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07-02-2020, 11:30 PM
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#1
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Senior Member
Trailer: 1986 Boler 1300 Voyager
Posts: 723
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Welding Fish plates on Frame
Does anyone know where or could suggest where fish plates should be welded onto the frame to add a bit more strength before it gets repainted?
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07-03-2020, 05:30 AM
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#2
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Senior Member
Trailer: 1986 Boler 1300 Voyager
Posts: 723
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Quote:
Originally Posted by Markz
Does anyone know where or could suggest where fish plates should be welded onto the frame to add a bit more strength before it gets repainted?
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Can frame supports be welded on with the body still attached?
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07-03-2020, 10:01 AM
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#3
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Senior Member
Name: Bob
Trailer: Boler 1300
British Columbia
Posts: 204
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Here's a pic of where we put the fish plates on my 73 boler. And by we of course I mean my son the welder
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07-03-2020, 11:27 AM
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#4
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Senior Member
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,310
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What is a fish plate? What is it’s purpose?
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
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07-03-2020, 11:33 AM
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#5
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Senior Member
Name: Mike
Trailer: Escape 21 & Jeep GC 5.7 (Previous 2012 Casita FD17 & 2010 Audi Q5)
Puget Sound, WA
Posts: 1,775
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Quote:
Originally Posted by Rzrbrn
What is a fish plate? What is it’s purpose?
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Fish plates are used for repair or strengthening frames. The tapered ends reduce stress concentrations, so the frame won't tend to tear at the ends of the plate.
__________________
~ “It’s absurd to divide people into good and bad. People are either charming or tedious.” Oscar Wilde ~
~ “What the human being is best at doing is interpreting all new information so that their prior conclusions remain intact.” Warren Buffett ~
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07-03-2020, 11:35 AM
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#6
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Senior Member
Name: Henry
Trailer: BigFoot
Tennessee
Posts: 1,310
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Thank you for explaining.
__________________
2019 Big Foot 25RQ with cargo box, onboard Cummins LP 2500 generator, solar panels, and 2019 Ram 2500 4x4, 6.7L Cummins with ARE Shell.
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07-03-2020, 12:51 PM
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#7
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Senior Member
Name: John
Trailer: 1979 Boler 1700
Michigan
Posts: 2,048
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Mark, the fish plates on my Trillium 4500 were applied to the frame rails on the sides of the bends that were made to form the tongue.
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07-03-2020, 02:28 PM
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#8
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Senior Member
Trailer: 1986 Boler 1300 Voyager
Posts: 723
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Quote:
Originally Posted by John in Michigan
Mark, the fish plates on my Trillium 4500 were applied to the frame rails on the sides of the bends that were made to form the tongue.
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Do you have pictures? Were they welded on with the body attached?
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07-03-2020, 02:28 PM
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#9
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Senior Member
Trailer: 1986 Boler 1300 Voyager
Posts: 723
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Quote:
Originally Posted by bobdobqb
Here's a pic of where we put the fish plates on my 73 boler. And by we of course I mean my son the welder
Attachment 135784
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Thank you, Nice work!
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07-03-2020, 03:06 PM
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#10
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Senior Member
Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 2,445
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Take a look at that frame and notice the "missing" structure where the door on the left side interrupts the frame. This is one area that needs reinforcement as there is a lot of flex here and that twist caused the frame problems in the bends on both sides and where they tie into the structure.
If it were mine I would also box in the already caves in sections on the inside of those bends as the tube has already failed there or they would still be straight.
Depending on what you are planning under the floor I would also install a cross beam from the newly boxed bends to each other.
By the way the idea of a fish plate would include a longer taper and a sideways vee instead of the rounded plate ends as they still will tend to concentrate the stress in the end of that circle. Best would be a Vee with the weld extended an incl or so past the end of the plate.
