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Design Rationale: Structure
721.2.2
Deep Truss
Pro:
1. Allows longest clear spans (fewer columns).
2. Service zone can be deep enough for horizontal access.
Con:
1. Uneconomic at shorter spans. More costly than beams at medium-
range spans as well. Long spans, where truss is most applicable, are
not considered necessary.
2. Truss depth controlled by depth required for service distribution (or vice
versa).
3. Truss diagonals impose severe restrictions on service distribution and
access, especially with fireproofing. Less inhibiting Vierendeel truss is
inefficient
4. Truss solution weights system toward steel, ignoring regional
differences which may favor concrete.
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