It is very important to first check if the strength of the stairs is sufficient before installing the stairs. The detection method is as follows: 1. Shake the stair handrail to see if it is firm; 2. Check the connection of the tread plate and the small column head, and there is no obvious gap; 3. Now there are many phenomena of bonding the stigma with ordinary glue. However, due to the inconsistency of the strength, anti-oxidation and moisture-proof characteristics of ordinary glue, the looseness will occur after a long time, so be sure to pay attention when installing the stairs. 4. At the corner of the handrail, this place requires a high level of technology when connecting. If the technical department is in place, there will be a big gap. Although it can be covered with paint, putty, etc., the stairs itself is not so strong! Especially the connection of stair fittings such as curved curved handrails must be paid attention to. Stair fittings, in addition to the quality assurance of wood, the requirements for stair fittings are more stringent. For the installation of stairs, the quality of the parts directly affects the overall quality of the stairs. Therefore, when installing the stairs, be sure to carefully check the quality of the stair fittings. Measuring Tape,Metric Tape Measure,Rolling Tape Measure,Metric Tape SHANGQIU CHAOYUE MEASURING TOOLS CO., LTD , https://www.calibrateds.com