VSL THREAD BAR SYSTEMS

Reinforcing, Post Tensioning, Geo Technical
Marine Ties, Mining & Tunneling, Formwork Ties, Micropiles

    TABLE of CONTENTS:
• VALUE ADDED SERVICES - SYSTEMS & SOLUTIONS
• REINFORCING SYSTEMS
• POST-TENSIONING SYSTEMS
• GEOTECHNICAL SYSTEMS
• MARINE TIE ROD SYSTEMS
• MINING & TUNNELLING
• SOIL NAILS
• THREAD BAR SYSTEMS

document available in pdf format


CONSTRUCTION SOLUTIONS
VSL have been manufacturing and designing bar systems for use by the construction industry since 1971. These have proven to be one of the most popular tools of Engineers wishing to induce and control loads and forces in structures.

Recently VSL has joined with SAH to market SAS Thread Bars in ASIA PACIFIC for the construction industry.

The bar systems are available for the following applications
• Reinforcing systems
• Post-tensioning systems
• Geotechnical systems
• Micropiles
• Mining & tunneling
• Marine ties
• Formwork ties

VSL Thread Bars are available in the following grades
• B 500
• S 670
• Y 1050 / Y1035
• Y 1100


Reinforcing Systems are available in grade B500 from dia 12mm to 50mm and grade S670 from dia 18mm to 75mm respectively.

Post-tensioning Systems are available in grade Y1050 bars from dia 18mm to 47mm and in grade Y1035 from 57mm to 75mm. CT Stress Bars with architectural systems are available from 26mm to 75mm, which is ideal for application of post tensioning forces on relatively short tendons.

Geotechnical Systems are available in grade B 500 from dia 16mm to dia 50mm and in grade S670 / Y1050 from 18mm to 75mm.

In the sector of Tunnelling and Mining, VSL offers B 500 from dia 20mm to 32mm, S670 from 18mm to 30mm, S450 from 16mm to 25mm and S650 from 22mm to 30mm.

Formwork Ties are available in grade Y1100, Type FA & Type FS (weldable), the available diameters are dia 15, 20 & 26.5mm. Low Tensile Architectural bars (MT 600) are available in grade 620 from diameter 30mm to 60mm with threads on ends. Details for architectural application refer to specific catalogues.

top page

VALUE ADDED SERVICES - SYSTEMS & SOLUTIONS
• Cutting of thread bars to required length
• Bending of bars
• Torquing according to specifications
• Assembly of nail plate inner cap and other fittings
• Corrosion protection

Bend to requirements Assembled with required fittings
Corrosion Protection System
• Hot Dip Galvanized
according to DIN EN ISO 1461 thickness around 100 mm
• Epoxy Coated
according to ASTM A934 thickness around 250 mm
• Double Corrosion Protection
according to EN 1537
• Heat Shrink Sleeve
according to ISO 527, ASTM D-2240, ASTM D-638, EN 12068

• Denso Flex Tape
according to DIN 30672 and EN 12068
top page

REINFORCING SYSTEMS
VSL-SAS Thread Bars are available in two grades B 500 & S 670. The below are advantages of using our Reinforcing thread bar system.
• Screwable thread ribs along full length of the bar
• Robust, site proven cleaning thread
• Cutting or extension possible at any position of the bar
• Mechanical thread bar splicing up to 100% allowed in one section
• Thread bar diameter 12mm - 50mm with approval in most of the countries
• Galvanized or epoxy coated bars with accessories available
• B 500 - Reinforcing thread bar coupling system replaces many other bar connection systems
• Individual customized bar lengths available
• A simple and low cost solution

Coupling Bar

End Anchorage
Comparison of S670 bars over B 500 bars
• high utilization due to rearrangement
• increasing of the percentage of reinforcing from 9 to 20%
• reserves, when 670 N/mm2 is under- utilized
• S670 & B500 are weldable
• S670 up to Ψ 43 mm bendable
• B500 up to Ψ 50 mm bendable
Coupler System Assembly
Accessory Coupling system Thread bar orientation
Coupler, standard T 3003
Lock nut T 2040 / T 2003
Lengthwise moveable
and rotateable
Hexagonal coupler T 3010
Lock nut T 2040 / T 2003
Lengthwise moveable
and not rotateable
Turnbuckle T 3105
Lock nut T 2040 / T 2003
Lengthwise moveable
and not rotateable
Reducing coupler T 3102
Lock nut T 2040 / T 2003
Connecting bars with
different diameters
Contact coupler T 3006 Only for connecting
compression bars

