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HomeMy WebLinkAboutConstruction Observation and Testing Completion 11.11.16H-P~KUMAR Geotechnlcal Enoineering \ Engineering Geology Materials Testing I Envlfonmenlal 5020 County Road 154 Glenwood Springs, CO 51601 Phone: (970) 945· 7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa.com Olfice Localions: Parker, Glenwood Springs, and Silverthorne, Colorado November 11, 2016 Silich Construction, Inc. Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81612 scott@silichhomes.com Project No. 16-7-250 Subject: Construction Observation and Testing Completion Letter, Proposed Residence, Lot 253, Ironbridge Development, Eagle Claw Circle, Garfield County, Colorado Gentlemen: As requested , we are providing a summary of our observation and testing services provided for the above referenced project. The reports of the services requested and performed for the subject project are attached. Hepworth-Pawlak Geotechnical (now H-P/Kumar) previously conducted a subsoil study for design of foundations at the site and presented our findings in a report dated October 16, 2015, Job No. 113 471R. The foundation bearing soils within the building excavation were observed and tested for compaction between July 20 and 25, 2016 and are suitable for the recommended bearing pressure of 1,500 psf. Grade beam reinforcement steel and the post-tensioned slab tendons were observed on August 8, and the fresh concrete for the foundation was sampled on August I 0, 2016. Tensioning of the tendons was observed and elon~ations recorded on August 15, 2016 per the project specifications. The results of the tendon tensioning were submitted to Fuhrmann & Graf for their approval. We did not observe placement of rigid foam insulation along the building perimeter, but since the perimeter grade beam has a minimum depth of 36 inches, it provides adequate frost protection rathe r than by insulation. Based upon inferences drawn from our observations and testing, as documented by the attached daily field and laboratory reports , it is our professional opinion that the referenced construction has achieved the specified conditions. Please recognize that construction observation and testing are sampling functions that involve direct observation and testing of very limited amount of the overall work to evaluate the construction compliance. If you have any questions or need further assistance, please call our office. Sincerely, H~P~KUMAR H-P~KUMAR 5020 County Road 154 Glenwood Springs , CO 81601 Phone: (970} 945-7988 Fax: (970) 945·8454 Emall: bpfsglenwood@kumarusa .com Office Locati ons : Parker, Glenwood Springs, and Silverthome, Colorado Earthwork Compaction Testing Report Client: Sillch Construction Job No.: 16-7-250 Day: Wednesday Attn: Scott Henriksen Date: 7/20/16 303 AABC, Suite J Page: 1 of 1 Aspen, Colorado 81611 Project: Lot 253, lronbridge Development, Eagle Claw Circle, Garfield County, Colorado Weather: Cloudy, light wind, dry Temperature: 82° at 4:30 pm Earthwork Contractor: Logan Equipment Used: Trackhoe, dump truck, fire hose, Wacker RT remote double drum roller Description of Earthwork First lift of underslab fill using locally derived gravelly silt with sand had been Tested: placed and compacted. Two of three tests performed indicated below recommended compaction with moisture contents about 2% below optimum, referencing Proctor of similar material previously sampled from Lot 172. Verbal Communication : Logan was informed of our test results. We recommended wetting the lift and allowing it to soak in overnight, then recompacting and re-testing. Logan scheduled re-testing for 11:00 am. 7/21/16. Placement and Compaction Procedure: Reported by the Contractor. Lift Thickness: 1 foot max Max. Rock Size: 6" Moisture fire hose and trackhoe Conditioning: mixing in stockpile Compactor(s) Used: Wacker RT remote double drum roller Number of Passes: Not reported Nuclear GauQe Moisture/Densitv Test Results Location Field Ory Field Field