On Thu, 07 Aug 2008 01:45:40 +0100, a particular chimpanzee, John Rumm
 randomly hit the keyboard and
produced:

>Open riser, with cut (or open) string. Often used on decking and garden 
>steps - not so popular inside these days (would not pass building regs 
>without at least a bar in the centre of the riser position to stop your 
>foot slipping through)

The bar is or would be there to stop a child falling through or being
trapped. The requirement is that a 100mm diameter sphere cannot pass
through any gap. It only applies to buildings where children under
five could be present, so it applies to dwellings and public places,
but not offices, etc.
-- 
Hugo Nebula
  "If no-one on the internet wants a piece of this,
   just how far from the pack have you strayed?"

"Hugo Nebula" <abuse@localhost> wrote in message 
news:d15da49nqpcgmmqe6hktfnj9bnrbc8n9ia@4ax.com...
> On Thu, 07 Aug 2008 01:45:40 +0100, a particular chimpanzee, John Rumm
>  randomly hit the keyboard and
> produced:
>
>>Open riser, with cut (or open) string. Often used on decking and garden
>>steps - not so popular inside these days (would not pass building regs
>>without at least a bar in the centre of the riser position to stop your
>>foot slipping through)
>
> The bar is or would be there to stop a child falling through or being
> trapped. The requirement is that a 100mm diameter sphere cannot pass
> through any gap. It only applies to buildings where children under
> five could be present, so it applies to dwellings and public places,
> but not offices, etc.

Open days?