87.9391

2.223.31

40.868560

234.41043

187.5834

140.6626

117.2521

2.964.41

51.085700

293.01303

234.41043

175.8782

146.5652

3.705.51

61.302840

351.61564

281.31251

211.0938

175.8782

4.446.61

71.519980

410.21825

328.21460

246.11095

205.1912

5.187.71

81.7361120

468.82085

375.01668

281.31251

234.41043

5.928.82

91.9531260

527.42346

421.91877

316.41408

263.71173

6.669.92

102.1701400

586.02607

468.82085

351.61564

293.01303

7.4011.02

112.3871540

644.62867

515.72294

386.81720

322.31434

8.1412.12

122.6041680

703.23128

562.62503

421.91877

351.61564

8.8813.22

132.8211820

761.83389

609.42711

457.12033

380.91694

9.6214.33

143.0381960

820.43649

656.32920

492.22190

410.21825

10.3615.43

153.2552100

879.03910

703.23128

527.42346

439.51955

11.1016.53

163.4722240

937.64171

750.13337

562.62503

468.82085

11.8417.63

173.6892380

996.24432

797.03545

597.72659

498.12216

12.5818.73

183.9062520

1054.84692

843.83754

632.92815

527.42346

13.3219.84

194.1232660

1113.44953

890.73962

668.02972

556.72476

14.0620.94

Aps = Area Prestressing Steel, Fpu = Minimum Ultimate Tensile StrengthStrand Anchors utilize 0.6” (15.2mm) dia. 7-wire, Low Relaxation 270 KSI Steel Strand conforming to ASTM A 416.*Maximum lockoff load shall not exceed (0.7 x Fpu x Aps), maximum jacking load shall not exceed (0.8xFpu x Aps)Now available: Hot Melt Extrusion Coated Strand. Consult your sales representative for information on load distributive or removable strand anchors.


Product Detail: Multi-Strand Anchors

Multi-Strand Ground Anchors

As a result of recent technological developments in the structural post-tensioning industry, the production of ground anchors with a very high capacity is possible. The use of strand anchors in rock and soil anchor applications has become a well respected tool in the geotechnical engineer’s arsenal of solutions. By utilizing the combined load carrying capacity of multiple 0.6 inch diameter prestressing steel strands, loads which greatly exceed the tensile strength of any single bar can be achieved.

Strand anchors can be produced in extremely long lengths. For instance, strand anchors measuring anywhere from 100 to 200 feet in length can be assembled, coiled and banded in one of our manufacturing locations and shipped on wooden pallets via conventional flat-bed trucks.

In addition, many of the strand anchors used in temporary excavation support consist of seven strands or less. These anchors can often be uncoiled and installed by hand. Strand anchors also generally require much less site storage space and handling than bar anchors. We offer customized strand anchor manufacturing which allows for the design to be optimized in terms of both load carrying capacity and geometry to meet the requirements of specific site conditions. Nucor Skyline is committed to bringing the latest developments in global strand anchoring technology to the North American geotechnical construction industry. Innovations such as load distributive and removable strand anchors are available from Nucor Skyline. A key element in being able to use these technologies is having the practical installation equipment to test and lock off these types of anchors.

Multi-strand anchors having individual strands of different lengths can pose many challenges when using traditional hollow ram jacks. Our partnership with Samwoo allows us to offer a unique multi-ram manifold jack system that is capable of maintaining an equal load in each strand, independent of the elongation.

Load Distributive Multi-Strand Anchors

Over the years, the geotechnical industry has benefited from improvements in the cost and performance of traditional North American bundled multi-strand anchors. Over 20 years ago, the “Single Bore Multiple Anchor (SBMA)” concept, also known as “Load Distributive Tensile Anchor (LDTA)” was developed. Load Distributive Compression Anchors (LDCA) were introduced shortly thereafter. Nucor Skyline offers both tensile and compression load distributive strand anchor systems.



Relative Bond Stress Distribution

Tension Anchor (North American Standard)

As described in the Post- Tensioning Institute’s publication “Recommendations of Rock and Soil Anchors,” bond stresses are not uniform over the tendon bond length. When a tension load is applied to this type of anchor, load transfer to the bond length is developed through adhesion of the borehole grout to the steel strand. Theoretical and experimental analysis shows that the bond stress concentration at the top of the bond zone is fairly uniform at low loads. As the load increases, de-bonding of the strand/grout occurs and the peak bond stress moves down the bond length.

In strain sensitive soils, the residual bond stress could be significantly less than the ultimate bond stress. To overcome this effect, designers sometimes extend the unbonded length of the anchor to a specific depth to attempt to load some of the bond length in compression.

Compression Anchors

Compression type anchors typically have a structure, such as a plate, which transfers load to the bond length at the distal end of the tendon. The compression type anchor has the advantage of exerting load to the grout as a compressive force. This type of anchor requires a high-strength grout. In addition, a similar bond stress transfer mechanism to the ground still occurs, but it takes place in the reverse direction.

Load Distributive Compression Anchors (LDCA)

A sensible method to overcome the limitations of the peak stress transfer effect to the ground is to more equally distribute the stress over the entire bond length. Load distributive compression (LDCA) type anchors, such as those offered by the Samwoo system, apply load to multiple points by using “anchor bodies” as a point of load transfer. Sheathed strands end in each of the anchor bodies within the anchor tendon. To optimize the entire length of the bond zone, the designer has the ability to specify the spacing or location of the anchor bodies, resulting in a much more equal distribution of peak bond stress.

The Smart Anchor, the most recent tensile type load distributive anchor offering by Samwoo is capable of securing stable loads in even relatively weak soils such as clay and silts. This anchor has an anchor body with a bare strand tail behind it which greatly increases the bond stress distribution at each anchor point.

LDCAs minimize creep and maximize the holding power of a multi-strand ground anchor.

Load Change Diagram (Fig. 1)

Load Distribution Graph (Fig. A) Load Distribution Graph (Fig. B) Load Distribution Graph (Fig. C)

Load Change Diagram (Fig. 2)

Load Change Diagram (Fig. 3-1)

Load Change Diagram (Fig. 3-2)

Nucor Skyline: Geostructural Solutions 23


HDPE Extruded Steel Strand w/Corrosion Inhibiting Grease

Steel Strand

Compression GripSpacer

Block

Anchor Body

Max Bracket(Angle Free Bracket)

AnchorHead

Borehole Grout

Borehole

Bond Length

Free Le

ngth

Bond Length (N

2)

Bond Length (N

1)

The Load Distributive Tension Anchors (LDTA), or Smart Anchors, are load distributive tension type removable anchors designed to uniformly transfer skin friction to the grout body and soil. This is done throughout the entire bond length, rather than applying a concentrated force at the distal end of the anchor body. These anchors were developed for the purpose of securing anchorage forces in relatively weak soils with N values less than 10. The removal process for a smart anchor is similar to that used with Removable Load Distributive Compression Anchors (LDCA-Removable).