Min. Test Depth or Moisture Comp. Proctor No. Elev. Density Content Comp. Req. Lab No. Underslab fill (pcf) % (%) (%) 1 10' NE of SW corner of building 1• below slab 114.3 8.4 93 98 222-15 subgrade 2 10' SE of NW corner of building 1' .below slab 120.1 10.5 98 98 ' 222-15 subgrade 3 10' W of E edge at center of E 1' below slab 115.7 7.7 94 98 222-15 side of building subgrade Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 222-15 (115066F) ASTMD 698 Gravelly Slit with Sand 123.0 10.3 THIS R£t'Ul<l PRESEtllSOPINIONS AS A RESUl.T OF OUR OIJS..,.vATIONSOF Fill PLACc .. cNT W£ HAvt RELIED OH 1~ COllTRACTOR TO CONTI NUE APPL TlffG lHE RECOMIEHOEO COMPACTIVE EFFORT AHO MOISTURE TO FA.L CURING THE TIMES WHEN 01111 OBSERVER IS HOT OBSERVING OPERATIONS THe NUCLEAR OENSOMETER METHOD OF TUTINO WAS USEO IN SUBSTANTIAi. ACCORDAHCE WITH ASTM 0 w.MI Distribution: Sllich Construction -Scott Henriksen C190NbJffcbbor.utM;oml TJW/ Thomas J . Westhoff, CET Steven L. Pawlak, P.E. Field Technician Reviewed By H-P~l<U MAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hokglenwood@lsumanga.coro Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Earthwork Compaction Testing Report Client: Silich Construction Job No.: 16·7·250 Day: Thursday Attn: Scott Henriksen Date: 7/21/16 303 AABC, Suite J Page: 1 of 1 Aspen, Colorado 81611 Project: Lot 253, lronbridge Development, Eagle Claw Circle, Garfield County, Colorado Weather: Cloudy, light wind, dry Temperature: 82° at 4:30 pm Earthwork Contractor. Logan Equipment Used: Trackhoe, dump truck, fire hose, Wacker RT remote double drum roller Description of Earthwork Since our last visit the first lift of underslab fill using locally derived gravelly Tested: silt with sand had been wetted and re-compacted. Tests performed indicated acceptable compaction with moisture contents ranging from 1.5% below to 1.9% above optimum, referencing Proctor of similar material previously sampled from Lot 172. Verbal Communication: Logan was informed of our test results. He informed us that the top lift material will be 1Y2 inch aggre9ate base course im~orted from the Siever Pit Placement and Compaction Procedure: Reported by the Contractor. Lift Thickness: 1 foot max Max. Rock Size: 6" Moisture fire hose Conditioning: Compactor(s) Used: Wacker RT remote double drum roller Number of Passes: Not reported Nuclear Gauge Moisture/Density Test Results Location Field Dry Field Field Min . Test Depth or Density Moisture Comp. Comp. Proctor No. Underslab fill Elev. (pcf) Content (%) Req. Lab No. % (%) 1A Re-test of #1(7/20/16)1 O' NE of 1' below slab 121.2 10.6 99 98 222-15 SW corner of building subgrade 1 Center of building (near test #2 1' below slab 121.3 12.2 99 98 222-15 of 7/20/16) subgrade Re-test of #3 (7120/16) 1 O' W of E 1' below slab 3A ed ge at cent er o f E side of subgrade 120.6 8.8 98 98 222-15 building Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 222-15 (115066F) ASTM D 698 GravelJv Silt with Sand 123.0 10.3 THIS REPORT PRESENTS OPINIONS AS A RESUlT OF OUR OBSEltVAllOllSO~ Fill PLACEMENT we tv.VE REUED ON THC CONTRACTOR TO CONTIH\JE APPLYING THE R£COMMEN0£D COMPACTl\IE EFFORT AND MOISTURE TO Fill OURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERWIG OPERATIONS THE NUCLEAA DEHSOMETER METHOD Of TESTING WA:S USEC IN SUBSTANTW. ACGOROANCE WITHASTM 06938 Distribution: Silich Construcllon -Scott Henriksen flcolMbll!chbomn ·coml TJW/ Thomas J . Westhoff, CET Steven L. Pawlak, P.E. Field Technician Reviewed By H -P ~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hokalenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado CONSTRUCTION ACTIVITY REPORT Client: Silich Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 Job No.: 16-7 -250 Day: Date: Page: Friday 7/22116 1of1 Project: Lot 253. lronbridge Development, Eagle Claw Circle. Garfield County, Colorado Weather: Partly cloudy. calm, dry Contractor's Construction Activities: Equipment in Use: HP Geotech's Site Activities: Verbal Communication: d islribulion