HomeMy WebLinkAboutMiscellaneous Correspondence 2008-2-28
",,'
Page 1 of 1
CASTILE Robert
'lj
, .'\dO'5~,~\(\
'~.'~'YL~,__ '
From: PUENTDavid,
, Sent: Thursday, February 28, 2008 8:34 AM
To: CASTILE Robert
Subject: FW: Spam: sfs #16
Robert,
Good morning, Would you spend a couple of minutes and look into the two questions that Bentley is asking and
give rneyour findings? Thanks, dave' r
From: Paul Bentley [mailto:plbarch@rosenet.net]
Sent: Wednesday, February 27, 2008 11:34 AM
To: PUENT David
Cc: STINEMAN Carol; KNAPEL Carole
Subject: Spam: sfs #16 '
"
'Ii
Dave:
I am working with my structural engineer and the team trying to identify v,arious options for floor systems on the
fire station, In trying to baiance the costs, constructibility, etc, I also need.to meet the one hour fire separation
requirement., As you are aware both the code and the gypsum a5sociatio,n fire resistive manual identify many,
, systems that would work for such an application, Jt is our intent to select one of the approved, systems which shall
, be identified on our desgin development'drawings, , ' I' '
In reviewing these various systems, I noticed that in the gypsum manual it notes that the use of fiberglass
insulation sometimes' adds a third layer of gypsum board to achieve the ~equried one hour rating, for exampie look
at FC 5110, However, upon further review no mention is made at at FC 5513, The difference appears to be the
use of I joist instead of wood framing, My question is, in your opinion does the use of insulation impact the fire
resistance since the FC 5513 does not speak,to it? We would like to Increase the STC sound rating between first
"floor apparatus area and second floor living area to the maximum,which:could be done by adding insulation,
Also, it appears to me this issue only impacts if using fiberglass insulation, so can I infer that it does not.have an
impact with mi~eral fiber insulation? '
'Another question:1 would like to pose, is the systems that look to have the most potential for us'are the FC 5111
, and FC 5513 which describe wood I joist. Does the use of a wood I joist with a steel open web member that
cO[11plies with the web requirements noted under each system still work in your opinon? Neither of these systems
, specifiy that the web member material is wood or metal so personally I see this as a 'non issue, but I'need your
opinion on it.
Sorry to bother you with'these issues but it is better thatwe resolve them now, as opposed to iater. 'Thanks
again for your help,
Paul
2/28/2008