Features

• The load distributive design allows the anchoring force to be secured in soils with low confining pressure (approx. N ≤ 10).

• Minimizes the working space required for strand removal.

• Removal cost is minimized by ease of strand removal in difficult soils.

• When applied to weak ground, constructability, convenience and economic efficiency are outstanding, especially when compared to other techniques.

• Acceptable anchor performance is possible with a lower strength grout than is required for LDCAs.

Load Distributive Tension Anchors (LDTA) – Smart Anchors

CLASS I CORROSION PROTECTION – (DCP)

CLASS II CORROSION PROTECTION – (SCP)

Greased and Sheathed Portions

Greased and Sheathed Portions

Bond Portions

Bond Portions

Load Distributive Tension Anchors





Single Anchor Body

ConcreteBlock

ProtectionCap

AnchorHead

Borehole GroutBorehole

Double Anchor Body

Borehole Grout

Borehole

Bond Length

Free Le

ngth

Bond Length

Free Le

ngth

ConcreteBlock

Permanent Load Distributive Compression Anchors (LDCA-Permanent)

The permanent Load Distributive Compression Anchors (LDCA-Permanent) are intended to function for a period of time exceeding two years, as recommended by the Post-Tensioning Institute (PTI) manual. These anchors utilize a pre-stressing steel strand that is greased and sheathed for outstanding corrosion resistance. The strand passes through the anchor body where it is held by a set of wedges. The wedges, set at the back side of the anchor body, are permanently factory set and do not have the ability to be released from the anchor head.

The positioning of the wedges allows the jacking force to be distributed along the length of the anchor body. This maximizes the effectiveness of the cross-sectional area of the grout column in the borehole. In addition to being used in numerous applications, these anchors are mainly used for: permanent sheathing and shoring solutions, resisting buoyancy forces in tie down anchors, slope stabilization and landslide control.

Features

• The aluminum anchor body and corrosion resistant housing provides a powerful corrosion resistant system.

• The number of steel strands is easily adjusted according to the design loads and soil conditions.

• Anchors are manufactured in a standardized, semi-automated facility with advanced equipment, resulting in stringent quality control and outstanding quality assurance.

• Anchors are fully assembled, coiled and stacked on pallets, making them ideal for transportation, job site use and long-term storage.

Upgraded• The newly developed corrosion-resistant aluminum die-casting anchor body• Further improved part precision and bonding method• Superb steel strand protection structure and grout infiltration blocking effect


The Removable Load Distributive Compression Anchors (LDCA-Removable) are load distributive anchors that offer a complete solution where the removal of the anchorage system is required upon becoming redundant. Often times, municipalities and similar organizations will not approve obstructions that are left in the ground after a project is completed for fear that they will conflict with upcoming developments or may require third-party approval in the future. These types of compression anchors offer a cost-effective solution where conventional tie back anchors are not approved. Otherwise, the only alternative for a contractor is a internally braced system with rakers or struts.

The pre-stressing steel strand, in its entirety, can be easily and quickly removed by hand. This can be accomplished by rotating the strand that disengages the wedges at the back end of the anchor body and then withdrawing the steel strand through the HDPE sheath. All that is left behind is the small aluminum anchor body and the plastic sheath. Since the strand passes through the anchor body where it is held by a set of wedges, the jacking force is distributed along the length of the anchor body. This maximizes the effectiveness of the cross-sectional area of the grout column in the borehole. Since their inception, LDCA anchors have been utilized in numerous projects around the world to provide lateral support to temporary sheathing and shoring solutions.

Features

• The tensile force is distributed evenly along the bond length making it ideal for highly plastic clay soils.

• The diameter of a 2-strand anchor body is 4.5”, for a 0.6” diameter steel strand. Therefore, the anchor body can easily be installed in a 5.5” or larger borehole.

• Additional corrosion protection is provided by the continuous heavy wall HDPE sheath.

• The steel strand can be easily removed or re-engaged to the body by rotating the strand with a pair of pliers; resulting in minimized site access and removal process.

• Having strands individually secured to the distal end of the anchor body, maximizes design performance and reduces eccentricity.

• Up to 4,000 of these anchors have been used on a single project with over a 99% successful removal rate.

HDPE Sheath Steel Strand w/Corrosion Inhibiting Grease

HDPE Sheath Steel Strand w/Corrosion Inhibiting Grease

Single Anchor Body

Max Bracket(Angle Free Bracket)

AnchorHead

Borehole Grout

Borehole

Double Anchor Body

Borehole GroutBorehole

Bond Length

Free Le

ngth

Bond Length

Free Le

ngth

How to Remove

1. Cut the steel strand.

2. Separate the steel strand from the waler and remove the waler.

3. Rotate the steel strand in a clockwise direction and open the wedge.

4. Manually remove the steel strand and separate from the open wedge.

Principles of Removable Compression Anchors

Jacking and fixing Cutting wire, moving wedge

Rotating wire, opening wedge

Removing strand

Removable Load Distributive Compression Anchors (LDCA-Removable)

Upgraded• The newly developed corrosion-resistant aluminum die-casting anchor body• Further improved part precision and bonding method• Superb steel strand protection structure and grout infiltration blocking effect


Applications: Ground Anchors

Ground Anchors

Over the past 50 years, fully threaded, high strength threaded bar and multi-strand anchor systems with corrosion protection have developed into the most accepted and highly reliable ground anchorages available. As the leading steel supplier in the United States’ foundation industry, Nucor Skyline manufactures the most extensive selection of cold and hot rolled, high strength, fully threaded bars; available in both 75 ksi and 150 ksi steel grades.

Nucor Skyline offers the most advanced multi-strand ground anchor technology available in the geotechnical industry in the United States. In addition to traditional multi-strand PTI Class I permanent and Class II temporary strand anchors, we have the world’s most convenient and widely used removable strand anchor system.

Manufactured in the United States with domestic strand, heads and wedges, we supply the required jacking systems and the technical field support to allow contractors to economically use this technology. Already proven on commercial projects in the United States, a full scale experimental and theoretical evaluation of the system has been conducted in accordance with US standards by one of the geotechnical industries’ most respected independent consulting engineering firms at a location administered by an American university. This information is available to all, along with the technical support required for use of the system.

