Metal expansion bolt installation (1) The concrete wall should be firm and strong, and its compressive strength should be no less than 24 MPa. The thickness of the concrete wall should be above 120 mm...
Bracket and hanger installation requirements (1) The steel used for the bracket and the hanger should be straight and without significant distortion. The length and length of the material after cuttin...
Reserved hole According to the axis part of the design icon, the prefabricated iron frame is fixed at the marked position, and straightened and straightened. After the cast-in-place concrete solidific...
Elastic line positioning According to the design drawing, determine the installation position of the electrical equipment such as the incoming line, box, box, cabinet, etc., from the beginning to the ...
