Dextra Engineered Bar Systems

www.dextragroup.com

ENGINEEREDBar Systems

Vision To be a global leader in engineering, manufacturing and delivery of high value added quality products and services for the construction industry.

Mission To achieve customer recognition and stakeholder satisfaction by committing to the highest level of performance with integrity, creativity and a passion for results.

| DEXTRA | E n g i n e e r e d B a r S y s t e m s | 2

About UsEstablished since 1983, Dextra Manufacturing is a leading

manufacturer and distributor of engineered construction products

for the building and civil industries.

Dextra has developed for the past fifteen years a comprehensive

range of high-performance bar systems made of steel and

composite materials suitable for a variety of applications in ground

anchoring, concrete tensioning and roof and façade support.

The combination of our in-house engineering expertise and design

capability with modern manufacturing facilities has allowed us to

participate in the supply of very large construction projects such

as Suvarnabumi Airport in Bangkok (2000 tons of tension bars) or

Boubiyan Seaport (6,000 Tons of Tie rods and accessories).

Thanks to our ISO and ASME quality certifications, we are

able to control and maintain a high level of quality in all our bar

components and systems and guarantee full compliance with

the project specifications and customer satisfaction from design

stage to delivery and installation.

ContentProduct Range 4-5

Marine Tie Rods 6-9

Architectural Bar Systems 10-13 Carbon Tension Bars 10-11 Stainless Steel Tension Bars 12 Compression Struts 13

Post Tensioning Bars 14-17 Fully threaded 14-15 Smooth 16 Shear Key systems 17

Ground Anchors 18-21 Steel ground anchors 18-19 FRP Soil Nails 20 GFRP Active Anchors 21

Rock Bolts 22-25 Self Drilling Hollow Rock Bolts 22 Friction bolts 23 FRP Rock-Dowels 24 FRP Hollow Rock Bolts 25

Engineering & Quality 26-27 Service

Engineering

Production

| w w w. d e x t r a g r o u p . c o m | DEXTRA | 3

Engineered Bar Systems

Marine Tie RodsTie Rods are used in port and harbour construction to anchor waterfront structures such as quay walls, berths and crane runways. Dextra’s unique range covers various steel grades from 355 to 700 N/mm2 in yield strength, and thread diameters from M42 to M162. Several articulated joints such as swivel plates, captive nuts and ball cage systems can be used to accommodate the project requirements and our anchorages are compatible with any sheet piles profile, combi walls or concrete diaphragm walls. Dextra also supplies corrosion protection solutions and can prefabricate wailing beams and fixing bolts to provide a complete anchoring system.

Tension barsand compression strutsTension bars are typically used to hold or stiffen the roofs of large structures. Being most of the time exposed, they need to be strong but also aesthetic.

Compression struts complement Dextra offer for roof supporting systems when structural members are required to take compression loads.

With a wide range of sizes and accessories in various steel grades both carbon and stainless and various finishes, Dextra system meets the engineering and design requirement of consultants and architects alike.


Rock & soil anchorsMaintaining a structure on the ground or stabilizing the soil during excavation are some of the first concerns of civil engineers when starting a project.

For vertical structures, cantilevered structures, underground works, tunnelling works or slope stabilisation, Dextra has an answer to all geotechnical anchorage challenges, being permanent solutions with adapted corrosion protection or innovative temporary solutions using fibre-polymer products.

Post-tensioning, lifting & stressing barsPost-tensioning of concrete structures is usually done with cables and strands. However, on short distances, bars provide a number of benefits: Less draw-in loss, superior corrosion resistance, reliable modulus of elasticity and lower relaxation. Moreover they are easier to extend, to de-tension and to re-stress and need a much smaller recess for their jacking.

Contrary to conventional high-tensile bars, Dextra high-performance bars have guaranteed levels of ductility and impact strength that make them the safest choice for seismic protection.

Typical applications • Harbours• Wharves• Jetties• River embankments

Product features• Available in steel grades 355, 500, 700 N/mm².• Thread diameter range M42 to M162.• Rolled thread for better performance.• Minimum Elongation

› Gr 355 18-22%* › Gr 500 17% › Gr 700 15%

• Impact strength (V-Notch): › Gr 355, 500: 27 J at -20°C › Gr 700: 27 J at 0°C

* As per BSEN-10025, yield and tensile vary depending on nominal bar size.

Design references • BS EN 1993 • ANSI/AISC 360-05• AS 4100

Marine Tie Rods

Port Autonome de Pointe Noire, Republic of Congo


System presentation

Product benefits Various articulation solutions with captive nut, swivel nut, ball cage, T-plate, angle seating, and / or forked ends.

• Ductile design.

• Quick installation.

• Pre-tensioning applicable.

• Full range of accessories for specific applications.

Corrosion protection / surface finish Dextra tie rods can be delivered without any specific surface finish when considering sacrificial thickness as specified in EN 1993 Part 5.

However other alternatives are available to enhance corrosion protection, such as bituminous tape, paint or hot dip galvanization, depending on the project design and requirements.

Port Khalid, United Arab Emirates

SLNG Terminal, Singapore

Captive nut

Hinge coupler

Turnbuckle

Pad eyeBall cage

Coupler

Plate and nut

Angle seating

Pad-eye and T-Plate


Accessories

Captive Nuts Accommodates 5 degrees of rotation in all directions.

