How to choose a ladder to the maximum safe?

How to choose a ladder to the maximum safe?

High -quality ladder must stand out with soundly attached elements and strength. Safety and convenience provide the following elements: corrugated steps, they do not allow sliding, dielectric rugs made of rubber, overlays made of plastic, they close the cuts of metal and sharp edges, the shoes anti -excelled on the racks will protect coatings for the floor will not allow sliding.