3431 NASSAU ST 2018-01-02 MF Import

Bearing Soil/roundation Preparation — Garage Area NE Corner 35'" St. and Nassau St., Everett, Wa. Cin- of Everett Project 4REV104-017 0a-0s-!0 Based on the observed conditions as outlined above the following recommendations for the garage foundation and floor slab have been made: A. Foundations for bearing walls (north and south garage walls) will be placed upon confirmed bearing soil prepared per the recommendations contained within this letter. B. Foundations for non -bearing walls (east and west garage walls) will be floated upon a four-(4) ft. wide by two-(2) ft. deep crushed rock mat. A strong, durable geogrid fabric will be placed below the crushed rock to provide separation and support for the crushed rock. Reinforcement steel within the footings will be doubled to help stiffen up the foundation to better handle potential increases in differential settlement resulting from placing the footings upon different amounts of fill material. The reinforcement steel along the north side of the foundations will be tied into the existing basement wall providing additional rigidity in these comers.. C. The garage floor slab will be made into a structural slab reinforced with #4 rebar tied into the north side foundation wall and the south side footing elements. D. Point loads for decks and overhangs placed within the backfill for the foundation area should be carried upon minimum sixteen-(16) inch diameter sonnet tubes that are a minimum 48 inches in length with adjustable jack connectors to allow for leveling if above normal settlements occur at these locations. Site Visits Foundation layout for the garage area was completed prior to our site visit on April 11, 2005. Access will be from a driveway into the west side of the garage (ie: garage door on the west side). The following observations were made at this time: 1) The north side of the garage is shared with the existing house foundation. 2) The south side of the garage will be a bearing wall and will be located within a cut area. 3) The cast and west foundation walls will not be bearing and will be located within backfill for the house foundation. 4) The amount of fill beneath the garage slab will vary from approximately three-(3) feet along the south side of the garage to over twelve-(12) feet next to the existing house foundation. Foundation excavation for the garage area was completed prior to our April 13, 2005 site visit. Exposed bearing soil along the southern wall consisted of undisturbed, wet, tan to brown. fine-grained, silty sand (sm-ml) which was consistent with those observed during the site investigations (see August 29, 2004 letter). Soil exposed along the east and west footing lines consisted of dark brown, fine-grained silty sand — foundation backfill. Due to the apparent moisture sensitivity of the exposed bearing soil along the south foundadon wall, we recommended that this area be overexcavated an additional two-(2) feet and that a rock mat similar to the ciae recommended below the east and west wall footings (item B above) be placed. 2 GES, Inc.