View Full Version : tongue figuring.
07-13-2011, 09:18 PM
need to know how to figure the A frame tongue to make a trailer pull streight down the road. any suggestions on how to figure it out? the trailer is a 5wide and it will be bolted with Grade 8 Bolts so no worries. they have a 150,000 tensile strength PSI or w/e
07-13-2011, 11:41 PM
It depends on HOW the bolts run. If you're talking about loading them in tension, impact wrench them and be on your merry way. However, since bolts are rated in tension only, you will need to take special precaution if you load them in shear.
07-13-2011, 11:59 PM
ok. gotcha now for the tongue?
07-14-2011, 12:21 AM
This is Bgbkwndo, calling from Kamloops, B.C., Canada. In one of my previous careers, I managed a trailer manufacturing facility, building "B" train wood chip trailers. When it came time to install the axles to the chassis, the fabricator placed a wire loop around the "fifth wheel pin" and from this, hooked a 50' tape measure to it. The axles and mounting hardware were clamped to the chassis, and when the measurement from the "pin" to a common spot on the left side of the axle, matched the measurement to the right side of the axle, it was aligned. The welders then tacked everything, measurements rechecked, verified, and if correct, welded.
In your case, measure from the center of the tongue, at the front end, to the outside of the right then left sides of the axle. When equal, it is aligned, and will pull straight.
Just my $.02 worth.
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