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High strength bolts are made of high strength materials. The screw, nut and washer of the high-strength bolt are made of high-strength steel.
High strength bolts transmit external forces by applying pretension and friction.
High strength bolts are generally used for permanent connections.
High-strength bolt connection has the advantages of simple construction, good mechanical performance, disassembly, fatigue resistance, and no loosening under dynamic load, so it is a promising connection method.
| Class 8.8 high strength bolt construction torque value reference table | ||||||||
| S.Q | Bolt specification | Bolt performance class | Standard value of construction pre-tension (KN) | Torque coefficient (standard deviation less than or equal to 0.010) | Initial torque (N*m) | Final torque (N*m) | Measured torque coefficient | Final torque (N*m) |
| 1 | M16 | 8.8s | 75 | 0.11~0.15 | 78 | 132~180 | 0.121 | 145 |
| 2 | M20 | 8.8s | 120 | 0.11~0.15 | 156 | 264~360 | 0.123 | 295 |
| 3 | M22 | 8.8s | 150 | 0.11~0.15 | 215 | 363~495 | 0.125 | 413 |
| 4 | M24 | 8.8s | 170 | 0.11~0.15 | 265 | 448.8~612 | 0.125 | 510 |
| 5 | M27 | 8.8s | 225 | 0.11~0.15 | 395 | 668.3~911.3 | 0.125 | 759 |
| 6 | M30 | 8.8s | 275 | 0.11~0.15 | 536 | 907.5~1237.5 | 0.125 | 1031 |
| Class 10.9 high strength bolt construction torque value reference table | ||||||||
| S.Q | Bolt specification | Bolt performance class | Standard value of construction pre-tension (KN) | Torque coefficient (standard deviation less than or equal to 0.010) | Initial torque (N*m) | Final torque (N*m) | Measured torque coefficient | Final torque (N*m) |
| 1 | M16 | 10.9s | 110 | 0.11~0.15 | 114 | 193.6~264 | 0.122 | 215 |
| 2 | M20 | 10.9s | 170 | 0.11~0.15 | 221 | 374~510 | 0.12 | 408 |
| 3 | M22 | 10.9s | 210 | 0.11~0.15 | 300 | 508.2~693 | 0.126 | 582 |
| 4 | M24 | 10.9s | 250 | 0.11~0.15 | 390 | 660~900 | 0.125 | 750 |
| 5 | M27 | 10.9s | 320 | 0.11~0.15 | 562 | 950.4~1296 | 0.125 | 1080 |
| 6 | M30 | 10.9s | 390 | 0.11~0.15 | 761 | 1287~1755 | 0.125 | 1463 |
| GREAT WALL STEEL BRIDGE SPECIFICATION | ||
| GREAT WALL STEEL BRIDGE | Bailey bridge(Compact-200, Compact-100, LSB, PB100, China-321,BSB) Modular bridge( GWD, HBD60,CB300,Delta, 450-type,etc), Truss Bridge,Warren bridge, Arch bridge, Plate bridge,Beam bridge,Box girder bridge, Suspension bridge,Cable-stayed bridge, Floating bridge,etc | |
| DESIGN SPANS | 10M TO 300M Single span | |
| CARRIAGE WAY | SINGLE LANE, DOUBLE LANES,MULTILANE,WALKWAY,ETC | |
| LOADING CAPACITY | AASHTO HL93.HS15-44,HS20-44,HS25-44, BS5400 HA+20HB,HA+30HB, AS5100 Truck-T44, IRC 70R Class A/B, NATO STANAG MLC80/MLC110. Truck-60T,Trailer-80/100Ton,etc Korea 1st grade bridge DB24 | |
| STEEL GRADE | EN10025 S355JR S355J0/EN10219 S460J0/EN10113 S460N/BS4360 Grade 55C AS/NZS3678/3679/1163/Grade 350, ASTM A572/A572M GR50/GR65 GB1591 GB355B/C/D/460C,etc | |
| CERTIFICATES | ISO9001, ISO14001,ISO45001,EN1090,CIDB,COC,PVOC,SONCAP,etc | |
| WELDING | AWS D1.1/AWS D1.5 AS/NZS 1554 or equivalent | |
| BOLTS | ISO898,AS/NZS1252,BS3692 or equivalent | |
| GALVANIZATION CODE | ISO1461 AS/NZS 4680 ASTM-A123, BS1706 or equivalent | |
Q: Which countries do you export to?
A: Our company's products have been exported to dozens of countries and regions. Including: Nepal, Cambodia, Laos, Vietnam, Malaysia, Myanmar, Philippines, Ecuador, Colombia, Barbados, Trinidad and Tobago, Dominica, Papua New Guinea, Solomon Islands, Kenya, Tanzania, Zambia, Congo, Tajikistan, Georgia, etc.
Q: Are you a factory or a trade company ?
A: We are an industry and trade company. The factory covers an area of 47,000 square meters, the production workshop is 22,000 square meters, and the office area is 5,000 square meters. It has 12 production lines of Bailey Bridge, various steel Bridges and various steel structure products, with a lifting capacity of 100 tons. Annual output is more than 50,000 tons. The company has its own import and export rights, with 20 years of export business experience.
Q: Do you accept custom processing?
A: Our company has an efficient and flexible technical team, we can process custom-made a variety of non-standard Bailey bridge, steel bridge, steel structure.
Q: Can your company meet American standards?
A: Yes, our products not only meet the AASHTO American standard, but also meet the British BS5400, Australia AS5100 and other international standards.
Q: Which airport is the nearest to your company? Can I visit your company anytime?
A: The nearest airports are Nanjing Lukou International Airport and Shanghai Pudong International Airport. You can visit our company anytime, our company will issue an invitation letter and arrange to pick you up according to your needs. Your transportation and accommodation during your visit to our company will be arranged by our company.
Q: Could you send me some hard copies of your catalogues?
A: Sure. Please send us your address and contact information and we will send it to you by international express as soon as possible.
Q: Can we be your agent or distributor?
A: Our company is recruiting powerful partners all over the world for common development and win-win . Look forward to long-term cooperation with you!
A: We will give professional and technical feedback within 6 hours after receiving your inquiry . After communicate the technical parameters,we will provide quotation and preliminary design within 24 hours.