S. Heisley wrote::thinking: Maybe we just need to rename the Trailer & Chassis Secrets topic to Trailer Chassis Frames?
That might help, too.
My suggestion has more to do with providing good plans people can use to plan/build/construct/weld a trailer frame. Some excellent trailer frame plans have been posted on TNTTT over the years within people's Build Journals, Offroad Construction Secrets, Member Designs, etc. that are kinda buried among hundreds, probably thousands, of posts. They are now very difficult to find hidden gems. Some have been lost because photos of them are no longer available.
My suggestion is to provide some ready to go plans in PDF format and/or in SketchUP that people could use, as is, to build a trailer frame, or use with a little customization. Lets rediscover, resurrect, and bring some of the best plans to the forefront in a sticky.
With the disappearance of lower cost Red Trailer, Harbor Freight and Northern Tool 4' x 8' and 5'x 8' trailer kits it seems the need is greater now more than before.
People who can or want to re-use a boat, pop-up camper trailer, etc. have another option.
A custom built trailer may not cost (much/if any) more than a (inferior quality) $600 to $1200+ utility trailer.
It's not unusual to spend a considerable amount of money, time and effort to fix or improve an off-the-shelf utility trailer, boat trailer, pop-up camper trailer, etc.
With a custom trailer you have much better control of the size, weight, strength, quality, parts costs, road worthiness, and myriad design details to build a trailer frame that best suits your wants, needs, budget and ability.
Having a sticky with several good trailer frame plans could be a very helpful resource for beginners and more experienced teardrop trailer builders.