3707 22ND ST 2016-09-14 - Laserfiche WebLink

GK STRLJCTuRAL ENG/NEER/NG' LLC STRUCTURAL EFFEc77vE EmclENT.SaLuT7aNs REVIEW LETTER Greater Seattle Construction,LLC March 3,2015 Attn: Matt Durant,Project Manager GK Project#: YR7-15-005 10201 Main St,Ste 101 Bothell, WA 98011 Re: Bergesen Residence-Fire Damage Repair Recommendations 370722 nd St Everett,WA 98201 Dear Mr. Durant: GK Structural Engineering,LLC(`GKSE')completed a site visit on 2/13/15 to review the fire damage to the above referenced single family residence. The fire damage appears to be limited to the chimney area on the west side of the existing 2-story residence. We also were present with Ted Budden of the City of Everett building department on 2/18/15 for their fire damage walk-through inspection. The following are our recommendations and/or requirements for repairs based on our site observations as well as our on-site discussion with Mr. Budden during their inspection walk-through. Structural Framing: 1. Based on our observations of the limited areas that were exposed for observation at the time of our site visits,structural framing repairs are generally limited to several 2x4 roof rafters that were either charred from the fire or saw-cut by the fire department during firefighting operations. See attached structural repair sketch SK-1 for a section cut through the exterior wall showing required structural(and non-structural)repairs for the roof framing. 2. The existing wood-framed chimney will need to be removed and reframed due to fire damage and also to meet current code requirements for clearances between the flue and the combustible framing. The new wood-framed chimney should be framed with new 2x4 @ 16"oc maximum framing with upsized dimensions which meets the clearance requirements for chimneys as per IRC Chapter 18"Chimneys and Vents"and per the new wood stove manufacturer's instructions. The new chimney wall returns should be nailed to the existing exterior wall of the house with minimum 16d @ 6"o/c nails,full height of the chimney. Non-Structural/Code Items: 3. The existing wood stove on the main floor does not meet code and will need to be removed and replaced per our discussion with Mr. Budden. The new stove will need to meet the clearance requirements to the combustible walls of the fireplace as well as adequate hearth width. A new fireplace hearth may need to be installed to meet code and stove manufacturer's requirements. 4. Per our discussion with Mr.Budden,the contractor will need to verify and/or provide smoke and CO detectors at all locations required by the IRC for single family residences. The smoke and CO detectors need not be hard-wired as part of this repair project unless it is feasible 60S STATE ST S, STE 7 00-0 PAGE l OF 2 P:425.235.9 7.3 7 KIRKLAND, WA 93033 F:425.250.2384 1 /