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HomeMy WebLinkAboutPermit File BLD-2018-0280 1604 Latitude Circle (7) ( D 2316 Antone Way Tim K0 rf is©11D Poi o Anacortes,WA 98221 Phone: (360) 708-1865 Consulting Engrneer Time@TimKGarrison.com Structural Analyst IRetai n ng Walls at Varcions Locations in Skagit County, WA Client: Landed Gentry Homes and Communities CC/Job Number: T17037 Building Design: Landed Gentry Date: January 25, 2018 .% 160 1(, ),._ -''' \I(41) aikiN i', rel % t4Ax t ‘2,mt ...,,, 41, ,, --of 1 TE ,AVAik V' Or ii°24,9 '45.SAL . wow army'd 0,-N INDEX: Design Sketches SKl —SK2 Callouts and Tables CO1 Standard Specifications B—D Total No. of pages excluding cover sheet: 6 Notes,Disclaimers: ConstructionCalc,Inc. (CCI)takes responsibility only for items specifically addressed within this report set. This report is valid only for the specific project shown above and herein.Further,this report is valid only if it is stapled or otherwise bound as it originally left this office,and contains all of the sheets as originally bound. Any sheets that are not bound to the original complete set are not valid and shall not be used (excluding authorized, stamped addendums). 21_,ticH / 60 9 Lq--11 e ( ir L. 20 ° • ikatriga.. I. • t , ', - I ' . • • I , . . . ., , . • , .. . . , . . , . • � � . ICfltOkretter.T. • • • a .. • . . . . _ _ .. . • • . •.. ... .1 1.441 al citille CPI. 51Z01.11 • • r I. I c • t . iikles I ; 1 0 12,_ Sauer • . ' calis 5 ‘ a • ; • • ; OS* ...... .. . .I,. .•..•.' .•I.••. . .. . . . ...•. ii..0.I.,I j.. 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I • I a I t1, I •,'_ 1~ , I • • 1 I • 1 • • . t • ' t •• ; t I • 5 t i t i S I II ' 17 4lKilkc III i _ f . WALL. (Krr 5) Ii �J 3 J �, li, ,i o IsT 4 �- Sc.7w5 ot. RA 0.44,LLEL F L.00✓., Ii J LtJA1 c-.S `/ bld4CIrA d rrOG4 S. _. 1 ----- - '.. .. ‘ li .,If Pr' .7, M L2,6 L.,/ - ; '' ti, j a o (r 50 ..)"---;:' . . .. .11:70%,"4:10 I FeLp vpiCUL.111 F / 32 1� - f 60 ��� �i �� 1�1A r' r1 - J\Av_ LoAb 1 -65. . coA.A.,E.c,TE, To utiok-L. . 41.11 j 'i h Satz % 4 t' ' w a.1 < X - - I`i( 2�4 b )14 Zva `' Z P54 wi1lx Sew - :l 0(2- 1AJAS 14E-b [t ,.?-4kA.t.- op.-71vvi . DI g2-k6-T FLoorL 1 ;1. rKAD i, -,; i gh t i t LA? SR. 16E, I 5c B. S ) 174 '' ,&,--..„ °,47,,,,=---,,,,---4,1=7,--- - . 'I''' ________ _____:± 1 V ''VC‘ (0) I�ci► 4.:-_--- t 0 i�� 1��� _To' ts`t. rem rL A� 0 Can abever Retalrbg Wall (with slab at base to resist sliding. No floor diaphragm connection at top of wall.) A B C D E W X Y Z Retained Wall Footing Footing Wall Vertical Horiz. Footing Footing Ht. Position Width Height Thkness Rebar I Rebar Transv. Cont. 0' 4 5" 18" 9" 8" #4@18" #4@12" #4©18" 2, #4 4.1' - 6' 7" 30" 9" 8" #4@16" #4@12" #4@16" 3, #4 6.1' - 8' 10" 40" 10" _ 8" #5@18" #5@18" #5@18" 4, #5 8.1' - 10' 10" 52" 12" _ 8" #5@9" #5@12" #5@9" 5, #5 10.1' - 12' 12" 64" 12" 10" #6@10" #5@12" #6@10" 6, #5 Notes: * Columns C, D, E, F, M, N, P, W, X, Y, Z are minimums. May use greater. * Max gravity load on wall is two stick-framed floors plus roof. * No significant surcharge loading. Retained soil is level or uphill sloping no greater than 5-degrees. * Concrete f'c = 2,500 psi. * Rebar fy = 60 ksi, grade 60 * Min soil bearing = 2,000 psf. * Floor diaphragm must be connected before retained soil is placed against wall. * If "W" bars are spliced, min lap splice = 30". * Behind wall drainage is MiraDrain 2000, washed drain rock, or similar with 3" perf pipe to daylight. !La-aced Retaining Wall (top of wall IS connected to floor diaphragm) A B C D E F G W X Y Z I�_ Retained Wall Footing Footing Wall MASA Block Vertical Horiz. Footing Footing Ht. Position Width Height Thickness Spacing Spacing Rebar Rebar Transv. Cont. 0' - 4' 10" 28" ` 9" 6" 72" _ Not Reqd 114 @ 24" #4 @ 24" #1 @ 24" 3,#4 4.1' - 6' 12" 34" 9" 6" 72" 72" #4 @ 18" #4 @ 18" #4 @ 18" 3,#4 6.1 - 8 12" 