American Steel Design Codes AISC

This page contains a list of Wikis which are related to the American Steel Design codes (AISC ASD 9th Edition, AISC LRFD 3rd Edition. AISC Unified, AISI).

1. STAAD is checking deflection for beams or girders for all the load combinations in my model. Is there a way to tell STAAD which load combination to check?
2. The steel design output indicates a slenderness failure (KL/r exceeds allowable). Why? The axial force on the member is very small.
3. I set my deflection limit to L/360, but the maximum deflection indicated in the summary of node displacements in PostProcessing shows a deflection of 1.5 inches. Isn't this above the limit that I set?
4. THE VALUE OF E FOR MEMBER NNN DOES NOT SEEM RIGHT. What does this mean?
5. In the TRACK 2 output for the American LRFD code, I find some terms that I am not familiar with. Can you tell me what those are?
6. In the TRACK 2 output for the AISC ASD code, I find some terms that I am not familiar with. Can you tell me what those are?
7. I want STAAD.Pro to perform a steel design based on the LRFD 3rd Ed rather than the 2nd Edition. The output always says "LRFD 1994". How do I tell it what code to use?
8. I am not sure how STAAD deals with the specifications of the unsupported length for top flange compression.
9. I would like to perform code checking on a 8" x 2 1/2" x 10 Gage channel per the AISI Coldformed steel code. But this channel is not listed in the sections available in your database. Can I assign it using a user provided table?
10. Increasing the NSF value in Steel Design does not change the Failure Ratio for a member, Why?
11. I ran my STAAD model and got an error message which stated that "This version does not design prismatic sections". What does this mean?
12. The KL/ry reported for a double angle does not match my hand calculations. I am designing the section per the AISC ASD 9th edition code.
13. I am using the composite beam design capabilities. But the output does not show any evidence of this design. Why?
14. How does one change the value of the yield strength of steel?
15. In STAAD/Pro 2000 and STAAD.Pro, I no longer see the UNL parameter for the AISC ASD and LRFD codes. Instead, I see the parameters UNT and UNB. Why?
16. The steel design output for a tube section checked per the AISC ASD code indicates an SY and SZ substantially different from the values which are reported in the AISC publication. Why?
17. How can I check whether the story drift of the floors are within allowable limits?
18. Utilizing DFF in STAAD only helps one check the local deflection. What if I want to check the drift of a column / beam frame?
19. Can I get STAAD to check deflection in both axes?
20. Will STAAD explicitly state that the beam has passed the deflection criteria?
21. THIS VERSION DOES NOT DESIGN TAPERED POLE SECTIONS (MEMBER 1). What does this error message mean?
22. [[2 Similar Members One Passes, the Other Fails]]
23. What do the following parameters mean? NSF 0.85 ALL, BEAM 1.0 ALL, KY 1.2 ALL, RATIO 0.9 ALL, LY 18 ALL, LZ 18 ALL, CHECK CODE ALL
24. When one does the AISC code check or member selection, what are the calculations the program is performing?
25. I am using STAAD to perform steel design on a member per the AISC ASD code. I want the column to be designed based on an unbraced length of 20 ft. I have set the UNT and UNB values to 20 ft, but STAAD appears to consider only a 10 feet length in its KL/r calculations. How do I correct this problem?
26. I run the analysis of a 3-D bridge truss model and requested a CODE CHECK of the members. The results of this code check do not correspond to my hand calculation results.
27. What is the LX parameter used for?
28. The KL/r value that STAAD reports for a single angle member does not match my hand calculation. Design is per the AISC ASD 9th edition code.
29. What are the SSY and SSZ parameters for AISC ASD based steel design?
30. The KL/ry reported for a T shape does not match my hand calculations. I am designing the section per the AISC ASD 9th edition code.
31. In the output for steel design, what does the term "dff" represent?
32. In STAAD-III, I was able to get a steel design for members defined using the PRISMATIC property attribute per the AISC ASD code. I cannot do this in STAAD/Pro. Why?
33. In the context of design, what is meant by the term Ratio?
34. I have multiple sets of design in the same STAAD file and I am only able to see the results for the final set in the Postprocessing mode (GUI). How can I view the results for all design sets in the GUI ?
35. How is the shear stress calculated in STAAD.Pro for AISC design code ?
36. Do you have a plan that STAAD.Pro implements AISI 2016 edition?
37. A structure that I'm working on I have a 11.6m beam which supports transverse beams and bracing. How can I determine the overall deflection of the 11.6 m beam and check if it is complying with the L/500 criteria?
38. I have done a buckling analysis and can see the buckling factors. However when I attempt to do a steel design, all members fail. Why ?
39. What does the design parameter STIFF represent ?
40. While designing a few members as per AISC 9th edition code I am getting a message "THIS VERSION DOES NOT DESIGN PLATE GIRDER PER CHAPTER G WITH h/Tw > 970 / sqrt(FY)". What does the message mean ?
41. Axial Compression Capacity about Minor Axis Flexural Buckling for a I shaped Section having Slender Web and Non Slender Flange Per AISC 360-10 Code
42. Compression capacity of an I-shaped steel section having Non-Slender elements per AISC 360-10 code
43. Serviceability and strength check for the same load combination
44. Specifying ASD as the Design Method
45. Strength/Serviceability check in design
46. Different AISC steel design codes and commands to invoke each
    
47. Changing units for design as per AISC 360-10 code
48. [[Can I design non-American steel sections using the AISC design codes in STAAD.Pro ?]]
    
49. [[Tension Slenderness as per AISC 360-2016]]
50. [[Viewing results for multiple design parameter blocks]]
51. **WARNING- THE AXIAL COMPRESSIVE STRESS EXCEEDS THE EULER STRESS FOR MEMBER X EQN. AISC H1-1 CANNOT BE CHECKED PROPERLY
52. Automatic calculation of effective length factors Ky and Kz in STAAD.Pro
53. [[What does this warning mean? **WARNING- Castellated beam 7 has force/moment in FX, FZ, MX and My direction. It cannot be designed ]]
54. [[Explanation of IX in AISI section database]]