I realized today that I have been missing a check in my composite beam design. My text book "Structural Steel Design - ASD Method" (Jack McCormac, 4th ed.) specifies the following design criteria:
before concrete hardens
fs = Md / Ss < Fb
after concrete hardens
fs = Md / Ss + Ml / Str-bot <...
We have been using ETABS for a couple years - I find it to be a "buggy" program - I spend a lot of time messing with fixity at various points to get rid of errors, etc.
We had a RAM presentation yesterday - It seems to be an "easier" program to use - though I don't think it has the same...
I have been running several iterations of the same 10 story building throughout the life of this project. We have high windspeeds and (very) low earthquake forces. Until today, I have not considered the effects of earthquakes.
I have gone through a half dozen iterations of the model and...
From CFR 29 1910.66 Appendix C states:
"(2) The anchorage should be rigid, and should not have a deflection greater than .04 inches (1 mm) when a force of 2,250 pounds (10 kN) is applied."
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9730
How do you interpret...
The FAQ in the "Guide to the use of the wind load provisions of ASCE 7-12" (don't have the -05 one yet) recommends using roof overhang coefficients for balconies, which are essentially the same as canopies.
ASCE 7-05 appears to have added Figures 6-18(MWF) and 6-19(C&C) for "Free Roofs". Is a...
