How to do the stair handrail is the most perfect

A Engineering process Installation of embedded parts pay-off device Column handrail and column connection grinding and polishing

B Device embedded parts (post-embedded parts)
The device of the embedded parts of the stair railing can only adopt the method of post-embedded parts
First, lay out the line on the base of the civil construction. The method is to use expansion bolts and steel plates to make the rear connection parts. Determine the position of the fixed point of the column, then use a hammer drill on the stair floor to drill holes, and then install expansion bolts. After the bolts are positioned, the bolts remain long enough. Tighten the bolt and weld the nut to the threaded rod. To prevent the nuts and steel plates from loosening, the connection between the shower rod and the wall surface is also the same as the above method.

C pay off
Due to the above-mentioned post-embedded construction. Therefore, errors may occur. Before installing the column, the line should be re-laid out. If there is any deviation, determine the accuracy of the position of the embedded plate and the welding pole. Timely correction should ensure that all stainless steel columns are seated on the steel plate and can be welded around.

D device column
When welding uprights, one holds the steel pipe to keep it vertical, and two people are required to cooperate. The size of the channel steel should not be shaken during welding, and another person welding should be welded around, and should meet the welding specifications.

E Handrail and column connection

Before the installation of the column, according to the inclination angle of the stairs and the roundness of the handrail used, the line is laid out through the elongated line. The upper end is machined with a groove, and then the handrail is directly placed in the groove of the infiltration column, and the device is spot welded in sequence from one end to the other. Before the welding rod is used for welding, it is necessary to remove the oil, burrs, rust spots, etc. within the range of 30-50mm on each side of the welding seam.

F grinding and polishing

Use a portable grinding wheel grinder to smooth and sand the welds after all the welds are done. At the same time, use the corresponding polishing paste to polish with flannel grinding wheel or felt until there is no welding seam. Until it is basically consistent with the adjacent base metal and no weld is visible.