2612 E GRAND AVE 2021-11-12 - Laserfiche WebLink

sor1u • P._ JJECT NO. SHEET NO. S200803-2 PROJECT 2612 E Grand Ave, Everett, WA LONGITUDE SUBJECT Foundation Stabilization/Jacking ONE TWENTY° ENGINEERING&DESIGN BY KJ DATE 11/25/20 Scope/Objective: To provide the siz-ing-and-specifcati st mwati oundation-and-porch-that is to be p all of the residence. These findings have been based upon the calculated strength of the proposed foundation system and the current vertical loading from the existing structure above(based on as-built assessments). The R&R Foundation Specialists'(R&R)proposed pile layout/foundation proposal can be found in the following pages with structural recommendations based upon the findings of L120 Engineering&Design. Note that cosmetic damages to rigid wall coverings/members and siding are expected during a foundation lift. Such cosmetic damages/cracks are to be repaired by others following the completion of the foundation stabilization and lifting and are not included in the structural scope presented here. It should be further noted that L120's scope is limited to the perimeter support systems/continuous footings.The interior crawl-space support system for the first floor shall be installed per R&R. This could include the use of some or all of the following: longer support posts,adjustable post-base hardware, and/or the addition of taller wood support members. Settlement in these interior support areas shall be monitored and further adjustments shall be made if necessary. Structural Summary: -The foundation of the residence consists of continuous cast-in-place concrete stem wall and concrete strip footings and a cmu wall footing along the rear wall.The existing cmu wall footing is to be removed at the rear wall of the residence and a new 8"wide stemwall and 1'-4"wide footing are to be poured below the existing wood framed wall at the rear of the residence as well as the exterior of the proposed porch.The stemwall and footing are to be tied into the existing walls per detail SSK-02.The existing soil is to be excavated, backfilled with structural fill and compacted to 90%as required per soil conditions. Reference details SSK-01 and SSK-02 for new concrete stemwall and existing stemwall interaction. -A maximum allowable loading of 1,200 plf was utilized in this analysis.This was determined through inspection of building geometry and conservative span/tributary loading assumptions based on standard construction practices Note: Refer to the attached General Notes for additional requirements. - As determined by R&R,the site appears to have no lateral(horizontal)displacements or concerns. As such,the analysis and recommendations presented in this report have been strictly limited to vertical stabilization/jacking. If lateral movement is observed or expected additional structural analysis will be required. - Structural recommendations contained in this package are based on site photographs dated July 27,2020, provided by R&R.To the knowledge of L120, a geotechnical investigation was not performed on this site. Consequently,all structural recommendations assume adequate soil conditions to obtain the required pile capacities. Please inform L120 of site-specific conditions that were unconsidered by, may conflict with, or otherwise compromise the recommendations contained within this package, including, but not limited to,water drainage,slope stability,existing structural damage, or existing subsurface obstructions. In this instance,the structural assumptions,recommendations,and scope for this project will need to be revisited to consider and address the new findings Refer to the following pages for pile and connection specifications. \C\ L120 ENGINEERING&DESIGN