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HomeMy WebLinkAbout1725 E Prospect Rd - Special Inspections/Engineering - 12/09/2008December 9, 2008 Drahota Commercial LLC 4700 Innovation Drive, Building C Fort Collins, CO 80527 Attn: Sarah Bucholt Re: Construction Materials Compliance Summary Eye Center of Northern Colorado 1725 East Prospect Road Fort Collins, Colorado 80525 Project No. 20081017 Dear Ms. Bucholt: Irerracon Consulting Engineers & Scientists Terracon Consultants, Inc. 301 North Howes Fort Collins, Colorado 80521 Phone 970.484.0359 Fax 970.484.0454 www.terracon.com At your request, we have reviewed the construction materials testing documentation prepared by Terracon during construction phases of the referenced project. Our services on the project have included performing laboratory testing of the soils for compliance with the project specifications and the Geotechnical Engineering Report recommendations prepared by Empire Laboratories, Inc. (dated October 10, 1991; Project No. 9047-91) and the Geotechnical Engineering Report for the proposed elevator prepared by Terracon (dated February 20, 1997 Project No. 20975014). Terracon also performed in -place field density testing during placement of the fill to check maximum density and moisture control. We also performed reinforcing steel observations, structural steel/weld/bolt observations, and concrete testing. All testing and observations were performed on an "as requested" basis. Earthwork As recommended in the soils investigation, on -site or approved imported soils were suitable for placement during construction. Laboratory tests indicated fill material tested by Terracon met the recommendations as outlined in the geotechnical report. The results of the field and laboratory testing were forwarded for review. In addition, the on -site superintendent and subcontractors were informed on a daily basis of the test results performed. Terracon performed 21 in -place moisture-density/compaction tests of the subgrade for the curb and gutter, sidewalk, and parking lot. The tests at the locations indicated met or ultimately achieved (after retesting) compaction specification requirements with the exception of report No. 20081017.0012(attached for reference). Our test results represent only the materials at the location and time of testing. Terracon did not direct nor control the fill placement and compaction at the site and does not assume responsibility for the placement, compaction or control of the fill materials. Areas of fill which are not representative of our testing may exist, particularly in common fill areas such as slopes or landscaped areas outside the limits of the building pad. Delivering Success for Clients and Employees Since 1965 More Than 95 Offices Nationwide Eye Center of Northern Colorado 1725 East Prospect Road Fort Collins, Colorado Project No. 20081017 Page 2 Concrete Terracon The Portland cement concrete placed and tested on -site consisted of 5 tests for physical property and compressive strength tests of the footing foundation(s), second floor slab, and sidewalk. The reports indicate the specified minimum compressive strength requirements for the project have been achieved. It is recommended that the project engineer of record review the reports for acceptance as meeting the project criteria. Reinforcina Steel Terracon provided reinforcing steel placement observations in the east and west footing foundation(s) concrete placements as requested. The observations were performed per the provided plans and specifications for the project and have been formally reported to the client and designated parties. It is recommended that the project structural engineer review the observation reports for acceptance as meeting the project criteria. Structural Steel/Weld/Bolts and Fire Proofing Observation Intermountain Testing Company provided structural steel/weld/bolted connection and fireproofing observations during site construction. Observations were provided to on -site personnel at the time of the visit with a written report as documentation. The observation report dated March 26, 2008 and associated RFI No. 17 are attached for reference. It is recommended that the project structural engineer review the observation reports for acceptance as meeting the project criteria. Foundation Terracon provided observation of the footing foundation(s) and open -hole excavations as requested during construction. A summary of the observations and structural review response items were provided in written reports upon completion. Per Terracon's geotechnical report and observations performed, foundation(s) have been placed in general accordance with the plans and specifications and were placed on the anticipated bearing material identified in our geotechnical report. Closure This report has been prepared for the exclusive use of providing test data and observations to document the reinforcing steel, structural steel/weld/bolt, and concrete testing operations conducted for the proposed project. The opinions and conclusions presented have been derived in accordance with generally accepted geotechnical and material engineering practice. No other warranty expressed or implied is made. In the event that there are any changes in the nature or design of the project, the conclusions contained in this report shall not be considered valid unless this firm reviews such changes, and the conclusions of this report are modified or verified in writing. No Text No Text No Text No Text