Oh no! Cracked frame! - Fiberglass RV


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Old 07-12-2018, 05:00 PM   #1
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Name: Jennifer
Trailer: 1982 13' Scamp
AK
Posts: 19
Oh no! Cracked frame!

Noooooooooo! I just discovered that the frame on my 1982 Scamp is cracked. I'm guessing it is unsafe to tow the trailer at this point.

Is there any hope?
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Old 07-12-2018, 05:26 PM   #2
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Name: Charlie Y
Trailer: Escape 21 - Felicity
Oregon
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A good welding shop can patch a brace across that break. An even better option would be a shop that actually builds trailers.
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Old 07-12-2018, 05:29 PM   #3
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Name: Kevin
Trailer: 28' Bigfoot Silver Cloud
Woodstock, IL
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Maybe do both frame pieces (left and right) just to be safe!
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Old 07-12-2018, 07:31 PM   #4
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Name: K C
Trailer: 1971 Trailswest Campster
Washington
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unsafe to tow? yes


Can it be repaired, yes but if you do so you might want to have some extra angle iron pieces welded to the frame that would start at the tongue and extend past that vulnerable bend in the tube. One piece for each side. Those pieces can then share the loads on the structure and transfer some of work loads on past those bends in the frame. Gussets help but more struts will too. The angle iron is not a budget breaker and you are already having it welded so the extra labor cost won't be a huge hit either.


Does it need to be replaced with a new frame? ....have the entire frame inspected, hopefully by a professional. They will give you a report of the condition along with a sketch of areas of concern. Then get an estimate for repairs and an estimate for a new trailer frame.
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Old 07-12-2018, 07:56 PM   #5
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Name: Steve
Trailer: Scamp 13
California
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Weld it up and add fish plates over the weld. I would reinforce the other side too. When this side broke all the stress went to the other side and overloaded it so stress failure is on its way there too. Both sides went on the same trip so reinforce it now.

https://www.google.com/search?q=weld...gqaYxuvdPwGOM:
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Old 07-13-2018, 10:14 AM   #6
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Name: William
Trailer: 13' Perris Pacer
California
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Yes, it can be repaired. See how Bex the Cat Herder took care of it...in the middle of the street! She was at the right place at the right time. Here's the video, but skip to the 5:00 minute mark.

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Old 07-13-2018, 03:25 PM   #7
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Name: Jennifer
Trailer: 1982 13' Scamp
AK
Posts: 19
Thank you all! Can it be safely welded/patched being that close to the wooden floor?
(I clearly know nothing about welding.)
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Old 07-13-2018, 04:38 PM   #8
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Name: Karl
Trailer: Trillium 1300
Alberta
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Yes I have the same problem on my Trillium 1300.
I’m replacing the whole frame as I think this is at the end of its life.
I removed four of the six bolts but cannot find the last two!!! Got the four corner ones, they are easy to spot but where are the other ones??? And are they the same type of bolts????
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Old 07-13-2018, 04:57 PM   #9
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Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
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I can almost guarantee there are cracks on the other side where the sideways tubes are welded to the front part of the frame.
Rusty steel is hard to weld so get someone good to do it.
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Old 07-14-2018, 05:45 AM   #10
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Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
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The second picture shows the problem with just reweldind the cracks as the frame has broken the second time at the edge of the previous weld.
The thickness caused a stress concentration and the heat affected zone was also weaker.
This is why the reinforcement plates must be tapered over a fairly Long area.
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Old 07-14-2018, 10:44 AM   #11
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Trailer: Trillium 1300
Alberta
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Thanks for the information. I didn’t realize the welded plates where too short. I see this now. If I would have done this the welded reinforcement would have been sustancially longer to extend past the bends on the frame.
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Old 07-14-2018, 11:21 AM   #12
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Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
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You might want to add 1" angle iron bent to fit the curve along the bottom of both sides (s) and extending well past the fish plates. The ends should be tapered > < where the ends are not on the square edges to avoid building another stress riser.
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Old 07-18-2018, 10:54 AM   #13
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Name: Ron
Trailer: Compact Jr
TX
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Oh no! Cracked frame!

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The frame on my Compact Jr was broken and poorly repaired before i got it. I knew it would be a total rebuild project, but bought it anyway.

once i pulled the body off the frame, i was amazed how poorly it was built.



I am building a new one out of 2x2 11 gage for the main frame and 3x3 11 gage for the tongue.



I have build a few adventure type trailers and a few utility trailers with this methodology and they have held up very well.
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Old 07-18-2018, 11:40 AM   #14
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Trailer: Miti Lite 1987
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Originally Posted by tractors1 View Post
A good welding shop can patch a brace across that break. An even better option would be a shop that actually builds trailers.
I second that opinion.
My 87 Mity-Lite developed a frame crack where the tongue joins the body section while we were on vacation, so I looked up a blacksmith type welding shop and inside one hour they had formed and welded 2 braces, one for each side, and that weak spot is now several times stronger than original. I was concerned for the fg body at the weld sites, but they heat sinked the areas resulting in no effect. We were in Utah farm country at the time, and I expected a repair bill of several hundred dollars for the instant service. I was floored when the bill for materials and welding came to a mere $30. That's the Mormons for ya! Of course, YMMV.
BTW, that crack is safe enough for unloaded gentle towing, even some 30-50 miles
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