Which should be installed first, the stair railing or the floor tiles?

In stair decoration, it is usually the case that the floor tiles are laid first and then the railings are installed. The specific steps are as follows:
Lay the floor tiles first: Before laying the floor tiles, you need to fix the embedded iron first. When laying the floor tiles, use a cutting machine to cut a hole in the place where there is embedded iron, and install the stair railings after the floor tiles reach the strength.
Install the railings again: After the floor tiles are laid, wait until their strength reaches the requirements before installing the railings. During installation, you need to drill holes with an electric hammer, drive the column steel bars into the drilled holes, and insert the decorative pieces into the column steel bars, and finally fix them with square wood.
Precautions for railing installation
Base treatment: Ensure that the design elevation, position and quantity of the embedded parts meet the specifications, and carry out anti-corrosion and anti-rust treatment. The base concrete must be solid and free of looseness.
Pole installation: Start from the starting point of the stairs and install the poles one by one. Welding or bolting can be used to ensure that the poles are stable and not loose.
‌Guard installation‌: After the pole is installed, the guardrail is installed to ensure that the guardrail is stable and meets the design requirements. ‌Handrail installation‌: The handrail is usually installed by welding. Pay attention to the consistency of the welding rod material with the parent material to ensure that the handrail is stable and the interface is smooth.