Plese be aware of the naming convention used to differentiate the uneven leg double-angles. The flexural torsional buckling following the LRFD's Appendix E3 has been implemented in StlShape since March 98. Tube wall thickness in our ASD and LRFD manuals are not longer valid. The Steel Tube Institute of North America and AISC have issued a new tube properties booklet using the suggested modified wall thickness representing 93 percent of the nominal wall thickness. StlShape uses HSS s design properties.
Steel design covers bending, compression and combined stresses.
Structural steel frames are important elements used to resist earthquake forces in California and the adjacent states. Uniform Building Code has special provisions for Concentric Braced Frame and Special Concentric Braced Frame for framing members. Six different entries for compression members design using steel are grouped under the 'Design' menu. For reinforced concrete, you can start the reinforced concrete beams and rectangular tie columns under the 'Design' menu directly. Material and sizes are specified in the design dialog box.