42" _ 10" 8" 42" 46" , #4 @ 18" #4 @ 18" #1 @ 18" 4, #4 8.1' - 10.2' 12" 50" _ 12" 8" 24" _ 24" #5 @ 14" #5 @ 12" #5 @ 14" 5, #5 10.3' - 12' 12" 60" 12" 8" 18" 18" #5 @ 9" #5 @ 12" 1 #5 @ 9" 6, #5 J - Notes: * Columns C, D, E, W, X, Y, Z are minimums. May use greater. * Columns F, G are maximums. May use less. * Max gravity load on wall is two stick-framed floors plus roof. * No significant surcharge loading. Retained soil is level or uphill sloping no greater than 5-degrees. * Concrete fc = 2,500 psi. * Rebar fy= 60 ksi, grade 60 * Min soil bearing= 2,000 psf. * Floor diaphragm must be connected before retained soil is placed against wall. * If"W" bars are spliced, min lap splice=24". i * Behind wall drainage is MiraDrain 2000, washed drain rock, or similar with 3" perf pipe to daylight. = g I Stranmisrrd Structural Specifications© — Copyright, Tim K. Garrison, P.E. BASIS OF DESIGN—APPLICABLE CODES: Code.The designs herein are prepared in accordance with the 2015 IBC. Construction shall conform with the most recent building code adopted by the approving jurisdiction. Calculations.There are no calculations submitted with this report.If calculations are desired they may be obtained from the consultant for additional fee. LIMITED SCOPE OF CONSULTANT'S WORK: Consultant.The consultant in responsible charge of the work indicated herein is Tim K.Garrison,P.E., doing business as ConstructionCalc,Inc.,hereafter indicated as``CCI." Scope of Consultant's Work.The scope of work of CCI is limited to structural analysis of new reinforced concrete retaining walls of varying heights. CCI takes responsibility only for items specifically addressed in our drawings and calculations.Constructed items not specifically addressed herein shall be built per minimum code. CCI has not analyzed any other portion of any building,including but not limited to:foundations,beams, columns,walls,floors,floor framing systems,roof framing system, connections,etc. LOADS Following are the loads used for the subject design/analysis: O Roof live: 20 psf. 0 Floor dead: 15 psf O Roof+ceiling dead: 15 psf 0 Exterior wall dead: 10 psf O Roof snow: 25 psf 0 Assumed allowable soil bearing pressure: O Floor live:40 psf 2,000 psf. SELECT APPLICABLE PROJECTS: The calculations,drawings,notes,specifications, and/or tables prepared by CCI are valid only for Landed Gentry designed and built homes in Skagit County where snow load is 25 psf or less.These documents are not valid,are not applicable to,and shall not be used for any other project at any other location. COMPETENT CONSTRUCTION PERSONNEL/SAFETY: Only competent personnel familiar with construction and safety practices germane to the project shown herein should be employed to assemble and construct the work. Contractor shall be responsible to comply with all OSHA and State Labor and Industries Standards. Contractor assumes full responsibility as to construction methods used, safety provisions employed,and the finished as-built condition of the structure and related systems. MATERIALS AND METHODS: Provide and install all materials in accordance with manufacturer's requirements and recommendations. It is the contractor's responsibility to ensure all field personnel understand and adhere to this. TEMPORARY SUPPORT AND BRACING: General.Provide adequate temporary support to all walls,roofs,beams,columns,and floors during construction.Design of same is not included herein. Contractor or owner should check all temporary- G supporting devices with a qualified person.Contractor shall be responsible for the adequacy of all temporary and/or permanent support systems. Retaining Walls.Do not backfill against retaining walls until concrete has cured to at least 2,500 psi(okay to use high early strength admixtures or additional cement in the mix to achieve this).For retaining walls that are to be connected at their