Ball CagesAccommodates 10 degrees of rotation in all directions. Must be used in conjunction with bearing plate if embedded in concrete.

Plates and Nuts

Plates and nuts are available both in flat and swivel design.

Swivel plates and nuts accommodate up to 7 degrees of deflection

Couplers and Turnbuckles

Turnbuckle : For connecting two rods assembly with length adjustment up to ± 100mm. Coupler : For connecting two bars.

Hinge Coupler For connecting two rods assembly with an important articulation in one plan

Angle Seatings For installation on inclined surfaces. Accomodates deflection in both horizontal and vertical directions.

Forks and SpadesA pair of fork and spade form an articulation joint in one direction - they can also be connected on to gusset plates.

Pad Eye and T - Plate

A pad eye forms an articulation joint in one plan in order to adapt to specific designs or terrain configurations. A pad eye can provide an articulation joint of up to 90°.

Jeddah South Power Plant, Saudi Arabia


Note: Yield loads and ultimate loads are unfactored.

Tie Rods load table

Thread size

Nominal bar

diameter

Linearweight

Grade 355/510 Grade 500/660 Grade 700/900

Yield load*

Ultimate load*

Tension capacity as per EC3

Yield load*

Ultimate load*


Yield load*

Ultimate load*


mm mm kg/m kN kN kN kN kN kN kN kN kNM42 40 9.86 398 572 411.6 560 740 532.7 785 1,009 726.4

M45 43 11.40 464 666 479.6 653 862 620.6 914 1,175 846.3

M48 45 12.48 523 751 540.9 737 972 700.0 1,031 1,326 954.6

M52 49 14.80 624 897 645.5 879 1,160 835.3 1,230 1,582 1,139.1

M56 53 17.32 721 1,035 745.4 1,015 1,340 964.7 1,421 1,827 1,315.5

M60 57 20.03 839 1,205 867.3 1,181 1,559 1,122.4 1,653 2,126 1,530.6

M64 61 22.94 950 1,365 982.6 1,338 1,766 1,271.6 1,873 2,408 1,734.0

M68 65 26.04 1,085 1,558 1,121.9 1,528 2,017 1,451.9 2,139 2,750 1,979.8

M72 69 29.35 1,228 1,764 1,270.4 1,730 2,283 1,644.1 2,422 3,114 2,241.9

M78 75 34.67 1,460 2,098 1,510.5 2,057 2,715 1,954.8 2,880 3,702 2,665.6

M83 80 39.45 1,669 2,398 1,726.4 2,351 3,103 2,234.2 3,291 4,231 3,046.6

M88 85 44.54 1,892 2,718 1,956.8 2,664 3,517 2,532.3 3,730 4,796 3,453.1

M93 90 49.93 2,128 3,058 2,201.5 2,998 3,957 2,849.1 4,197 5,396 3,885.1

M98 95 55.63 2,379 3,418 2,460.7 3,351 4,423 3,184.5 4,691 6,031 4,342.5

M103 100 61.64 2,643 3,798 2,734.3 3,723 4,915 3,538.6 5,213 6,702 4,825.3

M108 105 67.96 2,922 4,198 3,022.4 4,115 5,432 3,911.3 5,762 7,408 5,333.6

M113 110 74.59 3,214 4,618 3,324.8 4,527 5,976 4,302.7 6,338 8,149 5,867.3

M118 115 81.52 3,521 5,058 3,641.7 4,959 6,546 4,712.8 6,942 8,926 6,426.5

M123 120 88.76 3,841 5,518 3,973.0 5,410 7,141 5,141.5 7,574 9,738 7,011.1

M128 125 96.32 4,175 5,998 4,318.7 5,881 7,762 5,588.9 8,233 10,585 7,621.2

M133 130 104.18 4,523 6,498 4,678.8 6,371 8,410 6,054.9 8,919 11,468 8,256.7

M143 140 120.82 5,261 7,559 5,442.3 7,411 9,782 7,043.0 10,375 13,339 9,604.1

M153 150 138.69 6,055 8,699 6,263.5 8,529 11,258 8,105.7 11,940 15,352 11,053.2

M162 160 157.80 6,818 9,794 7,051.9 9,602 12,675 9,126.0 13,443 17,284 12,444.5

Wheatstone LNG Terminal, Australia


System presentation

Takao Stadium, Taiwan

Carbon Steel Tension Bars

Product benefits• High steel grades available, allowing the use of smaller bar diameters

to achieve the same tension capacity, which in turn can make site installation both quicker and easier.

• In situ length adjustment can be achieved by rotation of the bar (if the tendon is supplied without turnbuckle) and/or turnbuckle.

• Turnbuckles also allow for the application of a preload, making for example self-weight sagging corrections easier.

Surface finishCarbon Steel Tensino Bars can either be delivered painted or galvanized. If required, they can also be delivered non-painted (plain black steel surface).

Design references • BS EN 1993 (Euro Code3, EC3).• ANSI/AISC 360-05 Load & Resistance Factor Design method (LRFD). • ANSI/AISC 360-05 Allowable Stress Design method (ASD).• AS 4100

Accessories

Forks and Spades

A pair of Fork and Spade form an articulation joint Forks and spades are connected to gusset plates.

CouplersCouplers are used to connect standard length bars to achieve longer required length.

Turnbuckles

Turnbuckles are used to connect and adjust the bar to achieve required length and remove sagging.

Cross Turnbuckles

Cross-turnbuckles allow two tendons to cross each other in the same plan.