Advantages

• Highly versatile and well proven method of transferring tension forces to the ground

• Used in a wide array of installation techniques developed to drive cost-efficient construction in the geotechnical industry

• Tie back installations eliminate internal bracing and rakers which typically congest the excavation. This dramatically increases the efficiency of material removal by the contractor during temporary excavation

• Reliable permanent anchors, with decades of proven performance, allow engineers to confidently design structural and slope stabilization projects

• Tie down applications often replace mass concrete, reducing construction costs

Waterfront

Square –

Philadelphia, PA

Applications

• Retaining Walls: Tie backs are used as either a permanent or temporary anchor system for permanent retaining walls or support of excavation.

• Resist Uplift: Used to resist hydrostatic uplift pressures on a slab, structural force, or wind loads on a structure.

• Sloped Surface Stabilization

• Landslide Mitigation

• Foundation Stabilization


PermanentWall

PermanentTieback

Soil

TemporarySheeting

TemporarySheeting

TemporaryTieback

FutureStation

ExistingDam

PermanentTiedown

PermanentTiedown

Tower

BridgeAbutment

Tension inAnchor

Uplift

Floor Slab

SlopeProtection

Anchor

ExistingBuilding

Typical Uses for Ground Anchors



FREE LENGTH

BOND LENGTH

TAIL

HEX NUT &FLAT WASHER

CAST IN PLACERETAINING WALL

HEX JAM NUT

HEX NUT &FLAT WASHERTHREADED BAR

BEARING PLATE

BEARING PLATE

INTERNAL PLUG

WELDED PIPE TRUMPET

TAPE SEALTAPE SEAL CEMENTITIOUS

GROUT POLY CORRUGATEDTUBING

COUPLER ASSEMBLY HEAT SHRINK

TUBINGCENTRALIZER

END CAP

DRILL HOLE


Tie Back or Tie Down Anchors

Tie backs are fully threaded steel bars that are bored, cast-in-place elements designed to resist tension forces resulting from the support of earth retention systems, such as: foundation walls or retaining walls.

Tie backs are commonly used to support temporary walls for excavations in congested urban areas. One type of temporary wall is a beam and lagging wall. The use of tie downs in this application reduces the amount of soil disturbed during excavation and decreases the disturbance on adjacent structures. In this very common application, H-piles are tremie concreted into drilled holes in a vertical orientation, along the perimeter of the intended excavation. Wood lagging is installed horizontally to retain the soil behind and between the piles as the top-down excavation takes place.

Anchor design is based on well-documented and proven principles. Once the structural loading has been identified, the geotechnical information available from the site can be used to determine the appropriate anchor design, as recommended in the PTI Manual “Recommendations of Rock and Soil Anchors”.

The design must take the variability that occurs throughout most sites into consideration. For example, the Great Lakes Region is a region where glaciers traversed the landscape, carving and filling vast areas with sand, clay, gravel and countless combinations of all soil types. Soils may contain boulders, cobbles, gravel and other obstructions which make it challenging to drill holes. As a result, soil conditions vary drastically from site to site. For example, in parts of Texas, Oklahoma and in the upper Missouri Valley, clay soils may be expansive and may dominate the design of ground anchors.

Soil borings and laboratory testing should be used to verify the actual soil conditions in the location of a proposed anchor.

Prior to starting a tie back or tie down anchor design, a licensed geotechnical engineer should be consulted. A simple, standardized design process may be applied using a prescribed method such as the following:

Geotechnical Considerations

• Soils: Cohesive, cohesionless or rock

• Design life: Permanent or temporary (less than 2 years)

• Loading type: Tensile, compressive or lateral

• N-values: Obtained from STP test

• Termination depth

• Corrosion potential

Structural Considerations

• Surface surcharge loading type: Tensile, compressive or lateral

• Groundwater

• Soil properties

• Buckling

Field Quality Control

• Site access

• Installation methods

• Load testing requirements

Typical Grouted Class I Permanent Anchor



Corrosion Protection

Corrosion protection is a technique used to extend the design life of an anchor. It is extremely important to protect the integrity of the steel which could be significantly damaged if a method of corrosion protection is not utilized. The level of corrosion protection varies and is controlled by the aggressiveness of the environment and the desired design life. It is the responsibility of the design engineer to select an appropriate level of protection.

All bar and strand anchors can be supplied with a protective smooth-walled PVC tube. While the standard PVC tube is 0.035 inch thick, other options are available upon request.

The following corrosion protection options are available for all bars and strands:

Double Corrosion Protection (DCP)/PTI Class I

With Double Corrosion Protection, the threaded bar is typically encased in a factory grouted, PVC or HDPE corrugated plastic. DCP fabrication is used mainly for permanent applications or in uncertain and aggressive environments. For strand anchors, the strand is placed in the corrugated duct in the factory and grouted entirely in the field.

BOREHOLE GROUT

END CAP

DRILL HOLE

EXTERNAL CENTRALIZER

INTERNAL SPACERS

TRUMPET

WEDGES

ANCHOR HEAD

BEARING PLATE

UNBONDED LENGTH

BOND LENGTH

PRESTRESSING STEEL STRANDINDIVIDUALLY COVERED IN CORROSIONINHIBITING COMPOUND AND SHEATHED

FILLED WITH CORROSIONINHIBITING COMPOUND ORGROUTFILLED WITH CORROSION

INHIBITING COMPOUND ORGROUT

ANCHOR HEAD COVER(OPTIONAL)

ENCAPSULATION CORRUGATED SHEATHINGGROUT FILLED (FULL LENGTH OF ANCHOR)

CAP COVER(OPTIONAL)

FILLED WITH CORROSION INHIBITING COMPOUND OR GROUT

GROUT FILLED CORRUGATEDSHEATHING

CENTRALIZER

PRESTRESSING STEELTHREADED BAR

END CAP

TRUMPET

SEAL

BEARING PLATE

FULL LOAD NUT

FILLED WITH CORROSIONINHIBITING COMPOUND OR

GROUT

BOREHOLE GROUT

SMOOTH PVC OVERUNBONDED LENGTH

UNBONDED LENGTH

BOND LENGTH

Class I Protection: Bar Anchor (DCP)

Class I Protection: Strand Anchor (DCP)

STEEL ANCHOR HEADCAP (OPTIONAL)

AØ

GR50 OR A36BEARING PLATE**

A500STEEL TRUMPET PIPE

H

16”

Typ.

AASHTO M252HDPE CORRUGATEDSHEATH

Anchor Head & Duct Dimensions for DCP Strand Anchors

Max. No. of

Strands

Corrugated Sheath Trumpet Pipe Anchor Head

OD

inmm

ID

inmm

OD

inmm

ID

inmm

AØ

inmm

H

inmm

2-32.3359.18

2.0050.80

4.00101.60

3.54890.12

4.70119.38

1.8045.72

3-7*3.6091.44

3.0076.20

4.50114.30

4.026102.26

5.60142.24

2.2055.88

8-12*4.60

116.844.00

101.606.625168.28

6.065154.05

6.80172.72

1.7043.18

* The above table is based on a 3/4” OD PE Grout Tube installed inside corrugated sheath, other variations available. Consult your sales representative.

