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Old 06-06-2013, 05:49 PM
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49-54 Chevy floor construction

I am puzzled by how GM designed the rocker boxes for the '53 Chevy I am working on. The bottom of the assembly is a pinch weld like all common vehicles but the top of the inner rocker is flanged toward the center of the car. The outer rocker stops short of reaching the inner rocker by about 3/16 of an inch. When the floor pan assembly is install it is extends past the inner rocker to the outer rocker and is spot welded to both. That is what completes the box.

Question: If I build my floorpans to reach the inner rockers are the replacement outer rockers goint to be long enough to reach the inners? It may be wise for me to order the outer rockers and build my inner rockers and floor pans from them. The inner rocker position is criticle to the pinch weld being in the right place anyway.

Any old body men that are knowledgeable about this?


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Old 06-06-2013, 09:55 PM
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John, I'm not sure if my experience is true for your car but on my '66 Chevelle, the floor pan sits under the lip of the outer rocker and the inner rocker then sandwiches the floor pan from beneath. The outer and inner rockers only touch at the bottom pinchweld area.

Your pic almost looks like the floor pan sits on top of the outer rocker lip but the inner still comes up from beneath and supports the floor pan by turning to the inside. In any case, the floor pan needs to be wide enough to weld to the outer rocker.

I found a pic of the 3 layers I was trying to explain..


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Old 06-06-2013, 10:18 PM
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Quote:
Originally Posted by Too Many Projects View Post
John, I'm not sure if my experience is true for your car but on my '66 Chevelle, the floor pan sits under the lip of the outer rocker and the inner rocker then sandwiches the floor pan from beneath. The outer and inner rockers only touch at the bottom pinchweld area.

Your pic almost looks like the floor pan sits on top of the outer rocker lip but the inner still comes up from beneath and supports the floor pan by turning to the inside. In any case, the floor pan needs to be wide enough to weld to the outer rocker.

I found a pic of the 3 layers I was trying to explain..
Great PIC thanks. The way you interpreted my pictures exactly the way it is. The inner and outer rockers do not touch at the top. They are joined by the floor pans that weld to the top of both.

When I build my inner rockers I am going to built them similar to yours. I went ahead and ordered outer rockers from EMS today. I need to start from the outside and work toward the center. It is imperative that the outer rockers fit the bottom of the doors.

Thanks for the input.

John
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Old 06-06-2013, 10:24 PM
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Having a complete outer rocker will show how it extends under the front A pillar and is an integral part of that whole assembly. It will probably be easier to visualize the rest of the fabrication with the rocker to look at.
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Old 06-06-2013, 10:32 PM
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Originally Posted by Too Many Projects View Post
Having a complete outer rocker will show how it extends under the front A pillar and is an integral part of that whole assembly. It will probably be easier to visualize the rest of the fabrication with the rocker to look at.
I understand exactly how they did it TMP. For the life of me I just don't see why.
I am going to build it back like a late model. I may have to weld a outer lip on the inner rocker to keep it plum. It will depend on how far the top of the outer rocker comes in. Will know in a few days.

John
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Old 06-07-2013, 05:13 AM
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Getting the replacement rockers in front of you will give you a much better idea.

And TMP, that is a great photo with the illustrations, I have a hard time doing that and it adds so much! It explains it perfectly in one quick look. How did you add your explanation written on the photo? I can't figure out the new Photo Bucket, it use to be so easy.

Brian
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Old 06-07-2013, 05:27 AM
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Originally Posted by MARTINSR View Post
Getting the replacement rockers in front of you will give you a much better idea.

And TMP, that is a great photo with the illustrations, I have a hard time doing that and it adds so much! It explains it perfectly in one quick look. How did you add your explanation written on the photo? I can't figure out the new Photo Bucket, it use to be so easy.

Brian
Amen to the Photobucket. I use an IPAD which is a MAC system and there is no way I can post a thumbnail anymore. If I try it links back to my entire album. The new Photobucket updates just stink.

tMO's picture was perfect wasn't it? Thanks again TMP.
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Old 06-07-2013, 05:45 AM
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I would really like to know why they would change the Photo Bucket so much? What in the living hell would make them do that? I have tried to contact them to ask questions and the whole thing just SUCKS.


Brian
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Old 06-07-2013, 05:52 AM
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That pretty well sums it up.
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Old 06-08-2013, 08:02 PM
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Quote:
Originally Posted by MARTINSR View Post
Getting the replacement rockers in front of you will give you a much better idea.

And TMP, that is a great photo with the illustrations, I have a hard time doing that and it adds so much! It explains it perfectly in one quick look. How did you add your explanation written on the photo? I can't figure out the new Photo Bucket, it use to be so easy.

Brian
I made the alteration from the pic on my computer in "paint' and then saved it as a new image and uploaded to photobucket. I have no clue how to use any of the features in Photobucket. Paint is really cool, once you learn how to use it, for making arrows, notations and such and then save it as new pic. I erase my license plate numbers in paint before posting most of the time too.
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Old 06-08-2013, 08:05 PM
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I don't have Paint on this computer. Maybe I'll look into that.

Brian
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