What Are T-Section Embedded Parts?
T-section steel is a type of T-shaped steel, named for its cross-section resembling the letter “T.” T section embedded plates are a further processed steel product which are fabricated from H beams by cutting and drilling, and then using a stud welding process to connect the stud to the T-section steel flange, forming embedded T-steel.
T-section steels are widely used in industries such as construction, bridge building, shipbuilding, machinery manufacturing, and chemical equipment. In building construction, they are used in steel structural frame member, for example the cruciform column; in bridge construction projects, they are used for supporting structures and load-bearing steel box beams to ensure bridge safety and reliability; in shipbuilding projects, they are used as skeletal materials to strengthen the hull; and in the machinery manufacturing industry, they are used as components or track materials such as the crane rails.
T-Section Steel Types – Split T- Section and Hot-rolled T-Section
- Split T-shaped steel is produced by directly cutting from H-section steel, and its standard is the same as that of H-section steel (GB/T11263-2017). which has advantages such as strong bending resistance. Therefore, embedded T-section plate uses H section steel as the raw material.
- Hot-rolled T-section steel is formed by hot rolling in one step and is mostly used in machinery manufacturing and small hardware fields.
T-Section Embedded Plates Features:
T-section embedded plates are mostly used in the construction of railway bridges, highway bridges, and cross-sea bridges.
They are required to have high strength and initial properties, and be able to withstand the loads and impacts of locomotives and rolling stock. They also require good fatigue resistance, certain low-temperature initial properties, and resistance to atmospheric corrosion.
T Section Embedded Plate Specification
AGICO supplies customized embedded T-section plate part made of H section steels for railway bridge project. T section embedded plate is an embedment part made of H-section steel by cutting and welding with studs. The most widely used dimensions for embedded T-Section steels include: 580*470*10, 630*580*10, 840*630*10, etc. AGICO can manufacture various sizes of embedded T-steels according to the drawings based on construction requirements.
T section Embedded Plate Details
- Manufacture Method: Split from H-section Steel
- T-beam dimensions: 380X300X195 or customized
- Steel Material: Q345B/SS400/SM490 Q355B（T section steel) , ML15/ML15A1 (Stud）
- Surface Treatment: Multi-alloy co-infiltration + passivation
- Installation Instructions
1. The installation shall be completed during steel bridge beam prefabrication, according to the construction drawings, the T section embedded plate shall be put in a fixed position on one side of the bridge beam to keep it sealed and prevent grout leakage;
2. Reinforcing bars can only be tied after the position has been calibrated.
List of Applicable Standards
AGICO supplies embedded T section plate fabricated according to the following standards or customer requirements and drawing
- TB/T3274-2011 Technical conditions for multi-alloy co-infiltration corrosion protection of railway concrete beam accessories;.
- Tongqiao ( 2017 ) 2101 Precast Post-Tensioned Simply Supported T- Beams (Steel Crossbeam Pedestrian Walkway Scheme) for 160 km/h Passenger and Freight Railway”
T-Section Embedded Plate Fabrication Process
T-section embedded plate is produced by cutting, drilling and welding. First cut off the extra part of the H section, and drill bolt holes in the precise locaiton according to drawing. Then weld the stud into the T-section steel by electric arc welding method.
The production process for the T-shaped steel embedded parts begins with the procurement and inspection of raw materials (ML15 or ML15A1), followed by cutting and drilling of the steel. After these preliminary machining steps, the components are assembled and welded. The subsequent steps include degreasing, marking, and shot blasting. Notably, casting and passivation are identified as special processes requiring strict control. Following these, the workpieces undergo baking and a final product inspection before being packaged for storage.
T Section Embedded Plate Part Workshop
Note: This process is specifically designed for AGICO’s railway concrete beam anti-corrosion accessories, ensuring the durability and corrosion resistance of the embedded plate part.
T Section Embedded Plates Application in Bridge
At present, T-section embedded plate parts are mainly used in construction and bridge engineering. For example, during the precast casting of high-speed railway bridge beams, they are embedded on both sides of the bridge beam, serving as the connection between the railway bridge beam and the pedestrian walkway. It can also be used to fabricate other structural steel members such as cruciform steel column
Embedded T-section Plate Install
After volumetric casting, the embedded T-section plate extends from both sides of the bridge, appearing as a steel plate with bolt holes. The gap between the support and the pad stone should also be filled with epoxy resin mortar, which not only ensures the density of the gap but also achieves the same strength as the pad stone. After the bridge bearing is installed, the embedded steel plate at the bridge beam bottom is connected to the bearing cover steel plate with high-strength bolts.
Pre-embedded T section steel can help secure other structural components other than sidewalk bridge beams, for example angle steel supports. It is a key element which ensures precise positioning of structural members, enhances the stability and integrity, and makes subsequent installation work easier.
AGICO also supplies customized fabrication of arc welded studs, if you are interested in bridge embedded part solutions, don’t hesitate to send a free quote now!
Why Choose AGICO
Optional Dimensions
The embedded T-section beams produced by AGICO have flange widths strictly controlled between 180-220mm, and web thicknesses are divided into 3 grades: 16mm, 20mm, and 25mm, depending on the bridge span.
For example, on a 350km/h high-speed rail line, each meter of embedded T-beam under the railroad track needs to withstand approximately 80 tons of vertical pressure. This graded dimension of embedded plate can precisely matches the load requirements of different tracks.
Material Selection
The raw material for the embedded T-steel is Q345qE developed for bridge-building steel, which has a yield strength ≥345MPa and meets the impact toughness requirement of -40℃ (impact energy ≥34J).
The performance difference between ordinary building steel and bridge steel is as follows: In fatigue tests simulating long-term vibration loads of high-speed rail, Q345qE steel showed no cracks after 2 million cycles of loading, while ordinary steel showed fatigue damage after 800,000 cycles.
Bolt Hole Drilling
AGICO adopts heat treatment process before drilling bolt holes. The embedded T section steel plate is first annealed at 600 ℃ to eliminate internal stress, and then use cnc drilling machine to drill φ22mm bolt holes, with the hole position tolerance controlled within ±0.3mm.
Within this process, we can avoid micro-cracks caused by stress concentration, as to ensuring the long-term stability of the bolted connection, so as to increase the service life of embedded part.
Submerged Arc Welding
Submerged arc welding is another crucial step to weld stud on T section steel, common stud grades are ML15 and ML15A1. We use low-hydrogen welding rods for submerged arc welding, this process is completed by certified workers following the most strict standards.
In this welding process, AGICO has strict requiremetns on 2 aspects: first is control the weld reinforcement height between 2-4mm, and ensuring 100% ultrasonic testing is performed.