**Nucor Skyline can provide a customized bearing plate solution.

Details of PTI Class I DCP Strand Anchor Head


BOREHOLE GROUT

BOND LENGTH

UNBONDED LENGTH

INTERNAL SPACERS

DRILL HOLE

EXTERNAL CENTRALIZER

WEDGES

ANCHOR HEAD

BEARING PLATE

PRESTRESSING STEEL STANDINDIVIDUALLY COVERED IN CORROSIONINHIBITING COMPOUND AND SHEATHED

• Encapsulating: Grease or Grout

• Hot Melt Fusion-bonded Epoxy Coating

• Coal Tar Epoxy Coating

• Hot Dip Galvanizing

• Multi-layer Painting

• Heat Shrink Seals

• Mastic Backed Tape Systems (i.e. DENSO™)

Oversized accessories are provided to accommodate galvanized and coated bars.


Single Corrosion Protection (SCP)/PTI Class II

In a Single Corrosion Protection (SCP) system, the bar or strand is sleeved with a HDPE or PVC plastic sheath through the free length of the anchor. SCP fabrication is used primarily for temporary applications, but can also be leveraged for non-aggressive, permanent applications.

Factory-issued corrosion protection options include:

Class II Protection: Bar Anchor (SCP)

Class II Protection: Strand Anchor (SCP)

BOREHOLE GROUT

PRESTRESSING STEELTHREADED BAR

GREASED AND SHEATHEDSMOOTH PLASTIC WITH CORROSIONINHIBITING COMPOUND

FULL LOAD NUT

BEARING PLATE

UNBONDED LENGTH

BOND LENGTH

CENTRALIZER

SEAL


Rock Bolts and Anchor Bolts

Rock bolts support the face of a rock slope or cut. When securing the face of an excavation, rock bolts are used to support the unstable rock on the surface to the more stable rock behind the excavation. Roof bolts anchor the overhead portion of the tunnel excavation to the more stable rock above it. Anchor bolts serve to connect a structure to its foundation and can be used when securing wind turbines, tower structures, sign posts, stairways, and buildings.

Advantages

• Threaded bar rolling facilities which manufacture anchor bolts to strict tolerances

• Grade 75 and Grade 150 threaded bars show minimum relaxation under tension

• Large diameter anchor bolts can be designed to meet minimum yield strengths of up to 847 kips, with an ultimate strength of 1,059 kips or over 500 tons

WIND TOWER SHELL

THREADED BAR

HEX NUT

F-436 HARDENED WASHER

PVC BOLT SLEEVE

TEMPLATE TOP RING

TOWER FLANGE

EMBEDMENT RING

F-436 HARDENED WASHER

HEX NUT

Wind Turbine Anchor Bolt

Applications

• Wind Turbine Anchor Bolts

• Utility Tower Anchor Bolts

• Sloped Surface and Rock Face Stabilization

Berkshire

Wind Power

Project –

Hancock, MA

Applications: Rock Bolts/Anchor Bolts


Applications: Soil Nails

Applications

• Temporary Support of Excavation

• Permanent Retaining Walls

• Slide Stabilization

Soil Nails

Soil nails are bars installed within an excavation or slope to provide reinforcement to an earth retention structure. They differ from tie backs in that they are considered passive elements and are not actively loaded in tension like a prestressed ground anchor. Soil nails are used in combination with a steel grid cover and shotcrete. As a system, the soil nail, grid cover, and shotcrete act as a coherent mass with enough strength to resist the overburden pressure of the surrounding soil mass, as well as any surcharge pressure.

In comparison to tie back anchors, soil nails have a few significant benefits. The equipment required to install soil nails is relatively small and mobile, providing a distinct advantage for applications with tight spaces or noise control issues. Using soil nails is typically a more flexible construction technique, allowing for simpler on-site modifications. Also, soil nails are installed early on in the construction process, limiting the disturbance on adjacent structures.

Advantages

• Cutting-edge manufacturing process eliminates material loss

• Left- and right-hand thread configurations optimize threading flexibility

• Various grade options offer flexibility in yield strength

• Wide range of sizes

• Fully threaded bars provide ability to cut bars to desired length

• Ability to supply single bar lengths of up to 60 feet

• Wide variety of corrosion protection options available

• Complete range of accessories available to complement our threaded bars

Moretrench-

Avonworth

Primary Center –

Pittsburgh, PA

Typical Top Down Construction Sequence

2.Install first row of nails

3.Stabilize first excavation with temporary shotcrete facing

4.Excavate to next row of nails

1.Excavate to slightly below

first row of nails

5.Stabilize excavation with

temporary shotcrete facing

6.Excavate to next row of nails

7.Stabilize excavation with

temporary shotcrete facing

8.Once all nails and temporary facing are

complete, install permanent facing


Applications: Soil Nails

STUD x4

HEX NUT

FLAT HARDENED WASHER

BEVELED WASHER

BEARING PLATE

CONCRETE WALL

SHOTCRETEGEOCOMPOSITEDRAIN

PVC CENTRALIZER

TAIL

10’ SECTIONSTYPICAL

COUPLER

GROUT

HOLESACRIFICIAL DRILL BIT

FULLY THREADEDHOLLOW BAR

Soil Nail with Hollow Bar

EPOXY COATED THREADED BAR

END CAP

PVC CENTRALIZER

PVC CORRUGATED SHEATHING

SHOTCRETE

GEOCOMPOSITE DRAIN

INITIAL GROUT LEVEL

CONCRETEWALL

EPOXY COATEDHEX NUT

EPOXY COATEDFLAT HARDENED WASHER

EPOXY COATEDBEVEL WASHER

BEARING PLATE ASSEMBLY

15º SHOTCRETE

Typical DCP Soil Nail


Tie Rods

Threaded bars from Nucor Skyline are ideal as tie rods for retaining walls. In addition to being the North American market leader in steel sheet piling, Nucor Skyline also manufactures and supplies several types of tie rods. Continuously threaded cold rolled bar is made at our internal facilities. Skyline works with Nucor to supply hot rolled threaded bar. Hot rolled bars with forged upset ends are manufactured in Germany by our partner Anker Schroeder. The tie rods supplied by Skyline gives our customers the widest range of choices and best value in the industry.

