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Section 5
5-75
5.20.2.1 Prismatic Tapered Tube Property
Specification
Purpose
The following commands are used to specify section properties for
prismatic tapered tube cross-sections. For the property types
shown below, additional information can be obtained from Table
2.1 of the ASCE 72 document, 2nd edition.
General format:
*
⎧
ROU
ND ⎫
⎪
HEXDECAGONAL
⎪
property-spec =
⎨
DODECAGONAL
⎬ START d
1
END d
2
THICK t
⎪
OCTAGONAL ⎪
⎪
HEXAGONAL ⎪
⎩
SQUARE ⎭
START d
1
= Depth of section at start of member.
END d
2
= Depth of section at end of member.
THICK t = Thickness of section (constant throughout the
member length).
Example
UNIT . . .
MEMBER PROPERTY
1 PRIS ROUND STA 10 END 8 THI 0.375
2 PRIS HDC STA 15 END 10 THI 0.375
3 PRIS DOD STA 12 END 12 THI 0.375