How to tell whether a ladder is good or bad?

At present, ladders on the market have various styles and uneven quality. I'll introduce you to several simple identification methods:

First: touch the surface of the ladder with your hands, where your hands and feet can touch it, to see if it is smooth and intact, and if there are foreign objects or burrs that may hurt your skin.

Second: Does the ladder have a safety warning slogan, and does it indicate the safety standard (the European standard for general household ladders is 150kg and the national standard is 90kg) and the manufacturer.

Third: Does the material of the ladder smell, especially the plastic handle, pedal and foot cover.

Fourthly, whether the distance between the steps of the ladder pedal or pedal is too large (the standard range is between 22 and 30 cm), because if the distance is too large, it will make it difficult for users to climb when using, and it will be easy to step empty when coming down.

Fifth: after the ladder with excellent workmanship is opened, each foot should touch the ground at the same time and will not swing from side to side.