top to horizontal floor diaphragms,do not backfill against the retaining wall until such horizontal diaphragms are in place and properly connected to the retaining wall. FOOTINGS,FOUNDATIONS,SLABS ON GRADE: Geotechnical Report: CCI is not aware of a geotechnical report for this project.CCI strongly recommends that a geotechnical report be performed by a qualified geotechnical engineer for all construction projects. Soils analysis and geotechnical engineering are not a specialty of CCI. CCI depends on others for the provision of soils data, which includes but is not limited to: allowable bearing capacity,liquefaction potential,slope stability,active and passive lateral pressures,internal friction angle,and cohesion. In the absence of a geotechnical report CCI will make assumptions regarding soil parameters,however,CCI takes no responsibility or liability for future settlement, or damage or injury due to earth movement or failure of any kind. Structural Fill: "Structural Fill"shall be granular material conforming to local or state highway specifications for imported road base or sub base; or use sand or other clean granular materials no larger than pea gravel.All structural fill must be compacted per the following section. Non-Structural Fill: "Non-Structural Fill"is soil(native or imported)without: organic materials;rocks and lumps greater than 3"in any dimension;trash;and the like.If used as compacted fill, it must be compacted per the following section. Compaction: Place all fill materials in lifts not exceeding 8-inches.Compact using mechanical(vibratory or impact)methods. In paved areas and under structures,use structural backfill compacted to 95%relative compaction. When roots,rocks,or other undesirable materials cause over-excavation,fill over-excavation and compact per the above. Foundations,Footings on Soil:All footings and foundations to bear on undisturbed existing soil or structural fill.All organic and deleterious material beneath footings and foundations to be removed and replaced with structural fill.Bottom of footings to be below locally prescribed frost zone,not less than 12". Footing Drains.Footing drains,with washed drain rock or Mira Drain or equivalent extending to finished grade, shall be provided at the base of all footings and retaining walls which will have earth placed against them.Footing drains shall be 4"perforated pipe routed downgradient to daylight,unless otherwise specified. STANDARD CONCRETE: Standard Concrete. Concrete for footings, slabs, and walls shall attain a minimum 28 day strength of fc= 2,500 psi unless otherwise noted on Plans.Minimum cement content=5 sacks per cubic yard.Maximum water/cement ratio shall be 0.45.All materials shall be in accordance with ACI 318,latest edition.Mixing and placing of all concrete to be in accordance with IBC and ACI 304, latest edition. Admixtures. Industry recognized and approved admixtures affecting set time, flowability, and/or waterproofing may be used provided the strength and durability of the concrete is not adversely affected. Air Entrainment.Provide 5%air entraining in all concrete exposed to the earth or weather. 15 Fly Ash.High quality fly ash or other natural pozzolan may be used in accordance with ASTM C618 with a corresponding reduction in cement content.Any such concrete shall obtain at least the strength and durability characteristics as Standard Concrete listed above. CONCRETE REINFORCING: Strength: Retaining Walls and other Structural Elements. Reinforcing bars(rebar)for retaining walls retraining more than 4-feet of soil and their footings, and for structural beams, structural columns and the like shall be grade 60(Fy=60 ksi)unless otherwise specified in the Plans. Splicing,Bending.All reinforcing shall be spliced,detailed,bent,and supported in accordance with the most recent ACI code adopted by the jurisdiction.