ADT
Structural
- Oct 16, 2000
- 25
I frequently see steel-framed buildings using light-gauge (viz. purlin type section) frames, having welded connections at the maximum moment points, ie. knee (column to rafter) and apex of a hipped roof.
It's my understanding that the heat of welding generally speaking destroys the high tensile capacity of steel. So to have a welded connection at maximum load points is a serious contradiction.
Am I missing something? Are there valid weld methods (lower temp; inert gas protection etc etc) which address this? How should one specify such weld procedures, which will frequently be on site?
Please, you mechanical types, help put this ignorant civil & structural engineer straight
Anthony Tugwell
Project Director & Consulting Engineer - now in Australia
It's my understanding that the heat of welding generally speaking destroys the high tensile capacity of steel. So to have a welded connection at maximum load points is a serious contradiction.
Am I missing something? Are there valid weld methods (lower temp; inert gas protection etc etc) which address this? How should one specify such weld procedures, which will frequently be on site?
Please, you mechanical types, help put this ignorant civil & structural engineer straight
Anthony Tugwell
Project Director & Consulting Engineer - now in Australia