For the door frame area I would put two 1 1/2" X 2" tubes flat across the opening and extend them far enough to transfer the load to the front and rear with bracing to also reinforce that connection as this is also an area that cracking takes place.
I added the tubing and a bracket on my 16' Scamp. Here is a picture of the doubled cross member and the bracket forward of the door.
The view of the other side with the added section under the frame forward of the door. The extra 1 1/2" square tube is the end of the structure added for the front bathroom
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07-03-2020, 03:21 PM
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#11
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Senior Member
Name: Dave
Trailer: 2013Escape 21
Iowa
Posts: 1,208
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Yes. A competent welder will clamp the fish plate, angle bracket or whatever is to be attached. It will not
Be touching the fiberglass or wood or other combustibles . It’s usually clamped at the maximum distance from the body , low on the frame. When we used to do work like this we would get a bath towel out of the lost and never found and get it soaking wet. The welder would tack the plate in about three places and stop to make sure it was where it needed to be. He usually worked with a helper. So the welder would run some bead and stop. The helper would jab the wet towel on the weld and surrounding area. To cool it off while teasing the welder with “we’re on farr, we’re on Farr. They would look at the weld, maybe hit it a couple times with the slag hammer, then go again till the plate was attached. The curved nature of the plate allowed some weld on the top edge without getting too close to the combustible or meltable areas. The weld bead does not have to go all the way around the plate. Think northern pike not Sunfish first shape. That’s my experience over the years.
My brother was certified to weld 4 inches thick material on cranes and dozers being bought by the Navy during Nam. He knew his stuff. Now he just tacks cheap Chinese built mowers together when the wheels fall off for my kids. But he’s still elegant about it and shows pride in his work. Safety and planning first, execution second, cleanup and paint third, then beer. YMMV
Iowa Dave
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07-03-2020, 03:51 PM
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#12
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Senior Member
Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 2,445
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Beer! Did somebody say BEER?
Keep a lookout for FAR especially if you are near the polyester fiberglass!
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07-03-2020, 04:08 PM
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#13
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Senior Member
Name: Carl
Trailer: LiL Hauley
Syracuse, NY
Posts: 656
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If you have a far you can put it out with water or beer. Here is the difference in the sound of water and beer.
__________________
Your heirs will inherit money and stuff when you are gone. You can only save or spend money, but you can do things with stuff, so they are going to inherit stuff!
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07-03-2020, 04:59 PM
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#14
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Senior Member
Name: Alexander
Trailer: 1979 Boler B1300
New Hampshire
Posts: 1,140
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That was a Heineken! Shouldn't it have played something more Germanic? Like tis:
That music sounded more like Corona to me.
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07-03-2020, 05:06 PM
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#15
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Senior Member
Name: John
Trailer: 1979 Boler 1700
Michigan
Posts: 2,048
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Quote:
Originally Posted by Markz
Do you have pictures? Were they welded on with the body attached?
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Mark, here is a pic of the fish plate on my Trillium 4500. Its at least 18" long. It was applied long before I bought the trailer, probably early on, so I don't know if it was done with the body on the frame.
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07-03-2020, 05:12 PM
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#16
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Senior Member
Name: John
Trailer: 1979 Boler 1700
Michigan
Posts: 2,048
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Each FGRV brand and model is different in terms where weaknesses might be on the frame. For insight into how the Boler 13 frame might need reinforcement, see the "Custom Frame & Axle" section in Ian Giles' write up in the attached link.
https://www.proud-canadian.com/13-bo...eyond-1/boler/
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07-08-2020, 11:10 AM
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#17
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Junior Member
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Our 74 Boler had 3 separate repairs to the frame before we had Metro Trailer in Winnipeg install one of their units. Your trailer will probably need a new axle/suspension if you haven't changed it yet. The frame and axle, installed at Metro will be $3000-$3500 but they use heavier gauge steel than the original and they have it galvanized. We are very pleased with the end result and the peace of mind knowing we won't be stranded is a comfort as well.
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