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Section 2
2-21
member rather than as a regular frame member with both ends
pinned.
2.8 Unsymmetric Sections
For unsymmetric sections like single angles, STAAD considers the
smaller section modulus for calculating bending stresses.
For single angles, the “specification for allowable stress design of
single-angle members”, explained in pages 5-309 to 5-314 of the
AISC-ASD 9
th
edition manual has been incorporated.
2.9 Composite Beam Design as per AISC-ASD
In section 1.7.7 of this manual, two methods of specifying the
properties of a beam as a composite section (I-shaped beam with
concrete slab on top) are described. Those members can be
designed as composite beams in accordance with the AISC ASD
code provisions. If the properties are assigned using the explicit
method as defined in section 1.7.7, the design parameters
described in Table 2.2 later in this section have to be separately
assigned. The CMP parameter in particular must be set a value of
1.0 or 2.0. If the properties are derived from the composite decks,
the design parameters are automatically generated during the deck
creation phase, and hence no separate parameters listed in Table
2.2 have to be assigned.