Advantages

Cold Rolled Bars – ASTM A615 Gr. 75

• Manufactured in USA by Nucor Skyline

• Continuously Threaded for Easy Cutting and Coupling

• Rolled Thread Reduces Local Stress Peaks

• 1.0 in. – 3.5 in. Diameter

• 36 – 432 k allowable strength range

Hot Rolled Bars – ASTM A615 Gr. 75

• Manufactured in USA by Nucor

• Continuously Threaded for Easy Cutting and Coupling

• Robust Threads that Will not Jam


• 20 – 101 k allowable strength range

Hot Rolled with Forged Upset Ends – Grade 72.5 ksi

• Manufactured in Germany by Anker Schroeder

• Upset Ends for Maximum Strength to Weight Ratio

• Forged Ends for Variety of End Shapes


• 297 – 1,270 k allowable strength range

Applications

• Marine Bulkheads

• Earth Retaining Walls

• Bridge Abutments and Roadways

• Structural Ties (in slab)

Applications: Tie Rods

Port of Tampa

Berth 213 –

Tampa, FL


Sheet Pile Retaining Wall



Tie Rods for Combined Wall Systems

Combined wall systems usually require long, heavy tie rods. Most combined wall systems also have a lot of fill placed behind the wall, over the anchorage system. This fill, often placed over marine deposits can cause settlement of the anchorage system. Tie rods are designed to take tension loads and the settlement of the bar or the deadman wall can put bending loads into the bars and increase the stresses significantly. Common solutions for this are to support the anchorage system, increase the cross section area of the bar, or provide a means of articulation for the tie rod.

Supporting the anchorage system is sometimes done with bearing piles and horizontal support beams. This system can reduce the bending in the bars, but it is also expensive and requires tight tolerances on the elevations of the support structure.

Wall distance center to center

Tie rod elongation under load

Tie rod deflection due tosettlement and self weight

Existing ground

Fill materialMLW

MHW

FED FED

Bending stress induced by

settlement or misalignment



The additional stress created by potential bending or misalignment can be reduced by increasing the cross sectional area in the thread. This can be achieved by using upset forging technology which increases the diameter of the tie bar where it is required.

The use of upset forged threads was common place in the U.S. when it was seen as an engineered solution to reducing stress in the more vulnerable threads. The introduction of higher grades of steel, 50 and 75 ksi steels, made this technology less popular as these steels could not be forged. Anker Schroeder has developed the ASDO range of high strength steels that can be forged and reduce weight and costs for large diameter bars.

To save even more weight and money, articulated connections are available. Forged eyes and spherical ends allow the tie rods to rotate in relation with king piles, walers, or each other. This rotation significantly reduces the stress at the end of the bar. Eurocode design guidelines (EN1993-5 "Design of Steel Structures - Part 5 Piling") state that in connections where articulation is not provided, the capacity of a threaded bar must be reduced by a factor of 0.6, but only by 0.9 for articulated connections.

Thread and Spherical Nut

upset forged thread As > Ag ; variable ratio As / Ag

Forged eEye Forged Spherical End

Cross Sectional Area of ThreadAs

Cross Sectional

Area of ShaftAg

ØD Ød = variable

By allowing the bar to rotate, the bending effect of settlement can be minimized. Any installation misalignment can also be accommodated. Typically, ASDO articulated joints allow up to 7 degrees of rotation.

Bending stress induced by settlement or misalignment

α

Articulation removes bending stress at connection α < 7º



Articulated TurnbuckleAn adjustable turnbuckle allows length adjustment and articulation in one plane

Link PlatesTogether with forged eyes, link plates provide the most economic articulated joint and the simplest connection to achieve in site conditions.

Cardan JointThe cardan joint allows bars with forged eyes to articulate in both vertical and horizontal planes.

Forged Eye & Transition Coupler The forged eye connects, via the transition coupler, to Nucor Skyline’s cold and hot rolled bars and allows for full articulation.

Typical King Pile Wall with Articulated Connections

Consideration should also be given to articulation requirements along the length of the tie bar, particularly at points of maximum settlement or where the size of the tie bar and the site conditions mean that a pinned joint is easier to make than a threaded coupled joint. Several alternatives are available.



Typical Articulated Wall Connection Solutions Offered by ASDO

Cast Eye Cast Spherical Box Cast T Plate

T-Plates for HZ-piles

Pipe Connectors




Loss of Thickness Due to Corrosion for Piles in Soil with or without Groundwater


in / mm

Undisturbed natural soils (sand, clay, schist, …) 0.0000.00

0.0120.30

0.0240.60

0.0350.90

0.0471.20

Polluted natural soils and industrial grounds 0.0060.15

0.0300.75

0.0591.50

0.0892.25

0.1183.00

Aggressive natural soils (swamp, marsh, peat, …) 0.0080.20

0.0391.00

0.0691.75

0.0982.50

0.1283.25

Non-compacted and non-aggressive fills (clay, schist, sand, silt, …)

0.0070.18

0.0280.70

0.0471.20

0.0671.70

0.0872.20

Non-compacted and aggressive fills (ashes, slag, …) 0.0200.50

0.0792.00

0.1283.25

0.1774.50

0.2265.75

Notes:

1. Corrosion rates in compacted fills are lower than those in non-compacted ones. In compacted fills, the figures in the table should

be divided by two.




Loss of Thickness Due to Corrosion for Piles in Fresh Water or in Sea Water


in / mm

Common fresh water (river, ship canal, …) in the zone of high attack (water line)

0.0060.15

0.0220.55

0.0350.90

0.0451.15

0.0551.40

Very polluted fresh water (sewage, industrial effluent, …) in the zone of high attack (water line)

0.0120.30

0.0511.30

0.0912.30

0.1303.30

0.1694.30

Sea water in temperate climate in the zone of high attack (low water and splash zones)

0.0220.55

0.0741.90

0.1483.75

0.2205.60

0.2957.50

Sea water in temperate climate in the zone of permanent immersion or in the intertidal zone

0.0100.25

0.0350.90

0.0691.75

0.1022.60

0.1383.50

Notes:

1. The highest corrosion rate is usually found at the splash zone or at the low water level in tidal waters. However, in most cases, the

highest stresses are in the permanent immersion zone.




Corrosion Protection – Sacrificial Steel

Corrosion protection of tie rods is an important consideration during the design process. Most tie rods are surrounded by clean fill so the corrosion rate is quite low, but regardless of the environment corrosion must be accounted for. Corrosion rates are determined over the design life of the structure and is added as additional steel to the bar and other components of the anchorage system.

