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HomeMy WebLinkAboutBLDR-5-10-7001 foundation soil eval report.tif 0*20/2010 16:55 8282566921 UNIFOUR HKV PAGE 01104 r . UNIFOUR ENGINEERING & TESTING LABORATORIES P.O. BOX 2067 HICKORY, NC 28603 PhonelFax: 828-256-30001828-256-6921 DATE: Mayl 20, 2010 TO: Mr. Jeff Keever COMPANY: Jeff Keever Construction, Inc. REFERENCE: Deporre Residence FAX NUMBER: 82 -0101 FROM: Michael W. Sloan, P.E. NUMBER OF PAGES: 4 i Comments: Attached please find the Foundation Soil Evaluation Report for 05 -20 -10 on the above referenced project. Thank You! Kathy i CC_ Mr. Ben Holden, Catawba County Building Inspections, Fax #828 -322 -6814 i f 1 05`2012010 16:55 8282566921 UNIFUUR HKY PAGE 02104 • i I May 20, 2010 Mr, Jeff Keever JEFF KEEVER CONSTRUCTION, INC. fax: 828- 466.0101 1110 North NC Hwy. 16 Conover, NC 28613 -8946 RE: Report of Foundation Soil Evaluation Deporre Residence j Hickory, North Carolina { Unifour Job Number 3531A Dear Mr. Keever: As you requested, Unifour Engineering & Testing Laboratories, PC (Unifour) was retained to test and observe the shallow foundation soil for the Deporre Residence metal building project located in Hickory, North Carolina. The footing contractor had excavated the fooling lines to the apparent design grades and bearing lines prior to Unifour's arrival on -site. Unifour's scope did not include investigation of deep subsurface conditions or the development of engineering recommendations for foundation design. E"amic Cone Penetrometer (DCP) tests were performed in the soil within the I foundation footprint of the proposed structure at the bottom of footing elevation (13017) and as deep as 2 feet below BOF. The DCP test is perfomned by driving a 1 Yz inch diameter steel cone into the soil using a 15 -pound weight falling 20 inches. The number of blows required to drive the cone 1% inches is designated as the Cone Penetrometer Resistance and is recorded in units of 'blows per increment' or bpi. The test procedure is described in ASTM Special Technical Publication STP -399. The DCP test values were correlated to an estimated Standard Penetration Resistance (N- value) based on the soil type, using procedures described in STP -399. The field data and estimated N- values are presented in the attached Report of Dynamic Cone Penetrometer Test forms. The foundation soil encountered at and below the BOF at the test locations consisted predominately of silty sands and sandy silts. The estimated N- values indicated in the DCP tests were generally greater than 8 blows per foot (bpf). U • ni our IB79 L,tAwaaeS3Y • Na9hC Zed(►S Engineering &Testing Laboratories, PC I i 1 j 0,/20/2010 16:55 8282566921 UNIFOUR HKY PAGE 03104 E Fourdlabon Soil Evatuatm4531A May 20, 2010 Jeff Keever Consfit0 n, Im., Hickory; NC Page 2 According to information provided by the contractor, the foundation design and footing widths for this structure are based on an assumed allowable soil bearing pressure of 2,000 pounds per square foot. Based on the DCP results and soil classifications, as well as the observation of the final excavations, the foundation soils at the test locations and depths should be suitable for the design allowable bearing pressure. i Since bearing capacity of soil is partly a function of soil type and footing width, these test results should be considered valid only for the locations and elevations noted at the time of our testing. Please note that Unifour also recently provided part -time soil density testing services during the fill placement operation. The test results met a minimum of 95% of the standard proctor maximum dry density at the locations tested. We appreciate the opportunity to be of service to you on this phase of the project If we can provide any additional engineering or testing services please contact us. Respectfully submitted, UNIFOUR ENGINEERING & TESTING LABORATORIES, PC By, o Michael W. loan, P. E. Senior Engineer SEAL I Registered, PC 025776 025776 1 Date: zO ,zo/a t;`G1N• y��rrrF� W;s,a Attachments: Report of DCP Test 05 -20 -10 CC: Mr. Ben Holden, Catawba County Building Inspections l i 05/20/2010 16:55 8282566921 UNIFOUR HKY PAGE 04104 s di , co m O T C4 s� V ,�, r W (a �o � + z a L C D w. 1+ , I 11] O C%4 O d I+ 1 0 H ao j 0 m 0 w y r N r r r r T T O �o ° 0 w = h N c0 N N W to r N ao LL 4 N a d 0 ao •� W Z w O 0 m O n � d 4 O w 4 CD r oz (� z t r N r r r r N 0 0 LLl 0. m Z m ILL �^ z m 0 H �D ois H O z m N 0 (n � z—�, a _z _j _jz o a a 0 o 4 W W z z =, w -A w =, w � � � � � ►- � � � U ? ~ O O coZ �Z �z J J Z J J J f/1 J J W v z LL Z LL Z � m ¢ co w U) 0 a m W w ❑❑ d 0 0 0 v Z U. le w w 2 w w W or W W F U) ua Z s z LU w M U U U O _ CL m O Q -1 W 0 p W V W O W z � }� tj W W J� 1 Z z a a © �- 4K _ Q 1- z (� W Q V R J W r a W w w w Z� 4 z z z z z J _l m J Q W LL LL LL LL 9 z U? 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