Prestressed Steel Products

Prestressing steel is a special type of steel used to increase the load carrying capacity, stiffness and stability of structural members, as well as to improve the stress state of the structure and save materials. Its characteristics are as follows:
High strength. Prestressing steel has high tensile strength and yield strength, usually using high-strength low alloy steel as raw material.
High toughness. Prestressed Steel Products has good toughness and can maintain overall stability when subjected to large bending and twisting deformation.
Corrosion resistance. The surface of prestressing steel usually has a layer of corrosion-resistant oxide film, which can effectively prevent the intrusion of corrosive media, making it suitable for a variety of corrosive environments.
High vibration resistance. Due to its high strength and toughness, Prestressed Steel Products can absorb a large amount of seismic energy when an earthquake occurs, reducing structural damage.
Low relaxation. Certain types of prestressing steel have low relaxation, meaning that the material relaxes less under sustained loads.
Strong grip with concrete. Prestressing steels have a strong grip on concrete, which helps improve the performance of concrete structures.
Good weldability and upsetting. Prestressed Steel Products exhibits good performance during welding and machining.

1. Storage
Prestressing steel should be stored in a dry warehouse. Open air and on-site storage. The steel should be stored in the open air and on the spot. Sleepers should be set up on the ground, direct contact with the wet ground should be prohibited, a tarpaulin should be added or a rain-proof shed should be erected to shorten the period of storage as far as possible, and rust-proof packaging should be used in the ordering process for the special environment. Prestressing steel surface rust does not affect the use, but rust into a visually visible "pockmarks" will affect its mechanical properties.
2. Lifting
Prestressing steel should be lifted in sequence, stacked in an orderly manner and left with gaps. Unbonded prestressing tendons should be selected with three brown rope grommets parallel lifting, prohibit the use of wire rope directly lifting. Rolled strand should be lifted by forklift or special lifting thing, in order to prevent breaking the steel band to form loose packages.
3. Application
(1) It is prohibited to use any kind of heating and deformation measures in the application of prestressing steel to avoid decreasing the mechanical properties of prestressing steel.
(2) Welding is prohibited in the application, because the strength of welded joints is much lower than the strength of the steel itself, and it is easy to break the wire at the welded joints in the tensioning.
(3) Cutting of prestressing steel should be done with a toothless card. It is easy to damage the surface around the steel by electric or gas welding. Together with the formation of the end part of the heating, so that the performance of a significant decline.
(4) When the pre-stressing steel wire is used for cyclic reinforcement, the zigzag radius shall not be less than 3 times of the diameter of the steel wire.
(5) The stranded wire packed in a reel without shaft shall be released from the inner ring under the state of standing, and the stranded wire shall be tautly spring-shaped and automatically straightened after being withdrawn. Tap direction: the helical direction of the taut spring shape after the tap and twisted wire twisted to the same direction, otherwise it will be twisted or messy line.
(6) The twisting direction of the stranded wire is generally left twisted, the right twist should be specified in the contract, otherwise it will directly affect the coordination with the anchorage.
(7) The quality of header of prestressing steel wire is not directly related to the quality of the steel wire itself, but too high strength will be unfavorable to the quality of header of the steel wire, so when you choose header anchorage, you should make it clear to our company in the order.
4. Acceptance
(1) Acceptance of prestressing steel shall be carried out in accordance with the relevant national norms, and the experimental instruments shall be national legal measuring instruments, and shall be in accordance with the provisions of the experimental norms.
(2) Quality problems arising in the acceptance should be noted to check whether the following items are in accordance with the regulations:
• Whether to choose the latest national norms and experimental methods for acceptance.
• Selection of the experimental machine tonnage is appropriate; measurement is accurate; whether the steel fracture for the card break; whether to choose the nominal area of the calculation of strength.
• Zigzag test machine zigzag bayonet whether it is in line with national norms, bayonet surface finish, dial hole height, experimental zigzag angle whether it is in line with the norms.
• Determination of steel elongation should be selected with sharp, standardized marking interval things, and no damage to the steel surface.
• Steel itself has no hosting the formation of severe corrosion or artificial surface damage.
5. Laying line
Prestressing steel in the use of pre-stressing steel must be used before the release machine release line.

Suzhou Yogiant Holdings Company Limited, was founded on May 26th, 2015, with the registered capital (actual subscription) of 159 million yuan. Yogiant specializes in the international and domestic trade of steel, construction materials, machinery and equipment, with great business range covering steel products, special equipment and accessories for concrete pile industry and concrete products. With the development of three years, Suzhou Yogiant has gradually built its well-established service networks in Shanghai, Guangdong, Zhejiang, Shandong, Jiangsu, Tianjin and Hebei, and also has set up the overseas service networks in Hong Kong, Ho Chi Minh and Jakarta. Suzhou Yogiant has adhered to its business philosophy of "honest operation, mutual benefit and win-win cooperation" and advocated the idea of "regarding suppliers as source, employees-oriented and customers go first" since its foundation in 2015. Yogiant would like to make full use of its advantages in resources, capital and creditability, and continuously develop new business areas, and sincerely provide customers with quality products and services.
Be professional at work, and be grateful in life. Suzhou Yogiant always follows this principle and keeps pace of the times. The "partnership" mechanism is adopted in Yogiant's recruitment to attract more talented people, which also clearly demonstrates its core value of "co-building, sharing and win-win cooperation". Yogiant is dedicated to setting up an excellent platform for comprehensive trade and service, thereby creating more value for its customers, suppliers, employees and shareholders.