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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|kb:Tendon] must be modeled as elements for the flexural design check.

Users should create load combinations 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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