Gooseneck Design over 30,000lb GTW

[FiniteMatt]

Is there a standard for gooseneck trailers over 30,000lb, similar to J2638 which is for <=30,000lb? I'm designing a 40,000lb trailer and wondering if there's a sister spec that I can't find. I can probably make J2638 work but wanted to check.

 

[BrianPetersen]

https://accessories.ford.ca/shop/en/ca/exterior/hitches-towing-and-recovery/hitch-kit-gooseneck-40-000-gtwr-pc3z-19f503-a

https://maxxdtrailers.com/lhx-40k-heavy-duty-flatbed-gooseneck

[FromInv] Gooseneck Low-Pro w/14" 22 lb I-Beam Frame 40,000 Lb (3x15,000s) 4

Shop for Load Trail Gooseneck Low-Pro Trailer w/14" 22 lb I-Beam Frame 40,000 Lb at Bluewater Trailers today and have the trailer delivered to your door. Drive in today to tour our lot of in-stock trailers or customize one today to fit your needs.

bluewatertrailers.ca

I don't see any standard for trailers beyond 30k, either. I suspect that at the time this standard was written, that was at or more than the limits of any pickup truck at the time. I don't know if the existing trailer manufacturers are doing anything differently beyond the limit of that standard, aside from making stuff even stronger where needed. The standard is voluntary.