Aluminum Design Manual ?
Aluminum Design Manual ?
(OP)
I am working on my first Aluminum structure....thankfully it's only a small carport. My question is in regards to the Allowable Stress Tables in Part VI of the Aluminum Design Manual (Tables 2-1 thru 2-24). There are tables for "welded" and "unwelded," but I'm having trouble understanding what that means. Is that a fabrication item to where if I were to be using a built-up section then I would use the "welded" tables, or if does that mean if you are welding at all to the member then you must use the "welded" tables. Thanks for the help.






RE: Aluminum Design Manual ?
RE: Aluminum Design Manual ?
RE: Aluminum Design Manual ?
RE: Aluminum Design Manual ?
RE: Aluminum Design Manual ?
Metallurgically, the result of welding on aluminum is not predictable by heat alone. One reason for this is that for most structural alloys of aluminum, part of the strength is gained by ambient temperature ageing, after controlled thermal input for tempering. If the thermal input is not controlled (e.g., welding) then the tempering is not controlled and the aged strength gain is unpredictable. For these reasons, the allowable stresses are reduced within 1 inch of the weld to accommodate the unpredictable strengths.