Temperature: 62°F at 8 :45 am. 87°F at 3 :15 pm Logan was importing. placing and moisture-conditioning 1 W' aggregate base course from the Si evers Pit for the top 1 foot Ifft of under slab fill. He requested nuclear gauge moisture checks in the morning to assist his moisture conditioning of the material. Track hoe, dump truck, fire hose As requested, we visited the site in the morning and performed several nuclear gauge moisture readings in the conditioned base course lift. Moisture readings ranged from 5 to 6.5% which we judged to be close to optimum. Logan was informed of our moisture test results. He requested a return visit for compaction testing in the afternoon. We returned in the afternoon and the contractor was not on s i te. The lift was not complete and no compaction had been performed, so no tests were performed. Slllch Construction -Scott Henriksen CteottOtlUcl!bomn.cem> Thomas J. Westhoff, CET Steven l. Pawlak, P .E. Field Technician Reviewed By TJW/ H-P~KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax:(970)945-8454 Emall: hokglenwood@llsuroarusa .com Office LocaUons: Parker, Glenwood Springs, and Sllverthome, Colorado Earthwork Compaction Testing Report Client: Silich Construction Job No.: 16·7·250 Day: Monday Attn: Scott Henriksen Date: 7/25/16 303 AABC, Suite J Page: 1 of 1 Aspen, Colorado 81611 Project: Lot 253, lronbridge Development, Eagle Claw Circle, Garfield County, Colorado Weather: Partly cloudy, light wind, dry Temperature: 73• at 10:15 am, as• at 1:20 pm, so• at 3:15 pm Earthwork Contractor: Logan Equipment Used: Trackhoe, dump truck, fire hose, Wacker RT remote double drum roller Description of The top lift of underslab fill us1ng 1% aggregate base course was moisture Earthwork Tested: conditioned, fine graded and compacted. Four site visits were made today as requested for moisture checks and compaction testing until acceptable compaction tests were obtained, referencing typical Proctor for the source. Verbal Logan was Informed of our test results. Communication; Placement and Compaction Observed by H-P Kumar Procedure: Lift Thickness: 1 foot max Max. Rock Size: 1%" Moisture fire hose Conditioning: Compactor(s) Used: Wacker RT remote double drum roller Number of Passes: Not observed Nuclear Gauge Moisture/Density Test Results Location Field Ory Field Field Min. Test Moisture Comp. Proctor No. Depth or Elev. Density Content Comp. Req . lab No. Underslab fill (pcf) % {%) (%) 1 13• NE of SW corner of building slab subgrade 137.7 5.0 98 98 Typ. 2 1 O' SE of NW corner of building slab subgrade 133.4 4.8 95 98 Typ. 3 20' NW of SE corner of building slab subgrade 133.8 5.2 96 98 Typ. 2A Re.test of #2 above slab subgrade 136.8 4.2 98 98 Typ. 3A Re-test of #3 above slab subgrade 136.9 5.1 98 98 Typ. 4 15' SW of NE corner of building slab subgrade 137.1 4.8 98 98 Typ. Proctor Sample Reference: Lab No. Method Description Max. Ory Opt. Dens.{%) Moist.{%) Typical ASTM 0698 1 1/2" aaarenate base course, Sievers Pit 140.0 5.5 THIS m:nm1 ,."~ 15 OPINIONS MA l'IESULt Of OUR OBSERVATION;:our FIU PlACEMENT wt HA~ ON TKt CQNIBM<Tun To.., ""nut: APPLYIHO TI1E ~CUMn1CnUED COMPACTIVE EFFORT AND MOISTURE TO Fill DURING TllE tatE5 WHEN OUR OBSERVER IS NOT 08SEIMNG OPERATIONS TIE HUCLEAR DENSOtJETER METHOO OF TESTING WAS USED 1H SUBSTNftlAl ACCORDAHCE WITH ASTM D 6931 OlstrlbuUon: Slllch ConslrucUon -Scott Henriksen f1eou01Ulc;hhomp.com) TJW/ Thomas J. Westhoff, CET Steven L. Pawlak, P .E. Field Technician Reviewed By H-P~KUMAR 5020 County Road 1 S4 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpk~ru!l.CQOJ Office LocaUons: Parker, Glenwood Springs, and Sltverthome, Colorado REINFORCEMENT STEEL INSPECTION REPORT Client: Slllch Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 Project No.: 16-7-250 Day: Monday 08108116 1 of 2 Date: Page: Project: Lot 253, lronbridge Development, Eagle Claw Clrcle, Garfield County, Colorado Area of Inspection: Rebar for trenches of post tension slab. Reference Documents Sheets F1 or FD1. Used: