Unobstructed means just that.
Noncomb. members means no closley spaced, light, fast burning 'kindling'.
I would vote 225 sf max if my vote counted.
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of Travis Mack
Sent: Wednesday, May 06, 2015 12:40 PM
To: [email protected]
Subject: Re: Attic
That makes sense. I was grabbing for straws. Customer missed it because of
steel framing. Didn't catch plywood sheathing. I was hoping to be able to
help cut down sprinkler count.
Travis Mack, SET
MFP Design, LLC
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On May 6, 2015, at 10:25 AM, Eric V. Tysinger <[email protected]> wrote:
I would think that the spacing of the members is addressed as potential
obstructions. Less than 3' means there are more members between each
sprinkler, so the maximum spacing is reduced to lessen the number of
obstructions. I don't think the combustibility of the members plays a part.
The table only cares if it is non-combustible or combustible construction,
obstructed or unobstructed, and the spacing of the members.
Eric V. Tysinger
Designer
Wiginton Fire Systems - Miami, FL
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-----Original Message-----
From: Sprinklerforum
[mailto:[email protected]] On Behalf Of Travis
Mack
Sent: Wednesday, May 06, 2015 1:17 PM
To: [email protected]
Subject: Re: Attic
That was my question. Does the non combustible framing members modify
that, or allow for any changes? I am aware of using that for combustible
members.
Travis Mack, SET
MFP Design, LLC
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On May 6, 2015, at 10:06 AM, Eric V. Tysinger <[email protected]> wrote:
Wouldn't table 8.6.2.2.1(a) indicate 130sqft max?
Combustible, Unobstructed, with exposed members less than 3'-0 on center.
Eric V. Tysinger
Designer
Wiginton Fire Systems - Miami, FL
Email: [email protected]
Main: 305-888-2402p3416
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by reply e-mail and destroy all copies of the original message.
-----Original Message-----
From: Sprinklerforum
[mailto:[email protected]] On Behalf Of
Travis Mack
Sent: Wednesday, May 06, 2015 12:43 PM
To: [email protected]
Subject: Re: Attic
It is not fire treated. I already tried that route. I feel like 225 would
be acceptable. Which also begs the question, would ex cov be acceptable? It
is unobstructed construction. I believe the ex cov sprinklers are allowed
for unobstructed combustible.
Just a rare situation.
Travis Mack, SET
MFP Design, LLC
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On May 6, 2015, at 9:21 AM, Todd - Work <[email protected]> wrote:
Good question. I think you could go to 225, but the Book doesn't
address it. I assume the plywood is not fire treated? Most of the
times I see this arrangement, the plywood is treated.
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
www.fpdc.com
860-535-2080 (ofc)
860-608-4559 (cell)
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On Wed, May 6, 2015 at 12:04 PM,
[email protected]
<[email protected]> wrote:
For an attic with light gauge steel trusses spaced 24" on center and
plywood deck sheathing, would the spacing be limited to 130 sq ft or
would 225 be acceptable? Slope is 3:12.
Travis Mack, SET
MFP Design, LLC
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