welded connections for aluminum

huangyhg

welded connections for aluminum
i am having trouble coming up with allowable stresses for welds in aluminum connections.  i have the 2000 aluminum design manual, but there is no information in there regarding welded connection allowable stresses (unless i am missing something), only welded built-up members.  i know the member changes allowable stresses if it within an inch of the weld, but i can't find anything on the weld itself.
does anyone have any information on this topic or can you steer me in the right direction?
you can see the thing discussed with examples in
aluminum structures
a guide to their specifications and design
j. randolph kissell and robert l. ferry
wiley interscience, john wiley and sons 1995
also check out aluminum design manual: specification for aluminum structures by the aluminum association.
what you may be looking for is "structural welding code-aluminum" , aws, d1.2-97:
try this link for any welding code or standard.
erv:
the d1.2 codes' section on design is minimal, about 3 pages. the reference i noted above is noted in the d1.2 code in section 2 - design of welded connections.   
if you weld aluminum, you basically need to use the properties of annealed aluminum in the vincinity of the weld.
what alloy and rod are you using?  ill look it up for you.
cheers
broekie,
it is in the 2000 aluminum design manual.  sorry, i'm at home so i don't have the adm handy.  if i remember next week when i'm at work i'll tell you the section.  (in other words your out of luck.)
i think i've seen you post several questions about aluminum so i assume your new to its design.  let me give you some advice on aluminum welding . . . don't.  just kidding, but seriously, where i work we avoid welding critical   
broekie...the info you're looking for is contained in table 3.3-2 of the 2000 adm.  it varies with alloy.  the stress reduction applies to an area within 1 inch of the weld.  note that there are several little nuances of the allowable stress application for welds as noted in section 7 of part 1a of the 2000 adm, such as for sections with weld on part of the cross section, etc.
good luck.
for two common alloys, 6061-t6 and 6063-t6, the allowables are 15 and 11 ksi respectively, but again, you should check the provisions for applicability, as thickness, proximity, and other issues may prevail.
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\always re  
what is 2000 adm?