Hi Richard,
That is a multi-part question which needs to be answered in multiple parts.
RICHARD TAN wrote:Is this a diving and safety issue?
Yes, first and foremost it is a diving and safety issue.
Is stair, ... required to have visible marking?
I do not find a requirement in the code or in the referenced ANSI/NSPI 5 where entry stairs are required to have visible markings along the edges of the treads at the risers.
Is ... bench and offset required to have visible marking?
Not quite sure what you are meaning when you say "offset", however underwater seats, benches and swimouts are permitted in the deep end of a pool
if they are visually set apart from the surrounding pool, see reference to this in the code in my previous post - ANSI/NSPI 5, 6.7.2 in that code previously quoted and here:
- - 6.7.2 Underwater seats, benches and swimouts shall be permitted in the deep area of a pool if they are visually set apart and located outside the require Minimum Diving Water Envelope if the pool is designed for used with manufactured diving equipment.
I have seen many pool have marking and many have not.
Many older pool codes used around the state did contain such a requirement, this is an example (and there are many such examples) where codes have been weakened due to going to the Florida Building Code based on the ICC code series of codes.
Codeman