Easy. AISC specification 2005 commentary: table J2.4 provides min. size of fillet ... Not based on strength considerations, but on the quench effect of thick metal on small welds. Very rapid cooling of weld metal may result in a loss of ductility.
I also design a lot of platforms for industrial use at my firm. The key to platform design is watching your deflections. The 100psf live load generally makes deflection govern over strength. The problem becomes clear when you walk across platforms designed for strength only- it's like walking...
Thank you for the replies. Im talking about structures such as HVAC equipment, penthouses, and the such that require their own structural analysis for wind effects- not their effect on the supporting structure. For tall buildings in ASCE 7-10 (nothing in 05), these structures have specific...
Hey,
Thanks in advance for the help. Is uplift insignificant for rooftop structures greater than 60 ft? ASCE 7-10 requires uplift forces of 1.5x the lateral wind pressure applied as an uplift force on rooftop structures for buildings less than 60 ft, but does not require the uplift for rooftop...
The issue has been raised before. Search for all welded shear tab or the like on this site for the discussion. The conclusion was AISC doesn't detail it out in the manual because of the difficulty of the shear tab obtaining the require flexibility for a simple support.