There are a number of methods to protect the tie rod from corrosion such as wrapping or painting but the best method is sacrificial steel. The use of upset forging technology allows this to be a very efficient solution since steel can be added where required. For example, additional material can be added at a vulnerable threaded end. Sacrificial steel is very forgiving; it cannot be applied incorrectly, forgotten or damaged during shipping and installation. It also allows much quicker installation times than traditional wrapping systems. Once the whole tie bar cost is considered (material, handling, repair and installation), sacrificial steel is very economical.


Threaded Bars

End Threaded Forged Bars3.3" – 6.5”, 72.5 ksi



NormalEnd Threaded

Upset End Threaded

Forged Eye

Spherical Forged End

Threaded & Spherical Nut

Cold Rolled Threaded Bar#8 – #28 bars (1” – 3.5”), 75 ksi

Hot Rolled Threaded Bar#6 – #14 bars (0.75” – 1.75”), 75 ksi



Tie Bars with Articulation

BarThread

DiameterShaft

Diameter



Yield Capacity

Ultimate Capacity

Gross Area

Yield Capacity

Ultimate Capacity

DT

Dg

As

Thy

Thu

Ag

Shy

Shu

ASD* LRFD*

inmm

inmm

in2

mm2

kipskN

kipskN

in2

mm2

kipskN

kipskN

kipskN

kipskN

Co

ld/H

ot

Ro

lle

d B

ars

#81.000

251.000

250.79510

59.3263.8

79351.4

0.79510

59.3263.8

79351.4

36158

56251

#91.12528

1.12528

1.00645

75.0333.6

100444.8

1.00645

75.0333.6

100444.8

45200

71317

#101.250

321.250

321.27819

95.3423.9

127564.9

1.27819

95.3423.9

127564.9

57254

91403

#111.375

351.375

351.561,006

117.0520.5

156694.0

1.561,006

117.0520.5

156694.0

70312

111494

#141.750

451.750

452.251,452

168.7750.4

2251,000.9

2.251,452

168.7750.4

2251,000.9

101449

160713

#182.250

552.250

554.002,581

300.01,334.5

4001,779.4

4.002,581

300.01,334.5

4001,779.4

180799

2851,268

#202.500

642.500

644.913,168

368.01,637.0

4912,184.0

4.913,168

368.01,637.0

4912,184.0

220980

3501,555

#243.000

763.000

767.074,561

530.02,356.0

7073,144.9

7.074,561

530.02,356.0

7073,144.9

3171,411

5032,238

#283.500

893.500

899.61

6,200720.0

3,206.0960

4,274.09.61

6,200720.0

3,206.0960

4,274.0432

1,920685

3,046

En

d T

hre

ad

ed

Fo

rge

d B

ars

M 85/763.385

2.9976

7.674,948

5562,474

7343,266

7.034,536

5102,286

6732,994

3051,358

4842,155

M 90/803.590

3.1580

8.675,591

6282,795

8303,690

7.795,027

5652,513

7463,318

3381,505

5372,388

M 95/853.795

3.3585

9.726,273

7053,137

9314,140

8.805,675

6382,837

8423,745

3821,699

6062,695

M 100/903.9100

3.5490

10.846,995

7863,497

1,0384,616

9.866,362

7153,181

9444,199

4281,905

6793,022

M 105/954.1105

3.7495

12.027,755

8723,878

1,1515,119

10.997,088

7973,544

1,0524,678

4772,122

7573,367

M 110/1004.3110

3.94100

13.268,556

9624,278

1,2695,647

12.177,854

8833,927

1,1655,184

5292,351

8393,731

M 115/1054.5115

4.13105

14.569,395

1,0564,697

1,3946,201

13.428,659

9734,330

1,2855,715

5832,593

9254,113

M 120/1104.7120

4.33110

15.9210,274

1,1555,137

1,5246,781

14.739,503

1,0684,752

1,4106,272

6402,845

1,0154,514

M 125/1154.9125

4.53115

17.3511,191

1,2585,596

1,6617,386

16.1010,387

1,1685,193

1,5416,855

6993,110

1,1094,934

M 130/1205.1130

4.72120

18.8312,149

1,3666,074

1,8038,018

17.5311,310

1,2715,655

1,6787,464

7613,386

1,2085,372

M 135/1255.3135

4.92125

20.3713,145

1,4786,573

1,9508,676

19.0212,272

1,3796,136

1,8218,099

8263,674

1,3105,829

M 140/1305.5140

5.12130

21.9814,181

1,5947,090

2,1049,359

20.5713,273

1,4926,637

1,9698,760

8933,974

1,4176,305

M 145/1355.7145

5.31135

23.6515,256

1,7157,628

2,26410,069

22.1914,314

1,6097,157

2,1249,447

9634,286

1,5286,799

M 150/1405.9150

5.51140

25.3716,370

1,8408,185

2,42910,804

23.8615,394

1,7307,697

2,28410,160

1,0364,609

1,6447,312

M 155/1456.1155

5.71145

27.1617,524

1,9708,762

2,60011,566

25.6016,513

1,8568,256

2,45010,899

1,1114,944

1,7637,844

M 160/1506.3160

5.91150

29.0118,716

2,1049,358

2,77712,353

27.3917,671

1,9868,836

2,62211,663

1,1895,291

1,8878,394

M 165/1556.5165

6.10155

30.9219,948

2,2429,974

2,96013,166

29.2518,869

2,1219,435

2,80012,454

1,2705,649

2,0158,963

The recommended design capacities are based on AISC/ASD and AASHTO/LRFD design methodologies for steel structures and retaining walls. Additional reduction factors from EN1993-5 are applied to the tie-rods based on their ability to articulate. Sample calculations can be found on pages 43 and 45 of this brochure.



Fully Threaded Bar with Articulation

Bar Designation: #8 (1.0 in)

Yield / Tensile: 75 / 100 ksi

Thread & Shaft Properties Tensile Stress Area (As) = 0.79 in2

Yield Capacity (Shy, Thy) = (0.79 in2) * (75 ksi) = 59.3 kips

Ultimate Capacity (Shu, Thu) = (0.79 in2) * (100 ksi) = 79 kips

Recommended Design Capacity (Ft)

ASD Ft = Lesser of: Shy / 1.67 = (0.79 in2) * (75 ksi) / 1.67 = 36 kips

0.9 * Thu / 2 = 0.9 * (0.79 in2) * (100 ksi) / 2.0 = 36 kips

Ft = 36 kips

LRFD Ft = Lesser of: 0.95 * Shy = 0.95 * (0.79 in2) * (75 ksi) = 56 kips

0.9 * 0.8 * Thu = 0.9 * 0.8 * (0.79 in2) * (100 ksi) = 57 kips

Ft = 56 kips

End Threaded Bar with Articulation

Nominal Upset Thread Diameter (DT) = 3.9 in

Shaft Diameter (Dg) = 3.54 in

Steel Grade (fy) = 72.52 / 95.69 ksi (500 / 660 MPa)

