The HS folding stair is helpful for operators to conduct the loading work from the platform to the top of tank truck. 
                      Technical parameters 
                  
                      
                        No.  | 
                        Number of steps  | 
                        Length B (m)  | 
                        Width of channel (m)  | 
                        Weight (kg)  | 
                       
                      
                        HS-1  | 
                        1  | 
                        600-1500  | 
                        600  | 
                        80-125  | 
                       
                      
                        HS-2  | 
                        2  | 
                        900  | 
                        600  | 
                        130  | 
                       
                      
                        HS-3  | 
                        3  | 
                        1300  | 
                        600  | 
                        145  | 
                       
                      
                        HS-4  | 
                        4  | 
                        1700  | 
                        600  | 
                        160  | 
                       
                      
                        HS-5  | 
                        5  | 
                        2100  | 
                        600  | 
                        180  | 
                       
                     
                     Main features: 
                  
                      - It is equipped a neutral equilibrium device, enabling it to hover at any angle;
 
                    - It is allowed to select folding stairs of appropriate length to satisfy different types of trucks;
 
                    - The movable steps are still horizontal no matter where they are;
 
                    - The parts where steps contact with the tank truck is equipped with anti-collision and cushion pads;
 
                    - With a compact structure, it occupies little space when it is recovered;
 
                    - With a large bearing capacity, it can bear the maximum bearing capacity up to 200kg;
 
                    - It has foot treadles, and the treadle surface adopts the toothed and grid structure.
 
                    - The auto-lock of reset ensures safety during use.
 
                   
                    
                    Schematic diagram of action 
                    
				  Ordering requirements: 
Please provide the following two parameters 
Height of platform 
Distance from the edge of platform to the center of tank truck
  				 
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