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Home My WebLink AboutBLD0113 Addition and Soil Investigation - BLD Application - 5/16/1989 i BUILDING PERMIT APPLICATION MASON COUNTY DEPARTMENT of GENERAL SERVICES P.O. BOX 186 SHELTON, WASHINGTON 98584gO L 427-9670 1..r'Iv I"o� DATE ISSUED " PERMIT NO. OWNER NAME MAILADDRESS ":j:'_Si(j} $T?� E ..- y ZIP PHONE North Mason School District P.O. Box 167 Belfair, WA 98528 DIRECTIONS TO JOB SITE School PARCEL LEGAL NUMBER 12332-40-60000 IDESCR. See Attached 9"? NAME MAIL ADDRESS CITY 8 STATE LICENSE NO. ZIP PHONE CONTRACTOR Hoffcon Construction 723 So. "K" Street, A, Tacoma, WA 98405 USE OF BUILDING Elementary School - existin CLASS OF NEW ADDITION X ALTERATION X REPAIR MOVE REMOVE WORK r DESCRIBE WORK 12 , 639 ft2 addition to present elementary school and remodel existin rooms . BEDROOMS DECKS CARPORT NOTICE SEPARATE PERMITS ARE REQUIRED FOR PLUMBING, HEATING, VENTILATING OR AIR BATHROOMS TOTAL SQ.FT. GARAGE CONDITIONING. NO.OF STORIES _ BASEMENT ATTACHED THIS PERMIT BECOMES NULL AND VOID IF WORK OR CONSTRUCTION AUTHORIZED IS NOT COMMENCED WITHIN 180 JAYS, OR IF CONSTRUCTION OR WORK IS SUSPENDED OR TOTAL SQ.FT. FIREPLACE DETACHED ABANDONED FORA PERIOD OF 180 DAYS AT ANYTIME AFTER WORK IS COMMENCED. PERMANENT SHORELINE SEASONAL OWNER AFFIDAVIT CONTRACTORS AFFIDAVIT I CERTI THAT I AM EXEMPT FROM THE REQUIREMENTS OF THE CONTRACTORS I CERTIFY THAT I AM A CURRENTLY REGISTERED CONTRACTOR IN THE STATE OF REGIST TION LAW RCW 18.27, AND AM AWARE OF THE MASON COUNTY ORDINANCE WASHINGTON AND I AM AWARE OF THE ORDINANCE REQUIREMENTS REGULATING THE REQUI MENTS FOR WHICH THIS PERMIT IS ISSUED AND THAT ALL WORK DONE WILL BE WORK FOR WHICH THE PERMIT IS ISSUED AND ALL WORK DONE WILL BE IN IN C FORMANCE THEREWITH. NO CHANGES SHALL BE MADE WITHOUT- FIRST CONFORMANCE THEREWITH.NO CHANGES SHALL BE MADE WITHOUT FIRST OBTAINING OBTA ING APPROVAL FROM THE BUILDING DEPARTMENT. APPROVAL FROM THE BUILDING DEPARTMENT. X O NER DATE 5 14X BY DATE F R OFFICE USE ONLY DEPARTMENT APPROVED DEPARTMENT APPROVED BUILDING VALUATION Cr YES NO YES NO HEALTH i, PUBLIC WORKS FEE PLANNING 31� FIRE BUILDING PERMIT - D.O.T. BUILDING PLAN CHECK SPECIAL CONDITIONS BUILDING GROUP PRE-INSPECTION Qj C n� �-t ��•�_L" SHORELINE I � WOODSTOVE PLUMBING MECHANICAL STATE BUILDING FEE STATESURCHARGE J APPLICATION ACCEPTED BY I PLANS CHECK BY APPROVED FOR ISSUANCE PERMIT VALIDATION BY CASH CK MO TOTAL 177SEP N SCHOOL D(STRI'l { Q ► �� SOILS INVESTIGATION ADDITION TO BELFAIR ELEMENTARY SCHOOL M BELFAIR R for NORTH MASON SCHOOL DISTRICT 403 BELFAIR i I _ W.O. 8843 SEPTEMBER 1988 Grover C. Way, P.E. Grover C. Way, P.E. TACOMA.WASHINGTON 98402 CONSULTING SOILS ENGINEER Area Code(206)272-8363 September 16 , 1988 i North Mason School District 403 W.O. 8843 1 P.O. Box 167 Belfair , Wa. 98528 Attention: Mr. Chuck Jeu Project Coordinator Subject : Addition to Belfair Elementary School Gentlemen : I have completed a soils investigation for the new addition to Belfair Elementary School . A brief description of the investigation is presented in this report , together with indicated recommendations . PROPOSED PROJECT The new addition is shown on Plate 1 . The primary portion is a two-level addition extending westerly from the existing two classroom buildings ( in the hillside area now occupied by the concrete stairs ) . The lower level is to be at the lower parking lot level , with the upper level matching the floor levels in the existing buildings . j I There is also a much smaller single-story addition located on the north end of the existing building. Wood-frame