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h1. Handling of hyperstatic moments

The flexural design check for prestressed-concrete box-girder bridge superstructures fully accounts for secondary effects from [prestress-tendon|kb:Tendon] forces. Primary prestress forces are removed and demands automatically include secondary forces. Hyperstatic [load cases|kb:Load case] need not be included in design combinations. Tendons must be modeled as elements for the flexural design check.

Users should create [load combinations|kb:Load combination] with prestress loading. Primary forces are calculated through subtraction of tendon force from demand. Additional concrete forces are either secondary or imposed.

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* [t:Hyperstatic analysis]
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