End Anchorage Assembly
Accessory End Anchorage system Type of Load
Anchor piece T 2073
Lock nut, short T 2040
Tensile Load
Anchor nut T 2002
Anchor plate T 2139
Lock nut, short T 2040
Anchor piece T 2073
Lock nut, short T 2040
Compression Load
Anchor nut T 2002
Anchor plate T 2139
Lock nut, short T 2040
Anchor piece T 2073
Anchor nut T 2024
Alternating Load
Anchor nut T 2024
Anchor plate T 2139
top page

POST-TENSIONING SYSTEMS
VSL-SAS Thread bar is a high tensile alloy steel bar with coarse right-hand thread over its full length. The system is proven worldwide and offers versatility in a range of applications.

Manufactured in accordance with the DIN standards, the system also offers general conformance with BS4486. The system also got ETA approval. The thread bars are hot rolled quenched and tempered, followed by stretching (further tempering) operation to achieve the necessary performance.
Thread bar configurations
System Type of Thread Rolling process MAX. Bar Length Architectural
Components
available
SAS Thread Bars
18mm - 75mm
Fully threaded
(right hand)
Hot Rolled 11.85m No
CT Stress Bar
26mm - 40mm
56mm
75mm
 
Short / full thread
Short / full thread
Short thread
 
Cold Rolled
SCold Rolled
Cold Rolled
 
11.85m
7.5m
7.5m
 
Yes
Yes
Yes
MT 600 Bar
(Architectural)
30mm - 60mm
 
 
Short / full thread
 
 
Cold Rolled
 
 
11.85m
 
 
Yes

Qantas Departure Hall Project in Sydney, using CT Bars

Qatar Sports City - Y1050, dia 75 mm bars

VSL-SAS Thread Bar (d: Nominal Diameter)
 
VSL SAS THREAD BAR CHARACTERISTICS
Dimensions (mm) Nominal
Area
(mm2)
Nominal
Mass
(kg/m)
Nominal Tensile
Strength / Load
Nominal Proof
Stress (Mpa)
Minimum
Elongation at
max force %
d dA C (MPa) kN
18 21 8 241 1.96 1050 255 950 5
26.5 31 13 551 4.48 1050 580 950 5
32 37 16 804 6.53 1050 845 950 5
36 42 18 1020 8.27 1050 1070 950 5
40 46 20 1257 10.21 1050 1320 950 5
47 53 21 1735 14.10 1050 1820 950 5
57 64 21 2581 20.95 1035 2671 835 4
65 72 21 3331 27.10 1035 3447 835 4
75 82 24 4448 35.90 1035 4572 835 4

VSL CT STRESS BAR CHARACTERISTICS
Dimensions (mm) Nominal
Area
(mm2)
Nominal
Mass
(kg/m)
Nominal Tensile
Strength / Load
Nominal Proof
Stress (Mpa)
Minimum
Elongation at
max force %
d dA C (MPa) kN
26 28.2 6 531 4.40 1080 575 930 3.5
29 31.2 6 661 5.44 1080 715 390 3.5
32 34.4 6 804 6.59 1080 870 930 3.5
38 37.4 6 1018 7.88 1030 1050 835 3.5
40 41.4 6 1257 9.72 1030 1295 835 3.5
56 58.5 6 2463 19.33 1000 2460 810 3.5
75 78.1 6 4418 34.68 1000 4418 810 3.5

VSL MT 600 BAR CHARACTERISTICS
Dimensions (mm) Nominal
Area
(mm2)
Nominal
Mass
(kg/m)
Nominal Tensile
Strength / Load
Nominal Proof
Stress (Mpa)
Minimum
Elongation at
max force %
d dA C (MPa) kN
30 32.0 3 707 5.55 620 416 460 16
36 38.7 4 1018 7.99 620 515 460 16
45 47.8 4 1590 12.48 620 945 460 16
60 64.1 6 2827 22.19 620 1665 460 16

Note: d=Nominal Diameter dA=Major Diameter of Thread C=Thread Pitch
top page

GEOTECHNICAL SYSTEMS

Rock Bolt ~Ψ 20 to 40mm with grout or resin VSL offers to the geotechnical market the VSL Thread bar system for unstressed applications such as soil nails, rock bolts, micro piles and others. The bars have a characteristic quality of B500 or S670. Bar systems for both temporary and permanent applications can be supplied.

