1, the distance from the center of the bolt to the edge of the foundation is not less than 7 times the diameter of the expansion anchor anchor bolt;
2, the strength of the foundation where the expansion anchor anchor bolt is installed shall not be less than 10MPa;
3, there shall not be any cracks at the drilled holes, and care shall be taken to prevent the collision of the drill bit with the reinforcement bars and the embedded pipe in the foundation;
4, the drilled holes' diameters and depths shall be matched with those of the expansion anchor anchor bolt. match.
Mechanical components installed on the concrete foundation, the J-shaped, L-shaped end of such bolts buried in the concrete to use. The tensile capacity of the foot bolt is the tensile capacity of the round steel itself, the size is equal to the cross-sectional area multiplied by the permissible stress value (Q235B: 140MPa, 16Mn or Q345: 170MPA) is the allowable tensile load capacity at the time of design.
Extended information:
Bolts are used in the following areas p>Bolts are used in:
Electronic products, mechanical products, digital products, electrical equipment, electromechanical products. Ships, vehicles, water conservancy projects, and even chemical experiments are also used in the bolt.
Special such as digital products above the use of precision bolts, DVDs, cameras, glasses, clocks, electronics and other micro-bolts; TV, electrical products, musical instruments, furniture and other general bolts; as for engineering, construction, bridges, the use of large bolts, nuts.
Transportation equipment, airplanes, trams, automobiles, etc. is the size of the bolts and use. Bolt in industry has an important task, as long as there is industry on earth, the function of the bolt is always important.
Baidu Encyclopedia - Ground Bolts