Changsha DLADTO Rebar Splice Co., Ltd

We can judgment standard of   rebar joints   with the following regulations: 01 Grade I Joint There are two criteria for judging Grade I Joints: 1) The actual tensile strength of the reinforcing bar connection must be greater than the standard strength of the reinforcing bar material and it should fracture at the reinforcing bar. 2) If the connecting piece does not break the reinforcing bar, the actual tensile strength of the reinforcing bar connection must be greater than 1.1 times the standard tensile strength of the material, reaching at least 594Mpa to be considered qualified. The standard tensile strength value for HRB400 reinforcing bar is 540Mpa. 02 Grade II Joint The criteria for judging Grade II Joints is that as long as the actual tensile strength value of the reinforcing bar connection exceeds the standard tensile strength value of 540Mpa, regardless of where the connecting piece breaks, it can be considered qualified. 03 Grade III Joint The criteria for judging Gra...

Although the advantages of   mechanical splices   are well recognized, a major concern has been their high cost for applications where the codes permit the use of lap splices. But is the perception that mechanical splices cost more than lap splices a reality? By using couplers, contractors can be more cost efficient, able to achieve from 20-50% of cost savings compared to lap splicing. Apart from that, there are many other savings which can be anticipated such as; Reduction no. of joints 6 meters length will be most ideal for joining and this would result in reduction of no. of laps by, Assuming height of building: 100 metres Typical floor height: 3.2 metres No. of laps: 100 / 3.2 = 31 laps No. of coupler joints: 100 / 6 = 16 joints Therefore reduction in no. of laps: [(31-16)/31] x 100% = 48% Minimal wastages of HTDBs Assuming floor height of 3.2m and lap length of 1.275m Length of steel bar per floor is : 3.2m + 1.275m = 4.475m For a 12metres steel bar, two nos of 4.475metre...

  Cost Effectiveness The conventional method of connecting reinforcement bars with lap joints in reinforced concrete need not be always appropriate. Advantages of simplicity and economy in lap splicing is limited to smaller diameter bars, mechanical couplers offer the solution for splicing when large diameter bars are involved like 20，25，32 and 40mm Diameter where huge cost saving can be done. Structural Reliability Coupler spliced perform like continuous reinforcement. That develops full tensile strength mechanically, independent of concrete. Coupler splices are excellent for severe condition like earthquake, typhoon, especially suitable for condition that demands higher ductility of building structure. Designers Friendly Rebar-join coupler reduces rebar congestion and improves concrete flow & consolidation. It offers greater flexibility in design options. The simplicity in detailing of reinforcement, particularly in reinforcement congestion zones minimizes the reinforcement f...

Rebar reducing sleeve   are used to connect steel bars of different diameters. The rebar reducing sleeve models are 18 to 16, 20 to 18, 22 to 20, 22 to 18, 25 to 22, 25 to 20, 25 to 18, 28 to 25, 28 to 22, 32 to 28, 32 to 25 , 36 to 32, 36 to 28, 40 to 36mm, etc. Rebar reducing sleeve can be widely used in reinforced concrete structure engineering in steel bars in various industrial and civil buildings. It is especially suitable for high-rise buildings, roads, bridges, subways, tunnels, power stations, dams and other buildings and structures with high explosion-proof and earthquake-proof requirements. Changsha DLADTO Rebar Splice Co., Ltd  as a division of  ADTO Group . We are a professional rebar coupler producer, we have been in this field for a long time with customers for all over the world. Welcome to contact us for any inquiry.

In the building construction, steel bar is an indispensable material, and steel bar joints are an important part to connect steel bars in construction. According to different connection strength requirements and connection methods,   couplers   can be divided into first-level joints, second-level joints, and third-level joints. What is the difference between them? 1. Different mechanical properties Grade I joint: the tensile strength of the joint is greater than or equal to the actual tensile strength of the steel bar to be connected or 1.10 times the standard value of the tensile strength of the steel bar, and it has high ductility and repeated tension and compression properties; Class II joint: the tensile strength of the joint is not less than the standard value of the tensile strength of the connected steel bar, and has high ductility and repeated tension and compression properties; Grade III joint: The tensile strength of the joint is not less than 1.25 times the standard...

Extend rebar coupler  is designed for long, large, and dense bars being installed on site, and it is not convenient to rotate the re-bars. The extended rebar coupler is longer than the normal steel couplings. Product advantages:  1. Raw material-saving, high energy saving, high work efficiency. 2. Construction environmental protection. No flame, no noise pollution. 3. It is not be affected by the chemical compositions and types of reinforced bars and won't be influenced by weather and work-site. 4. Low cost, simple operation. 5. Can be prefabricated and the construction period can be shortened. 6. High dimension precision, reliable quality and stable performance. 7. High strength. The tensile strength usually more than 600 Mpa, it can reach 110% of yield strength of parent rebar. 8. After 2 million times of fatigue strength test, the connection is in good condition. 9. According to the inspection of national construction quality supervision and testing center, the rebar couple...

  Advantages of   rebar upsetting machine : 1. Simple operation, hydraulic and electrical control, no need for professional skills, and it can be turned on and operated after short-term training. 2. Expand the cross-sectional area of the end of the steel bar by 15-20%, so that the bottom diameter of the processed thread is not less than the diameter of the base material of the steel bar.  3. The steel bar upsetting machine has high production efficiency, upsetting 1 end in 10-15 seconds.  4. The processing range of steel bars is wide, and the steel bars with diameters of 16-40 can be processed.  5. It has the advantages of light weight, generous appearance, fast speed and flexible use. 6. The steel upsetting machine is environmentally friendly, safe and not affected by the environment and climate