Tilt-up wall panel design (ACI318): How is maximum moment calculated during lifting?

Tekla Tedds
2021
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2020
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2019
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2018
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2022
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2023
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maximum
tilt
wall panel
lifting
Environment
USA

Explanation

As the wall is tilted, the direct bending moment due to the self weight of the panel decreases because the effective span will decrease. However, as the wall is tilted the axial compression in the wall due to its self weight increases from zero (when at zero degrees) to a maximum (when at 90 degrees). As tilt-up wall panels are generally very slender, the additional bending moments caused by the combination of the panel deflection due to self weight bending and the axial compression have to be considered with the total moment being equal to the direct bending moment plus the additional moment due to deflection/compression. The panel only deflects due to direct bending away from the support positions hence it is only the positive bending moments that are affected.

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