The rebar sleeve is the steel bar connection sleeve, also called the rebar connector, which is used to connect two independent steel bars together. According to their own tensile strength, compressive strength and other properties, steel sleeves are divided into first-class steel, second-grade steel and third-grade steel. What is the grading standard of steel bar sleeves, and what are the differences between different grades of steel bar sleeves?
1. A steel bar sleeve with a tensile strength greater than or equal to 1.1 times the ultimate tensile strength of the steel bar is a first-class steel bar connection sleeve. The first-class steel bar sleeve has the best tensile performance and is suitable for parts that require high tensile strength.
2. The steel bar sleeve with tensile strength greater than or equal to the standard value of the ultimate tensile strength of the steel bar is a second-class steel bar sleeve. The tensile performance of the secondary steel bar sleeve is moderate, which can meet most of the steel bar connection requirements, and is the most cost-effective and most used.
3. A steel bar sleeve with a tensile strength greater than or equal to 1.35 times the standard value of the yield strength of the steel bar is a third-class steel bar sleeve. The three-stage steel bar sleeve is suitable for the parts of the concrete structure that do not require high tensile strength, and is less used in actual construction.