... and down, there are two type of Springboard (type A and type B),Type A is integral springboard, Type B is removable(Facilitate collection). In ... test,Supported at both ends of the ladder,Two stepping load 75Kg of pressure,After unloading,No permanent deformation.l Standard ... of 600mm, Can widen or decrease according to the customer's requirements. Type A8 means: length 8m , wid 0.6m Integral aluminum ...