One of the easiest ways to have an accident is to fall from a ladder. Often, this happens because the base is insecure.
Another serious danger is ascending past the point where at least one hand can grip the side rails. It’s always tempting to balance on the top rung and stretch to paint that last, high section of wall.
Today’s invention is a simple alternative design which overcomes this danger. The ladder has a section of rungs deliberately missing at the top end. You can stand on rung B and grip the rails at A but no greater height is possible.
If you need a taller ladder, then a sliding extension can be added in the usual way -to the bottom end.
Another advantage is that, at the end of the day, this design can be inverted and locked to eg a downpipe, making it impossible for burglars or children to ascend.
From a marketing point of view, this would be better portrayed as providing extra length rather than less. The de-runged bit could be painted a different colour.