The bars meet the requirements of the relevant norms and standards. Both qualities are hot rolled with a coarse thread over the entire length.

B500: Left hand thread as well as right hand up to Ψ 75mm

S670: Right hand thread up to Ψ 75mm

The bars have a higher ductility (class H according to Eurocode 2)
Rock Bolt ~ψ 20 to 40mm with grout resin
Coupler for length extension
Expansion Shell
With/without grout

System Components

The VSL Bar systems comprise all system components usually required for geotechnical applications. Details can be found in the inserts. Special components can be supplied on demand.
Corrosion Protection

The type of corrosion protections elected for unstressed bars depends on the duration of use, the potential damage in case of failure of a group of nails as well as on the prevailing environmental conditions.
Both temporary and permanent systems are available and VSL offers the range of corrosion protection option as specified in the Norms, such as the Swiss code SIA V191/1. Generally the corrosion protection shall vary according to environment and project specifications.


Micropile ~Ψ 25 to 63.5mm
Tests carried out at the Federal Institute for Testing Materials and Research in Dόbendorf/Zurich demonstrate the suitability of both types of bars.

Services of VSL
VSL are in a position to offer beyond the supply of micropiles, soil nails and rock bolts - the following services:
• Pre-design and consultancy services to Engineers and contractors
• Installation, grouting and supervision
• Rental or sale of equipment such as jacks, pumps, mixers and torque wrenches
• Execution of anchor and micropile tests
In addition to our unstressed VSL anchors, we also offer post-tensioned anchors according to Swiss code SIA V191, including electrically isolated anchors for permanent use. For these applications, we can supply adequate documentation. Anchors in accordance with other codes and specifications can also be supplied. We can undertake anchor load controls on anchors which have already been installed, even when the anchor head has no thread and the protruding length of the strand is not sufficient for normal retensioning.

Advantages
The robust coarse thread for both bar types means the system is very user friendly on site, components remain threadable despite the usual site conditions and the bar can be easily cut or coupled resulting from unforeseen changes on site. The bar has a very good bond behavior. The characteristics of the S670 bar are such that the diameters of the installed threadbar, when subjected to tension only, can be reduced by 1 unit and thus economical solutions both in materials and drilling can be achieved. For example, a Ψ 32mm B500 bar has a working load of 250kN (according to the DIN Norm); the same working load can be achieved with a Ψ 28mm S670bar. This is also valid for combined stresses if corresponding checks are carried out.

Quality Assurance
The production of both types of bars and system components is carried out according to ISO 9002.
B 500 / S 555 Bar characteristics
Dimensions (mm) Nominal Area (mm²) Nominal Mass (kg/m) Nominal Tensile Strength/Load Nominal Proof Stress (Mpa) Working Load Fd (Din 1045) Minimum Elongation at max force %
d dA C (Mpa) Kn
12 14 7 113 0.89 550 62 500 32 6
14 16 7.5 154 1.21 550 85 500 44 6
16 19 8 201 1.58 550 110 500 57 6
20 23 10 314 2.47 550 175 500 91 6
25 29 12.5 491 3.85 550 270 500 140 6
28 32 14 616 4.83 550 340 500 177 6
32 36 16 804 6.31 550 440 500 231 6
40 45 20 1260 9.87 550 690 500 360 6
50 56 26 1960 15.40 550 1080 500 560 6
63.5 70 21 3167 24.86 700 2215 555 1006 5

S 670 Bar characteristics
Dimensions (mm) Nominal Area (mm²) Nominal Mass (kg/m) Nominal Tensile Strength/Load Nominal Proof Stress (Mpa) Working Load Fd (F0.2k) Minimum Elongation at max force %
d dA C (Mpa) Kn
18 21 8 254 2.00 800 204 670 170 5
22 25 8 380 2.98 800 304 670 255 5
25 28 10 491 3.85 800 393 670 329 5
28 32 11 616 4.83 800 493 670 413 5
30 34 11 707 5.55 800 565 670 474 5
35 40 14 962 7.55 800 770 670 645 5
43 48 17 1452 11.40 800 1162 670 973 5
57.5 63 20 2597 20.38 800 2077 670 1740 5
63.5 70 21 3167 24.86 800 2534 670 2122 5
75 82 24 4418 34.68 800 3535 670 2960 5

top page

MARINE TIE ROD SYSTEMS
The construction of heavy marine bulkhead for various docking facilities uses our TIE rod system. Docking facilities for barge, ship and offshore facilities have found the system to be cost effective.