Thread Properties Tensile Stress Area (As) = 10.84 in2

Yield Capacity (Thy) = (10.84 in2) * (72.52 ksi) = 786 kips

Ultimate Capacity (Thu) = (10.84 in2) * (95.69 ksi) = 1038 kips

Shaft Properties Gross Area (Ag) = 9.86 in2

Yield Capacity (Shy) = (9.86 in2) * (72.52 ksi) = 715 kips

Ultimate Capacity (Shu) = (9.86 in2) * (95.69 ksi) = 944 kips


ASD Ft = Lesser of: Shy / 1.67 = (9.86 in2) * (72.52 ksi) / 1.67 = 428 kips

0.9 * Thu / 2 = 0.9 * (10.84 in2) * (95.69 ksi) / 2.0 = 467 kips

Ft = 428 kips

LRFD Ft = Lesser of: 0.95 * Shy = 0.95 * (9.86 in2) * (72.52 ksi) = 679 kips

0.9 * 0.8 * Thu = 0.9 * 0.8 * (10.84 in2) * (95.69 ksi) = 747 kips

Ft = 679 kips

Sample Calculations



Tie Bars without Articulation

BarThread

DiameterShaft

Diameter



Yield Capacity

Ultimate Capacity

Gross Area

Yield Capacity

Ultimate Capacity

DT

Dg

As

Thy

Thu

Ag

Shy

Shu

ASD* LRFD*

inmm

inmm

in2

mm2

kipskN

kipskN

in2

mm2

kipskN

kipskN

kipskN

kipskN

Co

ld/H

ot

Ro

lle

d B

ars

#81.000

251.000

250.79510

59.3263.8

79351.4

0.79510

59.3263.8

79351.4

24105

38169

#91.12528

1.12528

1.00645

75.0333.6

100444.8

1.00645

75.0333.6

100444.8

30133

48214

#101.250

321.250

321.27819

95.3423.9

127564.9

1.27819

95.3423.9

127564.9

38169

61271

#111.375

351.375

351.561,006

117.0520.5

156694.0

1.561,006

117.0520.5

156694.0

47208

75333

#141.750

451.750

452.251,452

168.7750.4

2251,000.9

2.251,452

168.7750.4

2251,000.9

68300

108480

#182.250

552.250

554.002,581

300.01,334.5

4001,779.4

4.002,581

300.01,334.5

4001,779.4

120534

192854

#202.500

642.500

644.913,168

368.01,637.0

4912,184.0

4.913,168

368.01,637.0

4912,184.0

147655

2361,048

#243.000

763.000

767.074,561

530.02,356.0

7073,144.9

7.074,561

530.02,356.0

7073,144.9

212943

3391,510

#283.500

893.500

899.61

6,200720.0

3,206.0960

4,274.09.61

6,200720.0

6,206.0960

4,274.02881,282

4612,052

En

d T

hre

ad

ed

Fo

rge

d B

ars

M 85/763.385

2.9976

7.674,948

5562,474

7343,266

4.993,217

3621,608

4772,123

217963

3441,528

M 90/683.590

3.1580

8.675,591

6282,795

8303,690

5.633,632

4081,816

5392,397

2441,087

3881,725

M 95/723.795

3.3585

9.726,273

7053,137

9314,140

6.314,072

4582,036

6042,687

2741,219

4351,934

M 100/763.9100

3.5490

10.846,995

7863,497

1,0384,616

7.034,536

5102,268

6732,994

3051,358

4842,155

M 105/804.1105

3.7495

12.027,755

8723,878

1,1515,119

7.795,027

5652,513

7463,318

3381,505

5372,388

M 110/854.3110

3.94100

13.268,556

9624,278

1,2695,647

8.805,675

6382,837

8423,745

3811,694

6062,695

M 115/904.5115

4.13105

14.569,395

1,0564,697

1,3946,201

9.866,362

7153,181

9444,199

4181,860

6692,976

M 120/904.7120

4.33110

15.9210,274

1,1555,137

1,5246,781

9.866,362

7153,181

9444,199

4281,905

6793,022

M 125/954.9125

4.53115

17.3511,191

1,2585,596

1,6617,386

10.997,088

7973,544

1,0524,678

4772,122

7573,367

M 130/1005.1130

4.72120

18.8312,149

1,3666,074

1,8038,018

12.177,854

8833,927

1,1655,184

5292,351

8393,731

M 135/1055.3135

4.92125

20.3713,145

1,4786,573

1,9508,676

13.428,659

9734,330

1,2855,715

5832,593

9254,113

M 140/1105.5140

5.12130

21.9814,181

1,5947,090

2,1049,359

14.739,503

1,0684,752

1,4106,272

6312,808

1,0104,492

M 145/1105.7145

5.31135

23.6515,256

1,7157,628

2,26410,069

14.739,503

1,0684,752

1,4106,272

6402,845

1,0154,514

M 150/1155.9150

5.51140

25.3716,370

1,8408,185

2,42910,804

16.1010,387

1,1685,193

1,5416,855

6993,110

1,1094,934

M 155/1206.1155

5.71145

27.1617,524

1,9708,762

2,60011,566

17.5311,310

1,2715,655

1,6787,464

7613,386

1,2085,372

M 160/1256.3160

5.91150

29.0118,716

2,1049,358

2,77712,353

19.0212,272

1,3796,136

1,8218,099

8263,674

1,3105,829

M 165/1306.5165

6.10155

30.9219,948

2,2429,974

2,96013,166

20.5713,273

1,4926,637

1,9698,760

8883,950

1,4176,305

The recommended design capacities are based on AISC/ASD and AASHTO/LRFD design methodologies for steel structures and retaining walls. Additional reduction factors from EN1993-5 are applied to the tie-rods based on their ability to articulate. Sample calculations can be found on pages 43 and 45 of this brochure.