Inspection Notes: Inspection Status : D Preliminary (8] Final [81 Concrete reinforcement as noted above was judged to be in reasonable conformance with the referenced construction documents. D Exceptions Noted · Verbal Communication : Oistribulion. Scott Henriksen was informed that rebar was Installed according to construction documents. Stllch Construction -Scott Henriksen flq9"0dl1bhamtJ•!i9fll 11 /JKO Paul Weiser Steven L. Pawlak, P.E. Field Technician Reviewed By H-P~l<UMAR 5020 County Road 154 Glenwood Sprfngs , CO 81601 Phqne: (970) 945-7988 Fax:(970)945-8454 Email: tui1s•OWOC!dcmsum•rusa·conl Office locations: Parker, Glenwood Springs, and Silverthorne, Colorado REINFORCEMENT STEEL INSPECTION REPORT Client: Sillch Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 Project No.: 16·7·250 Day: Date: Page: Monday 08/08/16 2 of 2 Project: lot 253, Iron bridge Development, Eagle Claw Circle. Garfield County, Colorado Area of Inspection: Tendons for post tension slab Reference Documents Structural Plans Used: Sheets F1 or FD1 Inspection Notes: Inspection Status : D Preliminary 181 Final (8J Concrete reinforcement as noted above was judged to be in reasonable confonnance w ith the referenced construction documents . D Exceptions Noted : Verbal Communication: Distribution : Ray with Silich was informed of our inspection. Slllch Construction -Scott Henriksen (acottO!lllcbhomu.com ) /JKO Paul Weiser Steven L. Pawlak. P.E. Field Technician Reviewed By H-P~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Silich Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 CONCRETE TEST REPORT Project No. Dale Cast: Sheet: 16-7-250 08-10-16 1of2 Project: Lot 253, lronbridge Development, Eagle Claw Circle, Garfield County, Colorado Placement Location: Post-Tensioned Slab Supplier: United Time Batched: 7:56 am Load Size (Yds): 10 Truck No: 6313 Time Arrived: 8:27 am Yds Delivered: 40 Ticket No: 33308139 Time Placed: 8:36 am Y ds Ordered: 130 Mix Design: 36510502 Method of Placement: Pump Sample Point: Truck Discharge Time Sampled: 8:38 am Wet Unit Wt: 142.4 pcf SQecifications: Air Temp: 70° Slump: 4.0 inches Slump: 4 to 6 inches Concrete Temp: 76° Air Content: 4.0% Air Content: 3to8% Water Added: none Communication: The contractor and supplier were informed of our field test results. Time Cylinders Cast: 8:48 am Initial Cure Time On Site: 1 day Field Storage: Water bath Dale in Lab: 08-11-16 Cylinder Temperalure al Pick Up: 83° Min/Max: 58°/90° Compressive Strength Data 2016 Compressive 28 Day Lab Age Date Load Diameter Area Strength (psi) Number Days lbs. In. in2 Avg. (psi) 489A 5 08-15-16 53,000 4.01 12.63 4200 4898 7 08-17-16 64,800 4.01 12.63 5130 489C 28 09-07-16 90,600 4.01 12.63 7170 4890 28 09-07·16 89,100 4.01 12.63 7060 7070 489E 28 09-07-16 88,300 4.01 12.63 6990 Specified Strength for Structure: 4500 psi at 28 days Specified Strenglh for Mix: 4500 psi at 28 days Notes: United representative stated that information on the concrete ticket is wrong. Distnbuhon· SJllch Construction -Scott Henrlksen (scott@sllJcnhomes.com J Unlted Companies Distribution List Paul Weiser Field Technician Thomas J. Westhoff, CET Reviewed By H-P~l<UMAR I• • 5020 County Road 154 Glenwood Springs, CO 81601 Phone : (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa .com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Silich Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 CONCRETE TEST REPORT Project No. Date Cast: Sheet: 16-7-250 08-10-16 2 of2 Project: Lot 253, lronbrldge Development, Eagle Claw Circle, Garfield County, Colorado Placement Location: Post-Tensioned Slab Supplier: United Time Batched : Truck No: O Time Arrived: Ticket No: 33308144 Time Placed: Mix Design: 36510502 Method of Placement: Pump Time Sampled : 9:42 am Wet Unit Wt: 9:02 am 9:30 am 9:40am Load Size (Yds): 10 Yds Delivered: 90 Yds Ordered: 130 Truck Discharge Specifications: Air Temp: Slump: Concrete Temp: 76° Air Content: Sample Point: 142.4 pcf 5.0 inches 4.0% Slump: Air Content: 