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Old 05-21-2019, 12:01 PM   #1
Mini-Skoolie
 
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Roof raise amtran

planning on doing the roof raise soon.
Adding a transition from the very front slanting up to the 2nd rib.
I知 thinking of going with 18 gauge sheet metal. Probably just stainless steel or either galvanized .
Also I wanted to tack weld from the inside instead of riveting now. If possible. . I just don稚 get how the laps would look .
Well I heard the ribs of amtrans are 14 gauge. Now I知 wondering what the hat channel is? 14 also or 16 ?
Or even 18?
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Old 05-21-2019, 12:07 PM   #2
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Originally Posted by BusT View Post
planning on doing the roof raise soon.
Adding a transition from the very front slanting up to the 2nd rib.
I知 thinking of going with 18 gauge sheet metal. Probably just stainless steel or either galvanized .
Also I wanted to tack weld from the inside instead of riveting now. If possible. . I just don稚 get how the laps would look .
Well I heard the ribs of amtrans are 14 gauge. Now I知 wondering what the hat channel is? 14 also or 16 ?
Or even 18?
The hat channel IS the rib.
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Old 05-21-2019, 12:11 PM   #3
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Originally Posted by EastCoastCB View Post
The hat channel IS the rib.


BusT- What are you referring to as hat channels?
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Old 05-21-2019, 01:35 PM   #4
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Quote:
Originally Posted by BusT View Post
planning on doing the roof raise soon.
Adding a transition from the very front slanting up to the 2nd rib.
I’m thinking of going with 18 gauge sheet metal. Probably just stainless steel or either galvanized .
Also I wanted to tack weld from the inside instead of riveting now. If possible. . I just don’t get how the laps would look .
Well I heard the ribs of amtrans are 14 gauge. Now I’m wondering what the hat channel is? 14 also or 16 ?
Or even 18?
welding the hat channel to the skin from the inside will create an exterior striped surface at each weld line that attracts rust and will require extra sanding, filling and prep before painting - something to think about
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Old 05-21-2019, 01:40 PM   #5
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Quote:
Originally Posted by BusT View Post
planning on doing the roof raise soon.
Adding a transition from the very front slanting up to the 2nd rib.
I知 thinking of going with 18 gauge sheet metal. Probably just stainless steel or either galvanized .
Also I wanted to tack weld from the inside instead of riveting now. If possible. . I just don稚 get how the laps would look .
Well I heard the ribs of amtrans are 14 gauge. Now I知 wondering what the hat channel is? 14 also or 16 ?
Or even 18?
welding the hat channel to the skin from the inside will create an exterior striped surface at each weld line that attracts rust and will require extra sanding, filling and prep before painting - something to think about
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File Type: jpg bus bluebird raise 1.JPG (253.1 KB, 23 views)
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Old 05-21-2019, 07:00 PM   #6
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Man I thought the ribs were the square tubing underneath the ceiling . I guess that makes sense. Wel I 2nd guessed myself and thought that by cb saying ribs it could be that.

.....
Well check out this one done. Looks clean the picture is small but my bus is the same length and I知 thinking about that front piece transition and how good it looks.

So also this should help the aerodynamics correct? Most 18 wheelers have that front scoop.
I heard the other day people
Saying most of the drag is cussed from the back and doing it like this wouldn稚 help mpg at all?
It would just be a bonus to me if so because I知 already pretty committed.
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Old 05-21-2019, 07:08 PM   #7
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Couldn’t I just prime those spots after welding to help out on the no rust build
Up?
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Old 05-21-2019, 07:09 PM   #8
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Originally Posted by o1marc View Post


BusT- What are you referring to as hat channels?
I call hat channel hat channel.....

But calling them ribs is ����
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Old 05-21-2019, 07:13 PM   #9
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Old 05-21-2019, 07:30 PM   #10
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Quote:
Originally Posted by BusT View Post
Man I thought the ribs were the square tubing underneath the ceiling . I guess that makes sense. Wel I 2nd guessed myself and thought that by cb saying ribs it could be that.

.....
Well check out this one done. Looks clean the picture is small but my bus is the same length and I知 thinking about that front piece transition and how good it looks.

So also this should help the aerodynamics correct? Most 18 wheelers have that front scoop.
I heard the other day people
Saying most of the drag is cussed from the back and doing it like this wouldn稚 help mpg at all?
It would just be a bonus to me if so because I知 already pretty committed.
That's the style of transition I did.
I just like the looks better.
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