I would have to go check for sure but I believe it applies to screws or bolts that could pierce the membrane. A well sealed roof is all they are looking for.
On Fri, Sep 14, 2018 at 10:03 AM Valeriu Vraciu <vale...@roedu.net> wrote: > Hello, > > > It may be somehow offtopic, but maybe someone can help understand the > meaning of a requirement for Tier 4 DC. > > We have a project to build a Tier 4 datacenter. One of the requirements > specified in TIA942 and related to roof of the building sounds like this: > > "double redundant with concrete deck (no mechanically attached systems)" > > For my understanding (being not a native English speaker) what exactly > does this mean ? > 1. no mechanically attached to the roof systems (gear, equipment) like > air-conditioning, generators etc. > > or > > 2. the roof (double) is made from components that are not mechanically > attached with bolts and such. > > > Thanks in advance. > > > -- > Valeriu Vraciu > RoEduNet > > -- - Andrew "lathama" Latham -
