1101 GRANDVIEW AVE 2025-08-07 - Laserfiche WebLink

, ; PROJECT NO. SHEET NO. .i..\ � S221116-1XR i i � PROJECT 1101 Grand View Dr, Everett, WA 98203 LONGITUDE SUBJECT Foundation Stabilization/Jacking ONE TWENTY° ENGINEERING&DESIGN BY KJ DATE 12-9-22 ScopeeObjective: To determine the required pile spacing and geometry to stabilize and lift(where required)the existing structural foundation. These findings have been based upon the calculated strength of the existing 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 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. Below the footings, piles are to be spaced at a distance no larger than 6'-0"on-center at the locations indicated on the attached Level Survey. In addition, the existing residence will undergo a remodel. New piles locations will be required under new point load locations per Structural Remodel Plans provided by BTL Engineering(EOR). Reference the attached Level Survey for coordination of pile locations. Refererence SSK-01 & SSK-02. -End piles are to be placed as close to corners as possible and shall not exceed a max corner offset distance of 3'-0". -A maximum allowable loading of 2,130 plf was utilized in this analysis.This was determined through inspection of building geometry and conservative span/tributa loadin. assumptions based on standard construction •ractices The following load values represent the maximum expected pile loads for the indicated spacing. R&R to provide pile and equipment >assemblies with capacities equal to or greater than the indicated load values. Allowable Load Capacity Requirement: Exterior/Perimeter Piles @ 6'-0"o.c. (Pile#12, 17-20) 11 kip minimum vertical capacity(allowable load) Exterior/Perimeter Piles @ 6'-0"o.c. (Pile#1-2,4) 13 kip minimum vertical capacity(allowable load) Exterior/Perimeter Piles @ 6'-0"o.c. (Pile#3, 5-7, 10-11, 13, 21) 9 kip minimum vertical capacity(allowable load) Interior Piles @ 6'-0"o.c. (Pile#8, 27) ......... 15 kip minimum vertical capacity(allowable load) Interior Piles @ 6'-0"o.c. (Pile#14, 22) 7 kip minimum vertical capacity(allowable load) Interior Piles @ 6'-0"o.c. (Pile#9,28, 30)...... 17 kip minimum vertical capacity(allowable load) Interior Piles @ 6'-0"o.c. (Pile#15-16, 24-25, 29) 14 kip minimum vertical capacity(allowable load) Interior Piles @ 6'-0"o.c. (Pile#26) 10 kip minimum vertical capacity(allowable load) . Interior/Exterior Piles @ 6'-0"and 8'-0"o.c. (Pile#1PC-13PC) 20 kip minimum vertical capacity(allowable load) Note: Refer to the attached General Notes for additional requirements. Y 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 -xpected additional structural analysis will be required. - t c ra ec•m en.a I•ns co ai e• in is •ac ag- are base. on site p otograp s •a ed 8/ - 28 2, .y 'V. o t e knowe•ge o 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 L120 ENGINEERING&DESIGN Refer to the following pages for pile and connection specifications.