construction with brick veneer is anticipated i throughout. INVESTIGATION !, Soils conditions in the addition areas were explored by making a series of seven backhoe-excavated test pits, at the locations shown on the Site Plan , Plate 1 . These were made on September 1 , 1988 , by Ron 's Earthworks of Tacoma. Terrain conditions and location of underground utilities seriously restricted locations available for exploration. Logs of the test pits are included in the Appendix . Soil descriptions on these logs are on a visual basis and are in accordance with the Unified Soils Classification System. Moisture and density conditions as described are qualitative only, with moisture conditions expressed on a dry-moist-wet basis . continued - i - Belfair Elementary School Addition W.O. 8843 September 16 , 1988 Page 2 INVESTIGATION , continued . Laboratory testing was limited to running two grain-size tests on random soil samples . Results of these tests are shown on the test data sheet in the Appendix . SOIL CONDITIONS Native soils encountered are primarily granular , in a dense condition. Soils at the upper level and over most of the slope are silty sands and gravels , and exhibit local very weak cementation. Soils on the lower level are dense sands and gravels . About two feet of native fill material was encountered between the two existing classroom buildings , and almost seven feet of very organic fill in the small addition area at the north end . o No groundwater was encountered in any of the test pits , which were made subsequent to a prolonged dry period . The site lies at the foot of a long slope , which has a history of relatively heavy groundwater seepage during wet weather. It is fully anticipated that groundwater may be encountered during construction in normal winter conditions . RECOMMENDATIONS The additions may be supported on conventional spread footing foundations. In all cases , an overload factor of 1/3 for seismic loads is considered appropriate. Footings at the lower level may be at frost depth , bearing on undisturbed native sand and gravel . Footings on this material may be designed for a maximum soil bearing pressure of 4000 psf , with a minimum footing width of 16 inches . Maximum anticipated settlement is less than 3/4 inches. Footings for the second story level may be on undisturbed native silty sand and gravel at a depth of two feet below existing ground . Footings at this level may be designed for a maximum soil bearing pressure of 4000 psf , with a minimum footing width of 16 inches . Maximum anticipated settlement is less than 3/4 inches. s continued - Grover C. Way, P.E. Belfair Elementary School Addition W.O 8843 September 16 , 1988 Page 3 RECOMMENDATIONS , continued . _ The north addition area should be prepared by removing all of the existing fill material and topsoil so as to expose the underlying silty sand and gravel . Depth of removal should be such as is required to expose undisturbed native soil ; r anticipated removal depth is on the order of seven feet . Backfill material should be clean well-graded sand and gravel conforming to the following specification: Sieve Size Percent Passing 4-inch 100 -inch 25 to 70 No. 200 10 max Percent Passing #200 _ Dust Ratio = percent Passing #40 2/3 max Sand Equivalent = 35 min Fill material should be placed in essentially horizontal lifts not exceeding eight inches loose thickness and compacted to at least 95 percent of maximum density , ASTM D-1557 . Footings may be at frost depth, bearing on the compacted fill . Footings should be designed for a maximum soil bearing