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Personally I prefer RAM (including RAM frame) for all structural steel buildings. Very user friendly and the interface between gravity design and lateral analysis continues to get better and better. RAM allows you to import a column grid from an AutoCAD file (although sometimes finiky) or you...

When you say metal roofing...what kind of product are you referring too? Standing seam or 9/16" corrugated 20ga roof deck? Typically a standing seam roof isn’t used as a diaphragm (if it can be avoided). However, if you are designing a barn with a good diaphragm aspect ratio, I believe almost...

I typically use properties found in NCMA TEK 14-1A (issued 2003). It breaks down the properties for both Average cross-section (stiffness) and Net cross-section (stress calculations).

Does anyone have a good reference for steel cables? I am trying to track down properties for 7x9 1/4" cable.

Unfortunately, AISC isn't overly clear on the subject matter of built-up columns (at least not in the ASD manual). the commentary says "Requirements for detailing of built-up members, which cannot be stated in terms of calculated stress, are based upon judgement, tempered by experience". Plus...

Using a k=1.0 for each individual member I would need banding at 2'-0" increments...which maybe the way to go. However, if the banding is a collector for the buckling forces of the compression members...how are these forces resolved? do you think they are just resolved internally because they...

jopalu, IBC 2000 Section 1607.13. The 5psf of internal pressure is treated as a live load.

Here's a structure type you don't see everyday...for good reason. Brief Description: I am looking to analyize a "stand-alone" column structure (k=2.0) built up of a series of 18--1" dia. rods. in a circular footprint. The column tapers as it gets taller. The structure will be "banded"...

I am not sure which version of Staad you may be using, however: In the graphical interface: 1. Click the design Tab 2. Pick AISC design code 3. Click Define Paramaters 4. In this portion you can define a variety of parameters (ie. KZ, KY, unbraced lengths...) 5. After you have assigned the...