greencircle
Mechanical
- Nov 19, 2014
- 88
In another post I had discussed about induction heat treatment for aluminum street light poles to retemper T0 - T6 at the HAZ. I learnt that this is not possible by localised induction heat treatment. We will have to use a huge oven to solution heat treat the entire pole which is an expensive setup & handling. This even more expensive when we dont have an inhouse heattreatment facility & have to be sent out.
Alternatively I am thinking of welding a cast base to a ~3ft taper pole. Now the the overall height of the weldment is not taller than 5ft. Which makes its easier to solution harden to T6. After heat treatment I want to lap-joint the tall pole to this short base. something like this :
I have seen some street light poles that have this kind Lap Joint connection & have a trough bolt & nut at the joint.
I have got this image by googling. But in aashto code, I don't see any formula for calculating minimum overlap.
Can any one see any drawback in this method?
Alternatively I am thinking of welding a cast base to a ~3ft taper pole. Now the the overall height of the weldment is not taller than 5ft. Which makes its easier to solution harden to T6. After heat treatment I want to lap-joint the tall pole to this short base. something like this :
I have seen some street light poles that have this kind Lap Joint connection & have a trough bolt & nut at the joint.
I have got this image by googling. But in aashto code, I don't see any formula for calculating minimum overlap.
Can any one see any drawback in this method?