Lock coversLock covers are used to cover the exposed thread of the bar.

Pins Pins are used to connect clevises and gusset plates.

Typical applications• Roof support systems• Truss bracing systems• Temporary stays and braces• Hanging floors• Pedestrian and road bridges

Product features • Custom made & specifically designed accessories• Available steel grades 355, 460, 500 & 700 N/mm² • Thread diameter range M16 to M162.• Rolled threads• Minimum Elongation*

› Gr 355 18-22 (varies upon bar diameter) › Gr 460 17% › Gr 500 17% › Gr 700 15%

• Impact strength (V-Notch): › Gr 355, 460, 500: 27 J at -20°C › Gr 700: 27 J at 0°C

* elongation at failure as per ISO 6892 , i.e on gauge length 5.56 √So

Fork

Coupler and lock cover

Spade

Turnbuckles and lock cover


Bar Thread

size

NominalBar

Diameter**

Linear weight

Grade 355/510 Grade 460/610 Grade 500/660 Grade 700/800

Yield Load***

Ultimate Load***

Tension capacity as per

EC3****

Yield Load***

Ultimate Load***


EC3****

Yield Load***

Ultimate Load***


EC3****

Yield Load***

Ultimate Load***


EC3****

mm mm kg/m kN kN kN kN kN kN kN kN kN kN kN kN

M16 15 1.4 56 80 58 72 96 69 78 103 74 110 125 90

M18 17 1.8 68 98 71 89 117 85 96 127 91 135 154 111

M20 19 2.2 87 125 90 113 149 108 122 162 116 171 196 141

M24 23 3.3 125 180 129 162 215 155 176 233 168 247 282 203

M27 26 4.2 163 234 169 211 280 202 230 303 218 322 368 265

M30 28 4.8 199 286 206 258 342 246 280 370 266 392 448 323

M33 31 5.9 246 354 255 319 423 305 347 458 330 485 555 399

M36 34 7.1 290 417 300 376 498 359 408 539 388 572 653 470

M39 37 8.4 346 498 358 449 595 429 488 644 464 683 781 562

M42 40 9.9 398 572 412 516 684 492 560 740 533 785 897 646

M45 43 11.4 464 666 480 601 797 574 653 862 621 914 1,045 752

M48 45 12.5 523 751 541 678 899 647 737 972 700 1,031 1,179 849

M52 49 14.8 624 897 645 809 1,072 772 879 1,160 835 1,230 1,406 1,013

M56 53 17.3 721 1,035 745 934 1,238 892 1,015 1,340 965 1,421 1,624 1,169

M60 57 20.0 839 1,205 867 1,087 1,441 1,037 1,181 1,559 1,122 1,653 1,890 1,361

M64 61 22.9 950 1,365 983 1,231 1,632 1,175 1,338 1,766 1,272 1,873 2,141 1,541

M68 65 26.0 1,085 1,558 1,122 1,405 1,864 1,342 1,528 2,017 1,452 2,139 2,444 1,760

M72 69 29.3 1,228 1,764 1,270 1,591 2,110 1,520 1,730 2,283 1,644 2,422 2,768 1,993

M78 75 34.7 1,460 2,098 1,511 1,892 2,509 1,807 2,057 2,715 1,955 2,880 3,291 2,369

M83 80 39.5 1,669 2,398 1,726 2,163 2,868 2,065 2,351 3,103 2,234 3,291 3,761 2,708

M88 85 44.5 1,892 2,718 1,957 2,451 3,251 2,340 2,664 3,517 2,532 3,730 4,263 3,069

M93 90 49.9 2,128 3,058 2,202 2,758 3,657 2,633 2,998 3,957 2,849 4,197 4,796 3,453

M98 95 55.6 2,379 3,418 2,461 3,083 4,088 2,943 3,351 4,423 3,184 4,691 5,361 3,860

M103 100 61.6 2,643 3,798 2,734 3,425 4,542 3,270 3,723 4,915 3,539 5,213 5,957 4,289

M108 105 68.0 2,922 4,198 3,022 3,786 5,021 3,615 4,115 5,432 3,911 5,762 6,585 4,741

M113 110 74.6 3,214 4,618 3,325 4,165 5,523 3,977 4,527 5,976 4,303 6,338 7,244 5,215

M118 115 81.5 3,521 5,058 3,642 4,562 6,050 4,356 4,959 6,546 4,713 6,942 7,934 5,712

M123 120 88.8 3,841 5,518 3,973 4,977 6,600 4,752 5,410 7,141 5,141 7,574 8,656 6,232

M128 125 96.3 4,175 5,998 4,319 5,410 7,174 5,165 5,881 7,762 5,589 8,233 9,409 6,774

M133 130 104.2 4,523 6,498 4,679 5,861 7,773 5,596 6,371 8,410 6,055 8,919 10,193 7,339

M143 140 120.8 5,261 7,559 5,442 6,818 9,041 6,509 7,411 9,782 7,043 10,375 11,857 8,537

M153 150 138.7 6,055 8,699 6,264 7,846 10,405 7,492 8,529 11,258 8,106 11,940 13,646 9,825

M162 160 157.8 6,818 9,794 7,052 8,834 11,715 8,435 9,602 12,675 9,126 13,443 15,364 11,062

* Other bar thread sizes available for large order quantities | **Nominal bar diameter may vary for small order quantities | *** Unfactored load | **** As per BS EN 1993