4 to 6 inches 3to8% Water Added: 5 gallons per contractor Communication: The contractor and supplier were informed of our field test results. Time Cylinders Cast: 9:52 am Initial Cure Time On Site: 1 day Field Storage: Water bath Date in Lab: 08-11-16 Cylinder Temperature at Pick Up: 83° Min/Max: 58,,/90° Compressive Strength Data 2016 Compressive 28Day Lab Age Load Diameter Area Date Strength (psi) Avg. (psi) Number Days lbs . in. in2 490A 5 08-15-16 51,400 4.01 12.63 4070 4908 7 08-17·16 65,800 4.01 12.63 5210 490C 28 09·07"16 85,600 4.01 12.63 6780 4900 28 09-07-16 86,100 4.01 12.63 6820 6770 490E 28 09-07-16 84,900 4.01 12.63 6720 ...__ -Specified Strength for Structure: 4500 ps1 at 28 days Specified Strength for Mix: 4500 psi at 28 days Notes: United representative stated that information on the concrete ticket is wrong. D1slribuhon· Sllich Construcllon -Scott Henriksen (scott@silichhomes.com) United Companies Dlstribullon List Paul Weiser Field Technician Thomas J . Westhoff, CET Reviewed By H-P·~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: {970) 945-7988 Fax: {970) 945-8454 Email : hpkC!lenwoosl@kumarusa.qom Office Locations: Parker, Glenwood Springs, and Silverthorne , Colorado POST TENSIONING FIELD REPORT Client: Sllich Construction Attn: Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 Project No.: 16·7·250 Day: Date: Page: Monday 8/15/16 1Of2 Project: Lot 253, Iron bridge Development, Eagle Claw Circle, Garfield County, Colorado Weather: Clear, Calm, Dry F ield Notes: Cable tensioning was performed by Gary Anderson with K&G Rebar using Jack #539 starting at the west side and continuing on the south side. Tendon Location Jacking Force Gauge Reading Calculated Elonaation Cin.) Measured No. (kips) (psi) A West Side 33 5400 B West Side 33 5400 c West Side 33 5400 0 West Side 33 5400 E West Side 33 5400 F West Side 33 5400 G West Side 33 5400 H West Side 33 5400 I West Side 33 5400 J West Side 33 5400 K West Side 33 5400 L West Side 33 5400 M West Side 33 5400 N West Side 33 5400 0 West Side 33 5400 DlslrlbutiOn . Sillch Construction -Scott Henriksen (!COtl@slllchhqmn.com> Slllch Construction -John Slllch UllUcblltt~) Fuhrmann & Graf -Nalhan Graf (npq1Jfftfuhrmannenalneertna.com> Minimum 4'/z 4Yz 4'/z 4% 4'/z 4Y4 4Y4 4y .. 4 4 3% 3% 3'l'. 3'l'. 3Ya Paul Weiser Field Technician Maximum Elongation {in .) 5% 5 5% 5 SY2 4Y. 5'/z 5 5Yz 5y, 5y, 5 51/4 4% 5114 4l/4 5 4% 5 4% 4% 4~ 4o/4 4y, 4% 4Y4 4% 4y. 4l/4 4Y4 Steven L. Pawlak, P.E. Reviewed by H-P~KUMAR 5020 Counly Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkgleowood@kumarusa.com Office Localions: Parker, Glenwood Springs, and Silverthorne , Colorado POST TENSIONING FIELD REPORT Client: Silich Construction Attn : Scott Henriksen 303 AABC, Suite J Aspen, Colorado 81611 Project No.: 16-7-250 Day: Date : Page: Monday 8/15/16 2of2 Project: Lot 253, lronbridge Development, Eagle Claw Circle, Garfield County, Colorado Tendon Location Jacking Force Gauge Reading Calculated Elonaation (in ) Measured No. (kips) (psi) Minimum Maximum Elongation (in.) 1 South Side 33 5400 H'• 2o/a 1% 2 South Side 33 5400 2v. 3% 3Ya 3 South Side 33 5400 2-v. 3% 2v. 4 South Side 33 5400 2v. 3% 3 5 South Side 33 5400 2Va 3% 3 6 South Side 33 5400 2% 3% 3 7 South Side 33 5400 2% 3% 3 8 South Side 33 5400 2v. 3% JV. 9 South Side 33 5400 2'l'1 3% 3 10 South Side 33 5400 2v. 3% 3 11 South Side 33 5400 2v. 3% 3Ya 12 South Side 33 5400 27/a 3Y2 3 13 South Side 33 5400 2v. 3Yz 3Y. 14 South Side 33 5400 2'¥1 3Yz 3y. 15 South Side 33 5400 2Y1 3Y2 3% 16 South Side 33 5400 2v. 3'/z 3% 17 South Side 33 5400 2% 3Y2 JV. 18 South Side 33 5400 2¥. 3Y2 3y. 19 South Side 33 5400 2v. 3'12 3y. 20 South Side 33 5400 13 1'¥1 1% 21 South Side 33 5400 o/.c 1~ 1 Distri bution. Slllch Construction -Scott Henriksen tKotlO!IHchlJ2mn.comt Slllch Construction -John Sllich t l!![!cbO!!lcbconslrudOn.coml Fuhnnann & Graf -Nathan Graf lnearafGJuhnn•nnenalneerlna.com> Paul Weiser Steven L. Pawlak, P.E. Field Technician Reviewed by