How to choose a sturdy ladder

Consider the material of ladder: 1. Iron. It is made of ordinary iron, and the outer layer is painted, taking into account the waterproof and antirust characteristics and firmness. It is slightly heavy, and the paint surface is easy to fall off for a long time, so it is not suitable for long-term outdoor operation. 2. Stainless steel. It is made of stainless steel, which can be waterproof and anti-oxidation without painting. Its weight is not different from that of ordinary iron ladder. 3. Aluminum alloy. The aluminum ladder has the characteristics of waterproof, rust proof, firmness and portability. The disadvantage is that the price is slightly higher.

Consider the structure of ladder: there are usually two kinds of structures for household use: one is the one-sided ladder with fixed opening posture and fixed by brace + gusset plate. This type of ladder has complex structure, but it is convenient to use and is more suitable for household use;
Second, the opening posture and angle are uncertain. The two-sided ladder is fixed with independent locking device. This type of ladder has simple and reliable structure and looks more professional.
strong and lightweight, but the disadvantage is that the price is slightly higher.

Consider the hardness of the ladder: 1. See the hardness. On the premise of portability, the ladder with thick wall, no trauma and solid material is preferred.

Consider the insulation characteristics of the ladder
Insulation characteristics. Anti slip and insulated foot sleeves shall be installed at the ladder feet to meet the needs of electrician's working environment.

Considering the process of ladder
1. First open the ladder and have a look. If the ladder squeaks as soon as it is opened, it is definitely not a good ladder. When a good ladder is opened and closed, there is no sound.

2. Take a look at the welded products. The welded part must be the fish scale sample as the standard. 

3. Take another look at the processing state of the rivet. If it is loose or the gap is too large, those exceeding 0.02mm are dangerous goods.

4. Press the pedal tube with your foot to see if it is firm. If it is loose and floating, it is dangerous goods.
5. Check whether the latch is loose, which is also related to life safety. If the latch is loose, it will move and fall down automatically during operation.