Tension bars load table


Stainless Steel Tension Bars

Bar Thread

size

NominalBar

Diameter*

Linear weight

SS Grade S460

Yield Load**

Ultimate Load**

Tension capacity as per EC3***

(mm) (mm) (kg/m) (kN) (kN) (kN)

M16 15 1.4 72 102 73

M18 17 1.8 89 125 90

M20 19 2.2 113 159 115

M24 23 3.3 162 229 165

M27 26 4.2 211 299 215

M30 28 4.8 258 364 257

M33 31 5.9 319 451 316

M36 34 7.1 376 531 380

M39 37 8.4 449 634 450

M42 40 9.9 516 729 525

M45 43 11.4 601 849 607

M48 45 12.5 678 958 665

M52 49 14.8 809 1,143 789

M56 53 17.3 934 1,320 923

M60 57 20 1,087 1,535 1,067

M64 61 22.9 1,231 1,739 1,222

M68 65 26 1,405 1,986 1,388

M72 69 29.3 1,591 2,249 1,564

M78 75 34.7 1,892 2,674 1,847

M83 80 39.5 2,163 3,056 2,102

M88 85 44.5 2,451 3,464 2,373

M93 90 49.9 2,758 3,897 2,660

M98 95 55.6 3,083 4,356 2,964

M103 100 61.6 3,425 4,840 3,284

M108 105 68 3,786 5,350 3,621

Product features • Custom made & specifically designed accessories• vailable in stainless steel grade S460 • Thread diameter range M16 to M108.• Rolled threads• Minimum Elongation: 25%• Impact strength: 100 kV (J) at 20°C

About the stainless steel rangeWhere there should be no compromise on aesthetic, a stainless steel tension bars range with an alternative fork design complement our carbon steel offer.

Design references • BS EN 1993 (Euro Code3, EC3).• ANSI/AISC 360-05 Load & Resistance Factor Design

method (LRFD). • ANSI/AISC 360-05 Allowable Stress Design method

(ASD).• AS 4100

Surface finishTwo surface finishes are available: satin finish and mirror finish. If not specified Dextra will consider Mirror finish.

Tension bars load table

*Nominal bar diameter may vary for small order quantities** Unfactored load *** As per BS EN 1993


Compression StrutsMidfield Terminal at Abu Dhabi International Airport, UAE

CHS DimensionsDextra’s compression struts CHS (circular hollow section) range from M16 to M113 and are available in grade 355 and 460.

The total compression capacity is limited by the resitance to buckling (depends on size of CHS and pin-to-pin length) as well as the fork capacity. Please consult us for the full detail table about compression capacity.

Typical applications• Roof support systems• Truss bracing systems

Product features • Carbon steel tube

(Circular Hollow Section) range from 42mm to 356mm

• Thread diameter range from M16 to M113• Minimum Elongation

› Gr 355 21% › Gr 460 21%

• Impact strength 27 J at -20°C

Design references • BS EN 1993 • ANSI/AISC 360-05 • AS 4100• BS 5950

Thread Size CHS Outer Diameter

(mm) (mm)M16 42

M18 42

M20 48

M24 60

M27 60

M30 76

M33 76

M36 89

M39 101

M42 114

M45 140

M48 140

M52 168

M56 168

M60 168

M64 194

M68 219

M72 219

M78 219

M83 245

M88 245

M93 273

M98 324

M103 324

M108 356

M113 356

Surface finishCompression struts can either be delivered painted or galvanized.

If required, they can also be delivered non-painted (plain black steel surface).

| w w w. d e x t r a g r o u p . c o m | DEXTRA | 1 3

Hyderabad Metro, India

Corrosion protection Fully threaded bars are usually protected by fitting a pipe over the bar and grouting it with cement on site.

The smooth bars for shear key applications are normally supplied in a HDPE tube injected with grease.

Other corrosion protections are available as per customer’s specification: galvanizing, plastic shrink films, paint, etc. These various types of protection may be applied on site or in a workshop.

Jahra Road, Kuwait

System descriptionPre-stressing bars are used for permanent works such as connecting various segments of bridge structures, shear keys for seismic resistance at the connection of segments or girders and piers, and reinforcement of piers that are subject to horizontal pre-stressing forces.

They are also used for temporary works such as anchoring of temporary steel frame supports, lifting bars for segment launching trusses, and stitching bar segments before pre-stressing.

These bars need to have sufficient strength properties to carry the heavy loads of structures and pre-loading to balance the external loads structures are subjected to at a later stage.

Our post-tensioning range features both fully-threaded bars and smooth bars, with a full range of accessories which also covers shear key applications.

The services of a fully dedicated design team are available to provide engineering support to our customers.