Fully Threaded Bar without Articulation

Bar Designation: #8 (1.0 in)

Yield / Tensile: 75 / 100 ksi

Thread & Shaft Properties Tensile Stress Area (As) = 0.79 in2

Yield Capacity (Shy, Thy) = (0.79 in2) * (75 ksi) = 59.3 kips

Ultimate Capacity (Shu, Thu) = (0.79 in2) * (100 ksi) = 79 kips


ASD Ft = Lesser of: Shy / 1.67 = (0.79 in2) * (75 ksi) / 1.67 = 36 kips

0.6 * Thu / 2 = 0.6 * (0.79 in2) * (100 ksi) / 2.0 = 24 kips

Ft = 24 kips

LRFD Ft = Lesser of: 0.95 * Shy = 0.95 * (0.79 in2) * (75 ksi) = 56 kips

0.6 * 0.8 * Thu = 0.6 * 0.8 * (0.79 in2) * (100 ksi) = 38 kips

Ft = 38 kips

End Threaded Bar without Articulation

Nominal Upset Thread Diameter (DT) = 3.9 in

Shaft Diameter (Dg) = 2.95 in

Steel Grade (fy) = 72.52 / 95.69 ksi (500 / 660 MPa)

Thread PropertiesTensile Stress Area (As) = 10.84 in2

Yield Capacity (Thy) = (10.84 in2) * (72.52 ksi) = 786 kips

Ultimate Capacity (Thu) = (10.84 in2) * (95.69 ksi) = 1038 kips

Shaft PropertiesGross Area (Ag) = 6.85 in

Yield Capacity (Shy) = (6.85 in2) * (72.52 ksi) = 497 kips

Ultimate Capacity (Shu) = (6.85 in2) * (95.69 ksi) = 655 kips


ASDFt = Lesser of:

Shy / 1.67 = (6.85 in2) * (72.52 ksi) / 1.67 = 297 kips

0.6 * Thu / 2 = 0.6 * (10.84 in2) * (95.69 ksi) / 2.0 = 311 kips

Ft = 297 kips

LRFD Ft = Lesser of: 0.95 * Shy = 0.95 * (6.85 in2) * (72.52 ksi) = 472 kips

0.6 * 0.8 * Thu = 0.6 * 0.8 * (10.84 in2) * (95.69 ksi) = 498 kips

Ft = 472 kips

Sample Calculations


Applications: Micropiles

Micropiles for

Foundation

of Apartment

Building –

New York, NY

Micropiles

Micropiles are small diameter, bored cast-in-place piles, with most of the applied load being resisted by steel reinforcement. They are constructed by drilling a borehole, often using casing, then placing steel reinforcement and grouting the hole. Micropiles have a wide range of uses and are becoming a more mainstream method of supporting and resupporting foundations, seismic retrofits, stabilization of slopes and even earth retention.

Micropiles are usually designed in small clusters or groups with each typically carrying an equal amount of load. These piles may also be designed with a batter to improve the lateral rigidity of the group. They can be designed to resist a combination of compression, tension and lateral forces.

Micropiles are an ideal pile for complex sites where low vibration or low noise levels are required, or where limited access such as low headroom and drilling is difficult. Other site conditions that make micropiles attractive are: obstructions, large cobbles or boulders, nearby sensitive structures, karst topography or high groundwater conditions. The unique characteristics of micropiles make them a perfect solution when other deep foundation methods are not suitable.

Advantages

• Creates a pile with a relatively high axial load capacity

• Works in compression and tension

• Lightweight rotary percussive equipment can be used

• Easily installed within confined spaces

• No harmful vibrations or noise to surrounding structures

• Minimal spoil generation on contaminated sites

Applications

• Structural Support of Directly Loaded Pile

• New Foundations

• Underpinning of Existing Structures

• Seismic Retrofitting

• Reinforcement for Slope Stabilization and Settlement Reduction

• Support of Excavation – Soldier Piles

• Permanent Retaining Walls


Applications: Micropiles

Hollow Bars: Micropiles

Micropiles produced with hollow bars have been well proven and are widely accepted in private and public works in the United States. After extensive research, the system has been accepted by the Federal Highway Administration (FHWA).

In collapsing soils, the use of hollow bars to produce micropiles is ideal. Where open hole drilling may be limited in depth or temporary casing is required, hollow bars offer a single step process of grouting and reinforcing. In addition, higher values of ground to grout bond have resulted from the use of this method. The smaller, and often less expensive equipment, used with the hollow bar system allows for lower project costs and makes it easier for less specialized general contractors to use. This system is also perfect in sites with limited access or low headroom.

Advantages

• Works in compression and tension

• Potential for very high production rates

• The most efficient form of micropile in confined spaces

• Hollow bars form smaller pile groups

• Grouting while drilling provides a potential for densification of insitu soils


Applications: Pile Reinforcement

Pile Reinforcement

Nucor Skyline’s fully threaded bars may be coupled by screw-on, sleeve-type couplers at any point. Hex nuts and jam nuts may also be used, providing great versatility in the fabrication of structural column or pile reinforcing steel. The Nucor Skyline-manufactured grade 75/80 ksi threaded bar system meets the ASTM A 615 Standard Specification for Deformed Carbon-Steel Bars for Concrete Reinforcement requirements.

Pre-assembled Reinforcing Bar Cages

Nucor Skyline is a leader in custom-manufactured steel products for the foundation industry. We are able to produce pre-assembled configurations of fully threaded bar at our multiple manufacturing locations. Overhead bridge cranes and large steel warehouses facilitate the assembly of bars, custom spacer rings, and top and bottom structural plates. High tensile strap bands are used to stabilize the cages for lifting and transport. With our extensive expertise and infrastructure, we are able to fabricate and ship large foundation steel components to just about anywhere in the United States.

For example, cage assemblies over 65 ft long, with 18 circumferential #18 grade 75 bars, have been transported over 1,000 miles with only minor field adjustments required upon arrival. Cages measuring 130 feet in length have been produced in our Camp Hill, PA manufacturing facility and shipped directly to the job site in Manhattan, NY.

Advantages

• Factory fabrication provides efficiency at the jobsite resulting in cost savings on the project

• In-factory assembly prevents production schedule delays due to site weather or laydown conditions

• Reinforcing with Nucor Skyline Grade 75 ksi provides a larger range of bar sizes than traditional rebar

• The coupling of the bars is pre-done and held in a thread locked condition, eliminating concerns of becoming loose

• Spacer rings and steel banding provide a stable arrangement of bar cages, which facilitates crane pick up and lowering

Logan Airport Light Tower Foundation – Boston, MA

Applications

• Pre-assembled Concrete Reinforcement for the Largest Drilled Shaft Piles

• Augercast Pile Reinforcement Cages

• Micropile Reinforcement

12/1

8 Ed

ition

www.nucorskyline.com | 888.450.4330

For technical questions and engineering support, please contact us via our technical hotline at:

866.875.9546 or email us at: [email protected].

About Nucor SkylineA premier steel foundation supplier serving the U.S., Canada, Mexico, the Caribbean, Central America, and Colombia, Skyline Steel, LLC is a wholly-owned subsidiary of Nucor Corporation, the largest producer of steel in the United States.

Documents

Geostructural Solutions - Nucor Skyline Library/Document... · Micropile threaded casing production capacity has been expanded to further supplement our full line of bar reinforcing