Multipliers Tab
To review or modify the length and deflection multipliers, click the Multipliers tab on the Project Parameters (as the figure below).
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Deflection Multipliers
As specified in the PCI Design Handbook (Fifth Edition), long-term deflections for a prestressed beam are obtained by multiplying short-term deflections with specified factors. Precast/Prestressed Girder follows this same approach. Refer to the PCI Design Handbook (Fifth Edition) for a list of such factors for different loads.
- Length Multipliers
Length multipliers are used to calculate the development length and transfer lengths for bonded and debonded strands, where bonded strands are strands that have no debonding (not shielded).
- Transfer - Bonded
The calculated transfer length is multiplied by this number to obtain the transfer length for bonded strands.
- Transfer - Debonded
The calculated transfer length is multiplied by this number to obtain the transfer length for debonded strands.
- Development - Bonded
The calculated development length is multiplied by this number to obtain the development length for bonded strands. In the LRFD mode, as well as in the Standard Specifications mode, this factor has been set to 1.6.
- Development - Debonded
The calculated development length is multiplied by this number to obtain the development length for debonded strands