Typical applications• Post-tensioning of concrete structures• Seismic protection• Heavy lifting• Anchoring• Pre-stressed concrete• Pile-testing

Post-Tensioning Bars


Sutong Bridge, China

• Diameter range from 25 mm to 50 mm• Steel grades 830/1030, 930/1080 & 1080/1230 N/mm2• Minimum Elongation 6%• Modulus of elasticity 205,000 N/mm2• Continuous hot rolled thread

Nominal Diameter

Cross- section area Linear weight Grade

830/1030Grade

930/1080Grade

1080/1230

(mm) (mm²) (kg/m) Yield load (kN)

Ultimate load (kN)

Yield load (kN)

Ultimate load (kN)

Yield load (kN)

Ultimate load (kN)

25 491 4.10 407 506 457 530 530 604

32 804 6.65 667 828 748 869 869 989

36 1,018 8.41 845 1,049 947 1,099 1,099 1,252

40 1,257 10.34 1,043 1,294 1,169 1,357 1,357 1,546

50 1,964 16.28 1,630 2,022 1,826 2,121 2,121 2,415

Design references • BS EN 1993-1-1 (Eurocode 3)• BS EN 1992-1-1 (Eurocode 2) • ACI 318-08

• Re-usable• Re-tensioning possible without any damage• Continuous thread makes connection possible at any point• Full range of accessories for specific applications

Product Benefits

Products Features

Load Table

Fully threaded bars accessoriesProtective

cap

(plastic or steel)

Nuts

Bearing Plate

Coupler

Flat hex nut Spherical hex nut

Spherical hex nut plateFlat plate

Active end Passive end

Fully threaded range

Note 1: Yield loads and ultimate loads are unfactored.Note 2: Diameter 63.5 available upon request and subject to minimum order quantities

Note 3: Grade 555 and Grade 785 available upon request and subject to minimum order quantity.

• ASTM A722• BS 4486• JIS G 3109


ThreadSize

Nominal Diameter

Linear weight Grade 835/1030 Grade 930/1080 Grade 1050/1200

mm (kg/m) Yield load(kN)

Ultimate load(kN)

Yield load(kN)

Ultimate load(kN)

Yield load(kN)

Ultimate load(kN)

M30 28 4.83 468 577 521 605 589 673

M33 31 5.92 579 714 645 749 728 832

M36 34 7.13 682 841 760 882 858 980

M39 37 8.44 815 1,005 907 1,054 1,025 1,171

M42 40 9.86 936 1,155 1,042 1,211 1,177 1,345

M45 43 11.40 1,091 1,345 1,215 1,410 1,371 1,567

M48 45 12.48 1,230 1,517 1,370 1,591 1,547 1,768

M52 49 14.80 1,468 1,811 1,635 1,898 1,846 2,109

M56 53 17.32 1,695 2,091 1,888 2,192 2,132 2,436

M60 57 20.03 1,972 2,433 2,197 2,551 2,480 2,834

M64 61 22.94 2,234 2,756 2,489 2,890 2,810 3,211

M68 65 26.04 2,551 3,147 2,841 3,300 3,208 3,666

M72 69 29.35 2,889 3,564 3,218 3,737 3,633 4,152

M78 75 34.67 3,435 4,237 3,826 4,443 4,319 4,936

M83 80 39.45 3,926 4,843 4,373 5,078 4,937 5,642

M88 85 44.54 4,450 5,489 4,956 5,755 5,595 6,395

M93 90 49.93 5,006 6,175 5,576 6,475 6,295 7,195

M98 95 55.63 5,596 6,902 6,232 7,237 7,036 8,042

M103 100 61.64 6,218 7,670 6,925 8,042 7,819 8,936

Product features• Diameter range from 28 mm to 100 mm. Larger diameters may

be subject to minimum order quantities.• Steel grades 835/1030; 930/1080 and 1050/1200 N/mm2• Minimum Elongation

› Gr 835/1030 12% › Gr 930/1080 10% › Gr 1050/1200 10%

• Modulus of elasticity 205,000 N/mm²• Impact strength 50J at 20°C• Rolled threads (obtained with cold plastic deformation of the

metal between two dies)• Thread profile is ISO metric thread according to ISO 262 -

NFE 03014 and 03053. Larger pitch and trapezoidal threads also available upon request

Product Benefits• High impact resistance • Smaller pitch allows finer adjustment and brings less

draw-in loss• Less sensitive to vibrations• Full range of accessories for specific applications• High fatigue performance

Load Table

Smooth bars accessories

End caps

Active end Passive end

Nuts

Swivel nut Hex nut Round nut

Anchor plates

Swivel plate Flat plate

Smooth bar range

Design references

• BS EN 1993-1-1 (Eurocode 3)• BS EN 1992-1-1 (Eurocode 2) • ACI 318-08• ASTM A722

• BS 4486• JIS G 3109• DIN EN 10083-1

Note 1: Yield loads and ultimate loads are unfactored.

Post-Tensioning Bars


Shear key system and available accessories

Product features

• Shear key bar systems and hold down bar systems also available with their full range of accessories. Those are designed to act as seismic buffer bars.

• Available for smooth bars diameter 37 mm (thread M39) and diameter 43 mm (thread M45).

Shear key & Hold down bars application

End cap plug Support band

Tube seal

O-Ring

Active end cap Swivel nut

Anchor plate System Centralizer

High tensile barHDE sheathing

Duct type(supplied by other)

Shear Key Bar Hold down bar

Shear Key

Box Girder

Column head

Pier


Product features • High tensile fully threaded bars available in three grades for

passive and active (pre-tensionned) anchors. Higher grades

are also available on request.

• Diameter range 25 mm to 63.5 mm.• Continuous hot rolled thread.• Minimum Elongation

› Gr 555/777 6% › Gr 830/1030 6% › Gr 930/1080 6%

• Modulus of elasticity 205,000 N/mm².• Available with either left hand or right hand threads.• FRP & CRP composite rock bolts and soil nails are also

available from diameter 22 to 32 mm.