pressure of 2000 psf; maximum anticipated settlement is less than 3/4 inches. Minimum footing width should be 16 inches . A six-inch granular subbase conforming to the structural fill specification above should be provided beneath all floor slabs . Prior to placing the gravel mat the subgrade should be compacted such that the top six inches is at least 90 percent _ of maximum density , ASTM D-1557 . The grannular subbase should be compacted to at least 95 percent of maximum density, ASTM D-1557 . At the lower level , a sub-floor underdrain should also be provided, at an invert depth of 18 inches below bottom of slab. The underdrain should be north-south at the approximate midpoint of the lower level . It should be slotted ( not perforated ) underdrain pipe , bedded and surrounded with pea gravel . Footing drains should also be provided at all exterior footings throughout the project . continued - Grover C. Way, P.E. Belfair Elementary School Addition W.O. 8843 September 16 , 1988 Page 4 RECOMMENDATIONS, continued . Backfill for basement walls for the lower level should be uncompacted pea gravel , with a slotted ( not perforated ) underdrain at the base of the wall . Basement walls may be designed for a lateral pressure of 35 pcf equivalent fluid pressure . The second-level floor system over the wall backfill should be structural , with the east end supported on a footing bearing on undisturbed native soil , approximately 23 feet west of the retaining wall . — I appreciate the opportunity to be of continuing service to the District . Please call if there are any questions regarding my report . °` ��•�,,,C i ectf bmi ted , J . Grover C. Way , P. E. -�� Soils Engineer c/ Erickson McGovern Architects Chalker Putnam Collins Scott Grover C. Way, P.E. a r: k z E 6 SCALE: 1 =50 O - a PROPOSED CONSTRUCTION. 02 TEST PIT NUMBER AND LOCATION. I i BELFAIR ELEMENTARY SCHOOL Grover C. Way, P.E. CONSULTING SOILS ENGINEER SITE PLAN E1E upn e%MAZ VcDTcuQcD 1020 D1 ATC Belfair Elementary School Addition W.O. 8843 September 16 , 1988 LOGS OF TEST PITS Test Pit # 1 _ (Completed 9-1-88 ) 0 - Topsoil . i - 5 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Dry , Dense . 5 - 11 Brown Fine to Coarse Sand and Fine to Coarse Cobbles (GW) , Dry to Moist , Dense . Test Pit # 2 (Completed 9-1-88 ) 0 - 1 1Topsoil . z - 4 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Dry , Dense . 4 - 10 Brown Fine to Coarse Sand and Fine to Coarse Gravel and Cobbles (GW) , Dry , Dense . Test Pit # 3 (Completed 9-1-88 ) 0 - i ITopsoil . i - 9 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Dry, Dense. Test Pit # 4 (Completed 9-1-88 ) 0 - i ' Topsoil . i - 10 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Dry, Dense. Grover C. Way, P.E. i Belfair Elementary School Additions W.O. 8843 September 16 , 1988 LOGS OF TEST PITS , continued. Test Pit # 5 (Completed 9-1-88 ) ^ 0 - 1; Asphalt . 14 - 8 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Dry, Dense to Weakly Cemented. Test Pit # 6 (Completed 9-1-88 ) 0 - 1 a '� Asphalt . # 14 - 1i Grey Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Moist , Medium Dense (probable fill ) . Test Pit # 7 (Completed 9-1-88 ) 0 - 6 Fill - Grey Organic Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , w/Wood and Topsoil , Moist , Medium Dense. 6 - 6i Topsoil . 64 - 9 Brown Silty Fine to Coarse Sand and Fine to Coarse Gravel (GM) , Moist , Medium Dense . a Grover C. Way, P.E. , ANUL WIN am= OR M INS 10 Ell Ell IM so lMM ME mum Is ��.■ fir, ��.�■.MOM�■ ■�■.�� • OEM MOM 6 MOM SOMMOR no in ME M ME IS Ell WOOM I OEM am r • r r