The continuous rolled on threads provide contractors much more flexibility during installation. The self cleaned and rugged threads eliminate the problems of acquiring dirt at various site locations. Longer thread bars help to accommodate or adjust for the minor misalignment occurs during sheet piling installation.

The higher strength to weight ratio together with the elimination of strength loss due to threading allow engineers to specify a more efficient product.

Tie Rods are available at grade B 500, S670, S1050 & S1035.

Marine works - Ras al kaimah port Phase 1, UAE


Sheet Pile Anchorage Details

top page

MINING & TUNNELLING
VSL offers three type of bolting system for the mining & Tunnelling industry VSL-S Solid Threaded bolts. Continuous Hot rolled threaded bars in grade B500, S670, B450& S650. VSL-B Self drilling Injection Anchor Bolts. Self Drilling Anchor bolts are used for anchoring in poor ground, cohesive and non cohesive soils and in case of unstable bore holes. Also used for reinforcement ahead of the tunnel face in terms of spiles or umbrella support or other support application VSL-E Expansion or Friction bolts. The Expansion bolt is temporary rock reinforcement in mining & tunnelling, bonding forces between the friction bolt and rock masses are caused by form closure and friction transfer between the bore hole wall and the bolt which is expanded by waterpressure.

All our bolts are produced in Europe at various locations, well established Manufacturing Quality Control System, National & International Approvals are available.

VSL-SAS thread bar systems B450 & S600 are used in Mining application and B500 & S670 are used in Tunneling applications, details are available in specific catalogues. The bars are prepared at ends with point tip, chisel tip or saw tip.
VSL-SAS systems available in different applications:

• Fully grouted anchors
• Resin anchors
• Expansion shell anchor
 

Expansion shell anchor

Resin anchor


Saw tip

Chisel tip Saw tip

Point tip Saw tip

Expansion shell bolt
• Shape of thread ribs make SAS thread bars resistant against rough handling
• Continuous thread profile guarantees good bonding characteristics between bolt and grout or resin interface
• High working capacity and elongation as well as high shear strength
• For mining applications only naturally hard SAS thread bars are allowed
• High working capacity due to high-ductile SAS thread bars: ratio fu/fy = 1, 2 - 1, 5
• New developed thread bar S 650 Ψ 22 mm with higher charpy impact value of 27 Joule according to new drafted British Standard BS 7861
top page

SOIL NAILS
Soil nails are used for stabilizing slopes and excavations. They find an efficieint application in granular soils of medium to high density with sufficient internal friction, so that a good load transfer along the soil nail is possible, and only slight creep movements occur in the supported soil mass. The soil nails are installed as the excavation progresses from top to bottom.
VSL-SAS system is widely used for soil nails to reinforce existing ground.

Advantages of our system
• Can be used for temporary and permanent applications
• Simple components, easy to install and test
• Durable threads, allows splicing at any point along the length.
• High tensile and shear strength
• High ductility
• High bond strength
• Ability to accommodate structural and non structural face attachments

Cap d'Ail - Lou Clapas, France
Temporary nail
Single corrosion protection (SCP) (service life 2 years)
1. Anchor nut
2. Domed or flat bearing plate
3. Thread bar
4. Cement grout
5. Spacer

Permanent nail
Double corrosion protection (DCP) (service life > 2 years)
1. Anchor nut
2. Domed or flat bearing plate
3. Thread bar
4. Cement grout
5. Corrugated sheathing
6. Spacer

