We disagree with your view on grating & hand rail consideration due to following requirements.

@level 3600 : Interconnectivity between new and existing equipment on all levels (floors) is proposed in our earlier layout drawing. This is vital for easy movement of operating personnel. Additionally this is a safety requirement for immediate evacuation in the event of emergency. In fact we have curtailed on second stair case considering this inter connectivity. Secondly we should have symmetry in the measurements as the new and existing systems are located next to each other. Hence the extension of width suggested.
@level 6800 : Flash vessels (3 No's) and also the inlet steam valve of ATFD are located at this level. Fine tuning of flash vessels do exist in line with fluctuations in steam pressure. ATFD steam valve operation is also involved. This is a regular activity at this level. Therefore grating and hand rail as suggested by us is required for access of operators.
@level 10000 :  Interconnectivity between new and existing equipment on all levels (floors) is proposed in our earlier layout drawing. Extension in the width shown to ensure symmetry. 