Benefits

• High grade steel effectively reduces the diameter of the bar allowing for easier handling and a smaller bore hole.

• Continuous thread makes connections possible at any point and increases bonding.

• Coarse thread and surface hardening allow for rough handling.

• Pre-stressing possible for active anchors (available for grade 830/1030 and grade 930/1080).

Typical applications• Excavation tie anchoring (1)• Tunneling (2)• Slope stabilization (3)• Tension piles• Structural repairing• Mining

1.

Grade 555/777

Grade 830/1030

Grade 930/1080

Soil Nail / Rock Dowel(passive anchor) ü ü ü

Soil Anchor / Rock Bolt(active anchor) ü ü

Ground anchors / Steel

Rock and Soil Anchors load table

Nominal diameter

(mm)

Cross-section area

(mm²)

Linear weight (kg/m)

Grade555/777*

Grade830/1030

Grade930/1080*

Yield load(kN)

Ultimate load(kN)

Yield load(kN)

Ultimate load(kN)

Yield load(kN)

Ultimate load(kN)

25 491 4.1 273 381 407 506 457 530

32 804 6.65 446 625 668 828 748 869

36 1,019 8.41 565 791 845 1,048 947 1,099

40 1,257 10.34 697 976 1,043 1,294 1,169 1,357

50 1,963 16.28 1,090 1,526 1,630 2,022 1,826 2,121

63.5* 3,167 26.2 1,758 2,461 * Grade and diameter subject to minimum order quantities

1 11 2


Design references • ANSI/AISC 360-05 • BS 5950• BS EN 1993 (EC3)• BS EN 1997 (EC7)• BS EN 1539• AS4100

HILL SLOPE

3.

System Presentation

Smooth HDPE pipe (free lenght)

Coupler

Corrugated HDPE pipe(bonded lenght)

Unbonded length Bonded length

Active anchor:

Soil anchor / Rock bolt

with double corrosion protection

Passive anchor:

Soil nail / Rock dowel

with single corrosion protection

Centralizer

Grout

Trumpet

End cap

Corrosion protection

Our corrosion protection systems are based on BS 8081 and EN 1537.

Single corrosion protection is achieved by cement grout between bar and bored hole.

Double corrosion protection is achieved by:1. cement grout between bar and corrugated plastic sheath2. additional cement grout between plastic sheath and bored hole

Protective cap

13


Ground anchors / FRP

Soil-NailGFRP fully grouted anchors installed in unstable soil for the purpose of stabilizing a slope or a sequenced excavation.

Technical Information

System Characteristics

Product Reference

Diameter Guaranteed Ultimate Tensile Load

Tensile Modulusof Elasticity

Ultimate Tensile Strain

mm kN GPa %

ASTEC SN45T-19 19 250 50 1.76

ASTEC SN45T-25 25 310 45 1.41

ASTEC SN45T-32 32 430 45 1.22

ASTEC SN45T-41 41 700 45 1.18

Other diameters available upon request | Head and coupling system both developing the full strength of the bar

MTR 1001 Project - Nishimatsu/Jacobs - Hong KongHollow rebar

Nut

Plate

Hollow rebar

Section

Head set

Grout

Sand

Helical wrap

Grout

Bonding

A-A

A A

Hollow Rock-Bolt

Nut

Plate

Rebar

Head set

Sand

Helical wrap

Grout

Bonding

Chamfer

Rock-DowelTie BackSoil Nail

Doha, Qatar


Active Anchor

ASTEC Active Anchor is an active and post-tensioned ground anchoring system. Its unique hybrid concept combines standard PT strand with Astec Glass Rebar (GFRP) thanks to a proprietary connector with guarantees a tensile performance equivalent to the full strength of tendon. The unmatched resistance to alkali and acid attacks of the active anchor makes this Astec Active Anchor the ideal solution for permanent anchorages in corrosive environment without any further sophisticated corrosion protection required. Moreover, periodic monitoring and mainteance are no longer a recurrent cost. The anisotropic characteristic of the GFRP ensures that Astec Active Anchor can easily be cut by common tunnel and pile boring machines. As such Astec Active Anchor is the ultimate alternative to removable anchors generating savings and simplifying the planning of the subsequent phases of the project.

Technical InformationSystem Characteristics

Product Reference

Number of Tendons

Nominal GFRP Cross Sectional Area

UltimateTensile Load

RecommandedService Load

pcs mm2 kN kN

ASTEC TBx-1 1 289.5 250 162

ASTEC TBx-3 3 868.6 750 486

ASTEC TBx-4 4 1,158.1 1,000 648

ASTEC TBx-5 5 1,447.6 1,250 810

ASTEC TBx-7 7 2,026.7 1,750 1,134

ASTEC TBx-9 9 2,605.8 2,250 1,458

ASTEC TBx-25 25 7,238.2 6,250 1,458

ASTEC TBx-55 55 15,924.1 13,750 8,910

Modulus of Elasticity of GFRP rod is 50 GPa | System is available in grade “TB2” with a maximum lifetime of 10 years or grade “TB3” with a maximum lifetime of 5 years.

