来源： 最后更新时间：2025-02-10 14:10:20 人气：100423

At present, the mechanical steel bar joint connection method is the main method 

for connecting steel cages in the construction process, because this method has 

high requirements for the neutrality of the main reinforcement when connecting

 steel bars. It is worth mentioning that the construction speed of mechanical s

teel bar joint connection method is extremely fast, and it is very material saving, 

which is currently the main development direction of steel bar connection in the

 construction industry.

Reinforcement joint grade

Level 1: The tensile strength of the joint is equal to the actual tensile strength of the connected steel bar or not less than 1.10 times the standard tensile strength of the steel bar, with minimal residual deformation and high ductility and repeated tensile and compressive performance.

Level 2: The tensile strength of the joint shall not be less than the standard value of the tensile strength of the connected steel bar, with minimal residual deformation and high ductility and repeated tensile and compressive performance.

Level 3: The tensile strength of the joint shall not be less than 1.25 times the standard yield strength of the connected steel bar, with minimal residual deformation and ductility and repeated tensile and compressive properties.

The connection method of building steel bar joints:

The connection method of steel bar sleeves is to use a rolling machine to drill and remove a part of the longitudinal and transverse ribs at the top of the building steel bars to be connected, and then immediately roll them into half straight external threads, and connect them with specially made steel bar sleeves to produce the connection of building steel bars. The technology of straight threaded connection formed by rib stripping and extrusion of building steel bars has reached an international excellent level; The technology of rib stripping extrusion forming straight thread connection has been favored by many construction enterprises and community owners due to its convenient, fast, and efficient construction methods, as well as its advantages of energy conservation, emission reduction, improvement of production and manufacturing economic benefits, and stable and reliable connection quality. It is a new type of product with straight thread connection technology.

Installation process of building steel reinforcement sleeve:

Attention must be paid to the installation of steel reinforcement sleeves in the application of building steel reinforcement sleeves, so as to prevent some unnecessary technical problems from endangering the product quality of the steel reinforcement sleeves.

1. Construction steel bars in place: Transport the steel bars that have passed the wire head inspection to the construction site for connection.

2. Tighten the connector: Use a wrench to tighten the specification of the connecting sleeve during the operation of the building steel reinforcement sleeve.

3. Marking: Mark the specifications of sleeves that have already been tightened to distinguish them from those that have not been tightened.

4. Engineering construction inspection: a product quality inspection conducted on the connectors after the completion of engineering construction.

5. Tie other building steel bars together.

规格	外径	长度	内孔	牙型角	螺距
12MM	19	35	11	75	2.5
14MM	21	35	11.7	75	2.5
16MM	24	40	14.7	75	2.5
18MM	27	45	16.5	75	2.5
20MM	30	50	18.5	75	2.5
22MM	32.5	55	20.5	75	2.5
25MM	37	60	23.5	75	3
28MM	41	65	26.5	75	3
32MM	47	75	30.3	75	3
36MM	53	85	34.5	75	3
40MM	58	90	37.5	75	3
The national standard size parameters for steel bar joints. If you need other sizes,  please contact us for clarification. Company: mm

If the customer does not provide a definite type and specification of the sleeve, the customer should correctly explain their type, specification, and requirements, and sign the contract under the condition of mutual understanding between the supply and demand parties。

　1、The customer communicated the product type, specifications, and dimensions to our salesperson。

　2、Received customer specifications and dimensions, provided sleeve quotation (price list) for the customer。

　3、Specific agreement: delivery time, special requirements, and other matters。

　4、After placing the order and making payment, our company will arrange shipment as soon as possible。

Steel bar joints can be widely used in reinforced concrete structural engineering in various industrial and civil buildings. Especially suitable for steel bar connections in high-rise buildings, roads, bridges, subways, tunnels, power stations, dams and other buildings and structures with high requirements for explosion prevention and earthquake resistance. The steel bar connection sleeve is suitable for the same or different diameter connection of HRB335, HRB400, and HRB500 grade steel bars with a diameter of 14 to 40 in beam, slab, and column foundations in any part and direction. It can also be used as a pre embedded joint for steel bars.

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