If I remember right they average around 8000 lbs with a single axle.
Dog-trailer (Pup trailer)A dog-trailer (also called a pup) is any trailer that is hooked to a converter dolly, with a single A-frame drawbar that fits into the Ringfeder or pintle hook on the rear of the trailer in front, giving the whole unit three to five articulation points and very little roll stiffness.
Pete the Pup died on 1946-01-28.
Fatty's Plucky Pup was created on 1915-06-28.
25,000 - 40,000 lbs. or more, depending on specifics. When you say "tractor-trailer", you're citing an all-inclusive category which would include everything from a single axle tractor pulling a 28' single axle trailer up to heavy haul units of over 20 axles... I've personally run combinations which have weighed in excess of 250,000 lbs. empty.
most all bumper pull travel trailers should be under 4 thousand pounds
Fatty's Plucky Pup - 1915 was released on: USA: 28 June 1915
Dippy Advertises for a Pup - 1911 was released on: USA: 28 October 1911
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Your tractor drive tandems could weigh in at 34,000 lbs, but you could only have 20,000 lbs. on the single axle of the trailer.
Pintle hooks are found on the back of a 28 foot trailer, they are used to attach a dolly witch is used to attach a second 28 foot trailer.
The 1978 Glendette 290 Standard Travel Trailer or the Glendette Deluxe 290 Travel Trailer by Glendale Corp. Strathroy, Ontario. The dry weight is estimated at 4718 lbs and the dry hitch weight is estimated at 562 lbs. This info comes out of 1987 Glendette brochure for model 295. From 1977 to 1992 the construction of the Glendette travel trailer was pretty much standard. Taking the specs out of a 1987 brochure would be really no different then a 1978 model which would have been the 290 model. This would be the closest model number for a 28' trailer in that year. If it is a Glendette Deluxe with molded ABS front and back add about 400lbs to the dry weight because of the moulded front and back as well as the heavier cabinetry inside the trailer. For gross weight the Glendette of this size would have had axles rated for 6500 to 7000lbs combined. This would allow for a cargo carrying estimate of approximately 1700 to 2200 pounds maximum. There should be a sticker on the road side of the unit indicating this in kg. Also in one of the cabinets inside there should be a manufacturer's unit fact sheet with this same info. The best advice is to take your Glendette to a truck weigh scale and weigh it empty to see how accurate the mfg information was in the brochure. The difference if any will also affect the hitch weight of your unit. A hitch weight is 10 to 15% of the units actual weight .
We have a 25' and it weighs 4800 lbs.most RV centers will give you that info, i found it online at a web site that gives estimates for trailers.