1804 HEWITT AVE 2022-05-12 - Laserfiche WebLink

N.L.Olson&Associates,Inc. Engineering, Planning and Land Surveying. October 17,2017 New Hewitt/Hodges Associates, LLC c/o Doug Engelson 2418-C California Street Everett, WA 98201 RE: Fire Escape Evaluation at 1804 Hewitt Ave, Everett Mr. Engleson, NL Olson and Associates was retained to prepare a structural evaluation of the fire escape on the building at 1804 Hewitt Avenue in Everett. I made a site visit to the building to inspect the escape and the analysis/recommendations herein are based on a detailed visual inspection and subsequent structural analysis, The analysis is limited to structural analysis only to the extent of the inspection methodology. The building is a 5 story structure and the fire escape in question is located on the south end of the east wall. The exit doorways are on the east wall. Only(4) floors are accessible via this escape. The lowest floor(main)can exit to the sidewalk. As you approach the escape'dram the south,the lowest level(2"d floor)of the escape is constructed of 2x 12 wood joists and 6x8 beams and posts. The stair to the 3`d floor is a steel stair that leads to an 8 foot long steel landing constructed of steel bar grating and steel angles. The steel angles are attached to the brick facade with(2)anchor bolts on(2) sides and supported by a 2"wide steel bar knee brace. The knee brace is attached to the exterior wall with what appears to be a cast-in-place angle. Between each level of landings, there is a steel stair constructed of steel grate treads and steel channel stringers. The stair stringers are"hooked" over the bar grating at the top and bolted to the bar grating at the base. My analysis of the steel landings indicates that the bar grating. angles and knee braces are adequate to support a 100 psf live load. The only piece I am unsure of is the connection of the knee braces to the brick. Specifically, at the top of the knee braces. The red clay brick is not very strong in tension. The top of the knee braces have a tension component at the attachment. I believe that the exterior wall is concrete with a brick facade. I also believe that the anchors for the escape platforms go into the concrete wall and not just the brick.,If the anchors go into the concrete, they would only require a"J"bolt with 3 'Y2" embedment. 2453 BETHEL AVENUE, P.O. BOX 637, PORT ORCHARD, WASHINGTON 98366 (360) 876-2284 FAX (360) 876-1487