Forgive me if this has been addressed before, but I cannot find any specific guidance on it. In addressing sprinkler temperatures, in the 2013 version of 13 I am a bit confused about the way attics are addressed. 8.3.2.5 (5) states "Sprinklers in an unventilated, concealed space, under an uninsulated roof, or in an unventilated attic shall be intermediate-temp...". Per this wording, it seems there is a differentiation between a ventilated attic and an unventilated one. However, in table 8.3.2.5 (b) the chart appears to indicate Intermediate Temp heads are required in Attics regardless of ventilation.
Also, what is the difference between an Attic and a concealed space in a peaked roof building. Table 8.3.2.5 (b) makes a distinction between them. I have looked in the definitions both in 13 and in the IBC and cannot find a way to clearly determine what the difference would be. The IBC defines an Attic as "the space between the ceiling beams of the top story and the roof rafters". What would make this area an attic as opposed to a concealed space below a peaked roof as addressed by Table 8.3.2.5 (b)? My question is not about best practices as I realize the prudent decision would be to use intermediate-temp heads in any unconditioned space between a roof and ceiling regardless of what you call it. My question is specifically what is acceptable per the standard. Micah Davis, SET NICET #124745 Water Based Systems Layout, Level IV Dynamic Fire Designs Mail: [email protected] Mobile: 931-242-1299 www.dynamicfiredesigns.com<http://dynamicfiredesigns.com/> Dynamic Fire Designs • 247 Winthrop Dr. • Spring Hill • FL • 34609 This message is confidential. It may also be privileged or otherwise protected by work product immunity or other legal rules. If you have received it by mistake, please let us know by e-mail reply and delete it from your system; you may not copy this message or disclose its contents to anyone. The integrity and security of this message cannot be guaranteed on the Internet.
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