Hollow rebar

Nut

Plate

Hollow rebar

Section

Head set

Grout

Sand

Helical wrap

Grout

Bonding

A-A

A A

Hollow Rock-Bolt

Nut

Plate

Rebar

Head set

Sand

Helical wrap

Grout

Bonding

Chamfer


Design references • ACI440.1R - 06 • FIB Task Group 9.3 - Bulletin 40• BS EN 7861-1:2007

Typical applications• Slope stabilization• Tunneling• Excavation tie anchoring• Tension piles• Deep excavation foundations subject to uplift forces• Structures subject to compression and tension cycles• Structures under fluctuating water levels• Mining

Product features • Corrosion resistance• Easy to cut• Easy handling • Light weight• Excellent bond to concrete/grout

Using innovative FRP materials, our ASTEC product range offers large scale savings in time and money. The exceptional properties of FRP material allow our products to develop very high strength capacity while being very easy to handle on the job site.

On being easily cut-able they allow unmatchable gains in productivity during sequential excavation. It some cases they suppress the necessity to remove anchors installed beyond the property line. Generally the greatest savings are generated in terms of schedule.

In addition, ASTEC solutions permit significant improvement in the safety and durability. FRP materials are resistant to acid and alkali corrosion, which makes them extremely reliable in ground condition. Finally, all our solutions are designed, qualified, produced and tested according to internationally recognized standard. It allows us to characterize the predictable behavior of each FRP anchor.

Presentation

Active Anchor


Rock bolts / Steel

Product Reference

Length Linear Weight

Outer Ø

Inner Ø Cross section Ultimate load Yield load

(m) (kg) (mm) (mm) (mm2) (kN) (kN)

R25 N 2 - 10 2.3 25 14 292 200 150

R32 L/22 2 - 9 2.8 32 22 356 260 200

R32 N/18.5 2 - 9 3.4 32 18.5 433 280 230

R32 N/20 2 - 9 2.85 32 20 363 280 230

R32 S/17 2 - 9 3.45 32 17 440 360 280

R32 SS/14 2 - 9 4.1 32 14 522 405 300

R38 N/22 2 - 6 4.8 38 22 611 500 400

R38 N/19 2 - 6 5.5 38 19 700 500 400

R51 L 2 - 6 6.3 51 36 713 550 450

R51 N/33 2 - 6 7.8 51 33 993 800 630

T76 N/51 2 - 4 16.5 76 51 2,000 1,600 1,200

T76 S/45 2 - 4 19 76 45 2,400 1,900 1,500

Fully coarse threaded hollow barTechnical Information

Corrosion ProtectionFor temporary applications, the corrosion protection is achieved through encapsulation with grout.

For permanent applications, Dextra Hollow Rock Bolts can be hot dip galvanized according to EN-1461, epoxy-coated or supplied with a sacri f icial thickness i f accounted for at design stage.

For total immunity to corrosion, consider ASTEC GFRP Self Drilling Bolt range.

Self Drilling Hollow Rock BoltsProduct features• 3 in 1 concept: drilling rod, anchor bar

& grouting pipe.• Suitable for both permanent and

temporary applications• Optimum bonding and load transfer• Complete solution including plate and

bolts• Splicing system to adjust to custom

lengths• Standard sacrificial drill bits for every

ground conditions

Benefits• Flexible installation: core injection to

suit all ground conditions• Safety: Visual control of full

encapsulation• One step installation with sacrificial

drill bits: drilling, placing, grouting

• No cased borehole allowing ground preservation

Drilling rod Grouting pipe Splicing system

Plate & Nut


Friction BoltsProduct features

• Available diameter 26 mm, 36 mm• Minimum elongation 20%• Steel grade S355MC as per EN10149-2• Load capacity: DM120: 12 metric tons. DM160: 16 metric tons. DM240: 24 metric tons.• Manufactured according to ISO 9001.

Benefits • High load-bearing capacity combined

with excellent elongation properties.• The elongation properties allow

substantial rock movement without shearing bolt.

• Immediate full length support for faster excavation.

• Simple and clean installation.• Adjusts to borehole irregularities.

Inject bushing

Lofted plate Friction bolt

End bushing

DescriptionProduct type

DM120 DM160 DM240

Variable length up to 8000 mm 8000 mm 8000 mm

Wall thickness 2 mm 2 mm 3 mm

Bolt diameter 26 mm 36 mm 36 mm

Primary tube 41 mm 54 mm 54 mm

Hole diameter range 32-39 mm 43-52 mm 43-52 mm

Properly hole diameter 35-38 mm 45-51 mm 45-51 mm

Ultimate load 120 kN 160 kN 240 kN

Tube elongation ≥ 20% ≥ 20% ≥ 20%

Typical elongation 30% 30% 30%

Lofted plate 150x150x6 200x200x6 200x200x8

Lofted plate hole 30 mm 40 mm 40 mm

Weight 2 kg/m 2.80 kg/m 3.80 kg/m

Technical Information

• Reliable installation quality.• Flexible to variations in drill hole diameter.• Versatile bolting solution for variable

ground conditions.• No grouting or chemical needed.• Manual or mechanical installation at

choice.


Rock-DowelSolid rock-bolt used in tunnels (with mesh and shotcrete) and in soft-rock mining (coal ribs). The full encapsulation is realized using resin cartridges or a grout pipe. This product is also available with an expansion shell.

