What is Steel Tie Rod
Steel tie rods are high-strength rods made of steel. They are widely used in many fields due to their durability and stability. Steel tie rod products are mainly divided into 6 categories: construction steel tie rods, bridge steel tie rods, dock steel tie rods, stainless steel tie rods and high-strength anchor rods.
Material Selection For Bridge Steel Tie Rods
Bridge steel tie rods are key components in bridge structures, supporting bridge loads and maintaining stability. Depending on the different requirements of the bridge, there are many options for the material of the steel tie rod:
- High-strength Carbon Steel Tie Rod
The most common material, with good strength and toughness, is suitable for general bridge structures, economical and practical. - High-strength Alloy Steel Tie Rod
Additional alloy elements, such as chromium and nickel, enhance its strength and corrosion resistance, making it suitable for bridges with large spans and heavy loads. - Stainless Steel Tie Rod
Due to its extremely high corrosion resistance, it is often used in bridges in humid or corrosive environments. - Low-alloy – High Strength Steel Tie Rod
It contains trace alloying elements such as silicon, manganese, and chromium, has high tensile strength and durability, and is suitable for bridges that bear heavy loads. - High-strength Weathering Steel Tie Rod
With excellent weather and corrosion resistance, it is suitable for bridges exposed to harsh weather conditions.
Steel Tie Rod Mechanical Property
| Strength level | Nominal diameter mm | Tensile strength Rm MPa | Yield strength ReH MPa | Elongation after fracture A % | Sectional shrinkage WITH % | Impact energy (longitudinal) Akw J | ||||
| 20℃ | 0℃ | -20℃ | -40℃ | -50℃ | ||||||
| ≥ | ≥ | |||||||||
| 235 | 20-210 | 375 | 235 | 21 | 50 | 27 | 27 | 27 | – | – |
| 345 | 20-210 | 470 | 345 | 21 | 50 | 34 | 34 | 34 | 27 | – |
| 460 | 20-210 | 610 | 460 | 19 | 50 | – | 50 | 45 | 34 | 27 |
| 550 | 20-210 | 750 | 550 | 17 | 50 | – | 40 | 39 | 27 | 27 |
| 650 | 20-210 | 850 | 650 | 15 | 45 | – | 40 | 34 | 27 | 27 |
Steel Tie Rod Manufacture Factory
Steel Tie Rod Structure and Parts Design
The design of steel tie rods needs to be classified according to different application requirements. To meet the needs of domestic and foreign markets for steel tie rods of different specifications and models, steel tie rods can be supplied into construction (bridge) steel tie rod series and dock steel tie rod series.
Design Of Steel Tie Rod Series For Buildings (Bridges)
The structural connection form of the 2 ends of the building (bridge) steel tie rod should be determined according to the form and distance of the connection endpoints of the engineering structure. It is mainly divided into the following basic types:
- UU Type: A U-shaped connector with threaded connections at both ends, commonly used to connect single-ear plates in structures.
- OO Type: Both ends are O-type joints or forged O-type earrings, suitable for double ear plate structures.
- OU type: one end is a U-shaped joint, and the other end is an O-shaped joint or a forged O-shaped earring, which is suitable for the structure of a single ear plate at one end and a double ear plate at the other end.
The diameter of the steel tie rod ranges from Φ20 mm to Φ150 mm, and the length can be adjusted according to demand. By increasing the number of adjusting sleeves (connectors with left-hand and right-hand threads), the length of the steel tie rod can be flexibly adjusted.
Design of Dock Steel Tie Rod Series
The dock steel tie rod is connected into one piece through a hinge plate (1-way or 2-way) and an adjustment sleeve. It is divided into the following types according to the hinge type and quantity:
- D1 Type : Contains a 1-way hinge, suitable for structures with 1-way adjustment.
- S1 Type: Contains a 2-way hinge, providing 2-way adjustment capability.
- D2 type: contains 2 1-way hinges, suitable for situations with high bidirectional adjustment accuracy.
- S2 type: contains 2 2-way hinges, suitable for structures that require 2-way adjustment.
