Laserfiche WebLink
STRUCTURAL02h, <br />/GROUP <br />Proposal No. 109646 <br />March 25, 2010 <br />AECOM Transportation <br />Mr. Gregory W. Heftner, PE <br />999 W. Town & Country Road <br />Orange, CA 92868 <br />Los Angeles Division <br />15552 Commerce Lane <br />Huntington Beach, CA 92649 <br />Phone 714.891-9080 <br />Fax 714-897.0163 <br />www.structural.net <br />Structural Group, Inc. <br />CA License #:776932 <br />Re: Fiesta Marketplace Parking Structure- Post Tension Inspection and Repair <br />Dear Mr. Heftner: <br />Thank you for giving Structural Group, Inc. (SG) the opportunity to prepare a repair proposal for the <br />post tension cables at the Fiesta Marketplace Parking structure. The post tension appears to be in <br />good condition with the exception of several exposed tendons in each garage. In order to prepare for <br />larger repair project we propose a plan to investigate the condition of the exposed cable while at the <br />same time providing a solution to the concerns about water penetration and future damage to the <br />cables, In accordance with this we propose to f imish all necessary labor, material, equipment and <br />supervision except as noted below to perform the following items of work: <br />1. Mobilize to job site <br />2. Layout repair areas 1-5 (as shown in attached photos 1-5). <br />3. Saw-cut approx %Z inch deep around patches. <br />4. Chip-out repair area to expose cables and provide keyway. <br />5. Inspect exposed cables for condition and tension. <br />6. Provide stamped engineers report on cable condition. <br />7. Re-seal damaged tendon sheathing per PTT specification (see image 6). <br />8. Prep concrete surface for topping. <br />9. Install high strength concrete repair material to provide min 1 inch cover for cables. <br />If deemed necessary from inspection of the cables and engineering analysis of the existing capacity of <br />the structure we also propose to re-tension existing broken cables as follows: <br />I. Locate quarter point of cable profile. <br />2. Expose cable at this point. <br />3. Install cable coupler per PTI specifications with splice of new cable length. <br />4. Using "Z" anchor, re-tension cable to required pressure within open slab location. <br />5. Using high strength concrete repair mortar pour back open patch. <br />ATLANTA. BALTIMORE • BATON ROUGE. BIRMINGHAM. CHICAGO -CINCINNATI. DALLAS -DENVER. DETROIT. FT LAUDERDALE . GREEN BAY. HARTFORD -HOUSTON <br />KANSAS CITY. LAKE CHARLES, LA. LOS ANGELES - NEW YORK. PHILADELPHIA. PHOENIX . PITTSBURGH - SALT LAKE CRY -WASHINGTON, OC. WEST FLORIDA <br />A Structural Group Company <br />8OA-24