Rock-Dowel Technical Information

Product Reference

Nominal Diameter

Outside Diameter

Body Tensile Load

Torsional Strenght

System* Tensile Load**

mm mm kN Nm kN

ASTEC RD1-25 25 ≤29 ≥360 ≥300 ≥50

ASTEC RD2-25 25 ≤29 ≥360 ≥300 ≥100

ASTEC RD1-32 25 ≤34 ≥480 ≥300 ≥80

ASTEC RD2-32 25 ≤34 ≥480 ≥300 ≥200

Rock bolts / FRP

* As per BS EN 7861-1:2007** Assembly is composed of nut, plate and thread Other diameters upon request

Hollow rebar

Nut

Plate

Hollow rebar

Section

Head set

Grout

Sand

Helical wrap

Grout

Bonding

A-A

A A

Hollow Rock-Bolt

Nut

Plate

Rebar

Head set

Sand

Helical wrap

Grout

Bonding

Chamfer



Hollow Rock-Bolt Technical Information

Hollow rock-bolt mostly used for face-bolting, in both tunneling and mining.The grouting is injected directly through the bar. This product also exist in SDRB version (Self-Drilling Rock-Bolt).

Product Reference

Nominal DiameterMinimum Hole

Diameter Body Tensile Load Torsional Strenght*

AnchorageTensile Load*

Outside Inside

mm mm mm kN Nm kN

ASTEC HRB0-32 32 13 ≤34 ≥480 ≥200 ≥0

ASTEC HRB1-32 32 13 ≤34 ≥480 ≥200 ≥80

ASTEC HRB2-32 32 13 ≤34 ≥480 ≥200 ≥200

* As per BS EN 7861-1:2007** Assembly is composed of nut, plate and threadAstec Hollow Rock-Bolt is available without plate and nut for face-bolting applicationOther diameters available upon request

Hollow rebar

Nut

Plate

Hollow rebar

Section

Head set

Grout

Sand

Helical wrap

Grout

Bonding

A-A

A A

Hollow Rock-Bolt

Nut

Plate

Rebar

Head set

Sand

Helical wrap

Grout

Bonding

Chamfer

Rock-DowelTie BackSoil Nail Hollow Rock Bolt

Benefits

• Corrosion Resistant: suitable for permanent and temporary applications. In both cases it alleviates all concerns about corrosion.

• The anisotropic characteristic of FRP ensures that it can easily be cut by common mining equipment.

• A clear advantage of FRP bars is their light weight: only 20 to 25% of steel having the same dimensions.

In underground mining, soil stabilization is fundamental and needs to be addressed with extreme care. Solutions are continuously brought to the industry to improve both safety and productivity. Dextra offers a full range of Fiber Reinforced Polymer (FRP) rock-bolting solutions for underground mining.

Being easily-cutable, ASTEC mining solutions allow unmatchable gain in excavation cycles, with significant time saving. Highly resitant to acid and alkali corrosion, our products also permit significant improvement in safety and reliability, making a safer working environment to the miners.

Presentation


Engineering


Quality

Quality AssuranceDextra’s Quality Management System complies with the requirements of:

• ISO 9001• ASME NCA-3800• ASME NQA-1• 10CFR50 Appendix B

Our manufacturing facility and Quality Management System are regularly audited by the following third-party evaluation agencies: • Bureau Veritas: Certificate number TH 006540• American Society of Mechanical Engineers (ASME) :

Certificate number QSC-706

Dextra Manufacturing goal is to ensure code compliance and customer satisfaction in accordance with the project needs and specified requirements.

Material Testing In order to perform our continuous quality control in the most efficient way, we have set up our own material testing lab fitted with modern and high performance testing equipment:

• 2000 KN Universal tensile testing machine

• Rockwell Hardness tester

• Ultrasonic tester (UT)

• Dye penetrant test (PT)

• Profile projector

Dextra Material Testing Laboratory is accredited by ISO/IEC 17025 standard.

HEADQUARTERS THAILANDDextra Manufacturing Co., Ltd.Tel: (66) 2 021 2800 Fax: (66) 2 328 0374E-mail: [email protected]

HONG KONGDextra Pacific Ltd.Tel: (852) 2845 7766 / 2511 8236Fax: (852) 2586 1656 / 2519 0852E-mail: [email protected]

NORTH AMERICADextra America Inc.Tel: (1) 805 915 4734 / 818 261 5166E-mail: [email protected]

INDIADextra India Pvt. Ltd.Tel: (91) 22 2838 6294 / 22 2839 2694Fax: (91) 22 2839 2674E-mail: [email protected]

MIDDLE EASTDextra Middle-East FZETel: (971) 4886 5620 Fax: (971) 4886 5621E-mail: [email protected]

SOUTH AMERICADextra do BrasilTel: (55) 11 5505 2475 / 11 5505 2477E-mail: [email protected]

CHINADextra Building Products (Guangdong) Co., Ltd.Tel: (86) 20 2261 9901 Fax: (86) 20 2261 9902E-mail: [email protected]

EUROPEDextra Europe SARL.Tel: (33) 1 45 53 70 82 Fax: (33) 1 47 04 28 97E-mail: [email protected]

LATIN AMERICA Dextra LatamTel: (507) 6454 8100 / 831 1442E-mail: [email protected]

Commercial presence in more than 55 countries.

www.dextragroup.com

Gua

ngzh

ou

Hon

g K

ong

Mum

bai

São

Pau

lo

Pan

ama

Dub

ai

Par

is

Los

Ang

eles

Los

Ang

eles

Ban

gkok

Eng

inee

red

Bar

Sys

tem

s C

atal

og -

Jan

2016

- P

S+V

N

Dextra Engineered Bar Systems

Documents

Transcript of Dextra Engineered Bar Systems