Dock Steel Tie Rod Drawing
Steel Tie Rod Dimension
| Rod diameter D | T | C | AND | do | L | G |
|---|---|---|---|---|---|---|
| （mm） | （mm） | （mm） | （mm） | （mm） | （mm） | （mm） |
| 20 | 16 | 28 | 39 | 19.5 | 65 | M24×3 |
| 25 | 20 | 35 | 47 | 24.5 | 75 | M30×3.5 |
| 30 | 26 | 41 | 55 | 29.5 | 85 | M36×4 |
| 35 | 30 | 48 | 68 | 34.5 | 100 | M42×4.5 |
| 40 | 35 | 55 | 76 | 39.5 | 105 | M48×5 |
| 45 | 40 | 61 | 83 | 44.5 | 105 | M56×5.5 |
| 50 | 42 | 68 | 97 | 49 | 125 | M60×5.5 |
| 55 | 45 | 75 | 105 | 54 | 140 | M68×6 |
| 60 | 50 | 81 | 113 | 59 | 145 | M72×6 |
| 65 | 55 | 88 | 120 | 64 | 165 | M76×6 |
| 70 | 60 | 95 | 133 | 69 | 170 | M85×6 |
| 75 | 65 | 101 | 141 | 74 | 190 | M90×6 |
| 80 | 70 | 108 | 148 | 79 | 210 | M95×6 |
| 85 | 70 | 115 | 161 | 84 | 230 | M100×6 |
| 90 | 75 | 121 | 170 | 89 | 250 | M105×6 |
| 95 | 80 | 128 | 178 | 94 | 270 | M110×6 |
| 100 | 85 | 135 | 186 | 99 | 285 | M115×6 |
| 105 | 90 | 143 | 193 | 104 | 290 | Tr125×10 |
| 110 | 95 | 149 | 200 | 109 | 300 | Tr130×10 |
| 115 | 95 | 156 | 209 | 114 | 310 | Tr135×10 |
| 120 | 100 | 162 | 225 | 119 | 320 | Tr140×10 |
| 125 | 105 | 170 | 232 | 124 | 325 | Tr150×12 |
| 130 | 110 | 176 | 246 | 129 | 330 | Tr155×12 |
| 135 | 115 | 182 | 253 | 134 | 335 | Tr160×12 |
| 140 | 120 | 189 | 260 | 139 | 340 | Tr165×12 |
| 145 | 125 | 196 | 269 | 144 | 345 | Tr170×14 |
| 150 | 130 | 202 | 278 | 149 | 350 | Tr175×14 |
| 155 | 130 | 209 | 294 | 154 | 355 | Tr180×14 |
| 160 | 130 | 216 | 303 | 159 | 360 | Tr185×14 |
| 165 | 135 | 222 | 311 | 164 | 365 | Tr195×16 |
| 170 | 140 | 229 | 320 | 169 | 370 | Tr200×16 |
| 175 | 140 | 237 | 331 | 174 | 375 | Tr205×16 |
| 180 | 140 | 246 | 341 | 179 | 380 | Tr210×16 |
| 185 | 140 | 256 | 357 | 184 | 385 | Tr220×18 |
| 190 | 140 | 266 | 368 | 189 | 390 | Tr225×18 |
| 195 | 145 | 275 | 376 | 194 | 395 | Tr230×18 |
| 200 | 150 | 280 | 385 | 199 | 400 | Tr235×18 |
| 205 | 155 | 285 | 392 | 204 | 405 | Tr240×18 |
| 210 | 160 | 290 | 400 | 209 | 410 | Tr245×18 |
Main Application Areas Of Steel Tie Rods
- Traffic Engineering and Automobile
The use of steel tie rods in automobile manufacture is mainly for the body structure, which can be enhanced to improve stability and increase resistance to collision impact. Besides, in traffic engineering, steel tie rods can be used in guard rails on roads, road markings, lighting poles, and other facilities. - Building and Structural Engineering
In building and structural engineering, application fields of steel tie rods are reinforcement of beams, columns, and walls to increase their stability and diagonal cut resistance. They are mostly used in building projects such as bridges, huge billboards, high-rise buildings, overpasses, etc. - Power Equipment
The steel tie rods have extensive application in poles, towers, and pylons of transmission lines for carrying wires and grid structures. They are resistant to very high loads and strong winds for the stable operation of the power equipment. - Aerospace Engineering
Tie rods also play an important role in aircraft fuselage structures, engine casings, missile launch tubes, etc. Since tie rods have properties of high strength and lightweight, they can improve reliability and efficiency.
- Civil Engineering
Civil Engineering Application: steel tie rods can be used to make seismic isolation walls, prevent wind and sand, and support underground projects such as tunnels and subways. - Chemical and Petroleum Engineering
During the supporting process for certain oil and gas pipelines and some chemical equipment, steel tie rods are applied to support and fix devices to bear and fix the equipment. - Sports and Recreational Facilities
Steel tension rods widely find their applications in sports and recreational facilities for equipment such as fitness equipment, rock climbing walls, climbing frames, and zip lines; this they do to ensure safety and stability in the equipment.
High-strength Steel Tie Rods For Large Dock Construction
Shanghai Hudong Shipbuilding Group Co., Ltd. selected domestic high-strength steel tie rods for the first time in a large dock construction project. 7 specifications of dock steel tie rods were used in the project, totaling 484 sets with a total weight of 600 tons. After an on-site assessment by the China Classification Society Shanghai Branch surveyor and the project supervisor, the test results of all steel tie rods met the technical requirements and passed acceptance smoothly.
