tier 4 datacenter requirement "translation"

Fri Sep 14 19:53:29 UTC 2018

Datacenter owner/operator and retired engineering contractor here. 

They are not talking about “mechanical” systems such as HVAC, they are instead describing a “Mechanically attached roofing system”.  That’s a specific term, and covers metal roofs of a specific type and construction.   

See: https://msrs.com/new-construction/fully-adhered-vs-mechanically-attached/

Concrete is a superior substitute.  Concrete deck your datacenter and you’re done.   It’s considered pretty bulletproof.  Figuratively and literally.

Our DCs have concrete floors walls and ceilings. 

-Ben

> On Sep 14, 2018, at 8:34 AM, Andrew Latham <lathama at gmail.com> wrote:
> 
> 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 <valeriu at 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 -
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20180914/5849c2f6/attachment.html>