Just guessing, sorry, but most I've seen are in the 250 Lb range. However I've seen some posted 150 Lb, and some 300 Lb. Definitely should be nothing rated less than 150 Lb. I think all bunks could be a little beefier. Ours are rated at around 250 I think, but if I get up there (180 Lbs), it sure does flex a lot. Just like a kid, I had to try it out.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.