Legally, about 140 - 150% of its tare weight. Most could haul significantly more if need be.
You could haul more weight in boats.
Factory Ramps might be able to help you with a trailer for your wheelchair.
check your vehicle GVW usually listed on the door sticker. Then subtract the weight of your truck with an empty flat bed. the remainder will be what you can haul.
7500
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The only information provided is that it's a 24' straight truck - that really tells us nothing in relation to the question you're asking. The payload it can haul is the tare weight (empty weight of the vehicle) subtracted from the Gross Vehicle Weight Rating. So, if it's a non-CDL Class 6 vehicle with a Gross Vehicle Weight Rating of 26,000 lbs. and a tare weight of 15,000 lbs., then it can haul 11,000 lbs. of payload. If it's a Class 7 truck (which does require a CDL) with a Gross Vehicle Weight Rating of 33,000 lbs., and a tare weight of 17,000 lbs., then it can haul 16,000 lbs. of payload. But without having the tare weight and Gross Vehicle Weight Rating of the vehicle you had in mind, it's impossible to tell you what you're looking for. Length doesn't determine how much weight it can haul.
you use your tutti
As much as it wants
No. U-Haul doesn't rent out trucks higher than Class 6, which have a GVWR under the weight requirements for a CDL.
26000 lbs of cargo? A tandem straight truck, such as a flatbed or a dump, could haul that amount of weight legally.
i believe its some where around 1000-1500 pounds