HomeMy WebLinkAboutENCLAVE AT REDWOOD - PDP210004 - SUBMITTAL DOCUMENTS - ROUND 4 - FIRE AUTHORITY REQUIREMENTS
3518 E. Everett Avenue | Spokane, WA 99217
P: 509.489.5040 | F: 509.489.5044 | W: www.advfiresystems.net
December 21, 2021
Dear Aaron,
I have reviewed the preliminary set of drawings for the Enclave at Redwood project as requested
to determine appropriate fire line sizes to each building. Several assumptions were made in
determining a preliminary fire line size. First, during our phone conversation, I was told that a
static pressure of approximately 105 PSI was available in the area. Second, (and the most
important) is the assumption that the 4-plex, 6-plex, and 8-plex buildings will all be covered
under the NFPA 13R code section. NFPA 13R will allow exclusion of sprinkler protection from
combustible attic spaces and combustible concealed construction.
Based on these assumptions, and review of the preliminary drawings, a minimum of a 2”
internal diameter fire line is appropriate to supply the required 60 GPM necessary for the fire
suppression system.
This determination is based on preliminary drawings, and limited information. A full hydraulic
calculation will need to be performed to determine the fire line sizing with certainty.
Thank you,
Richard Skelton
Advanced Fire Systems, Inc. | Vice President