What's This Report For? Part 3: Floor Flatness and Stressing Reports-The Stressing Report-What the designer needs to know (PDF)

The Stressing Report-What the designer needs to know (PDF)

Pdf Summary

The article "The Stressing Report—What the Designer Needs to Know" by Jim Rogers provides an overview of the essential components and procedures related to the stressing report required in post-tensioned concrete construction. According to the International Building Code (IBC) and standards such as ACI 318-08 and ACI 301-05, the stressing report is a critical part of construction that verifies the application of prestressing forces through continuous special inspection. This report documents each tendon installed, including the stressing operations performed, elongations, and jacking forces, which should not deviate more than 7% from calculated values unless otherwise specified.<br /><br />The article stresses the importance of timely review by the licensed design professional in charge. Proper protocols demand that exposed tendon tails and unpatched pockets remain untreated until elongations are verified. If discrepancies arise, such as missing, broken, or improperly stressed tendons, corrective actions can involve replacing tendons or reevaluating forces if tendons appear overstressed or understressed.<br /><br />The report should include basic job details such as personnel involved, site conditions, and specific measurements for each tendon. Challenges like missing tendons, understressed tendons, or overstressed tendons are addressed, with solutions including tendon replacement or analysis adjustments without exceeding the specified jacking force due to risks of injury or structural damage.<br /><br />Lastly, timely evaluation of the stressing report ensures field operations are not delayed and highlights potential areas needing improvement in subsequent placements. Jim Rogers emphasizes the importance of these reports in maintaining quality and safety in post-tensioned concrete construction, drawing on his extensive experience and involvement in various ACI committees.

Keywords

stressing report

post-tensioned concrete

prestressing forces

ACI 318-08

ACI 301-05

tendon elongations

jacking forces

design professional

construction safety

Jim Rogers