Temporary nail

Permanent nail
top page

THREAD BAR SYSTEMS

VSL Thread-Bars
yield stress / ultimate stress
areas of application
nom. -Ψ yield load ultimate
load
cross
section
area
weight elongation
[N/mm²] [mm] [kN] [kN] [mm²] [m/to] [kg/m] Agt A10
SAS 500 (BSt 500 S) / grade 75
B500/550
reinforcing system


geotechnical system
12 57 62 113 1123.6 0.89 6 10
14 77 85 154 826.4 1.21
16 100 110 201 632.9 1.58
20 160 175 314 404.9 2.47
25 245 270 491 259.7 3.85
28 310 340 616 207.0 4.83
32 405 440 804 158.5 6.31
40 630 690 1260 101.3 9.87
50 980 1080 1960 64.9 15.40
    SAS 555 / 700 grade 80*1) 63.5 1760 2215 3167 40.2 24.86    5
alternative SAS 550 (BSt 550 S) grade 75 available
SAS 450 / grade 60
S 450 / 700
mining
16 93 145 207 617.3 1.62 15
(A5)
25 220 345 491 259.7 3.85
SAS 650 / grade 90
S 650 / 800
mining
22 247 304 380 335.6 2.98 18
(A5)
25 319 393 491 259.7 3.85
28 400 493 616 207.0 4.83
30 460 565 707 180.2 5.55
SAS 670 / grade 97
S 670 / 800
geotechnical system


tunneling / mining
18 170 204 254 500.0 2.00 5 10
22 255 304 380 335.6 2.98
25 329 393 491 259.7 3.85
28 413 493 616 207.0 4.83
30 474 565 707 180.2 5.55
35 645 770 962 132.5 7.55
43 973 1162 1452 87.7 11.40
57.5 1740 2077 2597 49.1 20.38
63.5 2122 2534 3167 40.2 24.86
75 2960 3535 4418 28.8 34.68
SAS 950 / 1050 / grade 150
Y 950 / 1050
post-tensioning systems*2)
18 230 255 241 510.2 1.96 5 7
26.5 525 580 551 223.2 4.48
32 760 845 804 153.1 6.53
36 960 1070 1020 120.9 8.27
40 1190 1320 1257 97.9 10.21
    Y 950 / 1050 47 1650 1820 1735 70.9 14.10    5    7
    Y 835 / 1035 57 2155 2671 2581 47.7 20.95 4 7
65 2780 3447 3331 36.9 27.10
75 3690 4572 4418 27.9 35.90
CT 1080
    930 / 1080
    post-tensioning systems

    835 / 1030
    810 / 1000
26 495 575 531 227.3 4.40 3.5
29 615 715 661 183.8 5.44
32 750 870 804 151.7 6.59
38 850 1050 1018 127.2 7.86
40 1050 1295 1257 102.9 9.72
56 1995 2460 2463 51.7 19.33
75 3580 4418 4418 28.8 34.68
SAS 900 / 1100 - type FA / grade 160
Y 900 / 1100 - Type FA
formwork ties   weldable
15 159 195 177 694.4 1.44 3 7
20 283 345 314 390.6 2.56
    Type E*1) 26.5 461 568 551 223.2 4.48    4    7
SAS 850 / cold rolled grade 120
S 850 - Type FS
formwork ties   weldable
15 140 170 191 666.7 1.50 10
(A5)
20 245 280 331 384.6 2.60
26.5 385 490 586 217.4 4.60
MT 600
   460 / 620
   architechtural
30 309 416 707 180.2 5.55 16
(A5)
36 441 595 1018 125.2 7.99
45 701 945 1590 80.1 12.48
60 1235 1665 2827 45.1 22.19
   note:
   - accessories for all dimensions and applications available
   - *1) = DIBt approval
   - *2) = ETA approval











Bar Anchors / Soil Nails

Securing of slopes and embankments High efficiency for permanent and temporary applications
Micropiles

Securing of up-lift forces (tension) and foundations (compression) as well as alternating loads
Securing dams, high rise buildings and other constructions in seismic areas
Rock Bolts

Securing of rock walls, Tunnels and caverns, Mesh fixing, Avalanche protection
For details information on accessories, refer to individual catalogues. Other Applications

Tension members, Suspension masts, Foundations, Repair & strengthening
top page

The information set forth in this brochure including technical and engineering data is presented for general information only. While every effort has been made to insure accuracy, this information should not be used or relied upon for any specific application without independent proffessional examination and verification of its accuracy, suitability and applicability. Anyone using this material assumes any and all liability resulting from such use. VSL disclaim any and all express or implied warranties of merchantability fitness for any general or particular purpose or freedom from infringement of any patent, trademark, or copyright in regard to the information or products contained or referred to herein. Nothing herein contained shall be construed as granting license, express or implied under patents.


end of document