Hi all!
For folks doing scrap as more than a hobby and hoping to scale up their business thought I'd post some basics on full truckload and container freight shipping. For organizing freight shipping I'mmmmmm not your guy lol. Luckily there is a forum member who is! Check the buyer/seller section for a very well reviewed provider of freight services. But I do ship and receive multiple full truckloads of scrap every week as well as a few containers monthly. So here's the basics.
For highway freight your standard trailer is between 48-53' long. Some carriers also offer 28' trailers. Depending on the weight of the cab your maximum allowable freight load will almost never exceed 45,000lbs in order to stay under the 80,000lb interstate limit. On average, a full truckload by weight is gonna be 43,000-44,000lbs. Some states have higher allowable intrastate limits but if the vehicle is traveling over an interstate highway its maximum weight will be 80,000lbs. In theory if the trucks' empty weight is 32,000lbs then your load could be 48,000lbs but it becomes very difficult to properly axle the truck (you can only have so much weight per axle) at that weight.
By space instead of weight, the maximum amount of standard gaylords (48x40x36") on pallets is 44 for a 48' trailer and 48 on a 53'. In theory you can have a couple more but that is only if each is stackable and fits without overhang on a standard 48x40" pallet. In practice that is pretty much never the case. Gaylords can be too weak to stack or bulging over the pallet or not centered on the pallet and so on.
A full truckload by space dimensions doesn't mean it will be full by weight. A standard gaylord of Al/Cu radiator ends won't be much more than 600lbs, and office phones closer to 450lbs. A full truckload of nothing but 450lb gaylords isn't even gonna be 20,000lbs total. This means your price per pound for full truckload freight is gonna be higher than if you shipped 40,000+ lbs. For example if you're shipping a 43,000lbs of something a few hundred miles for $850 you're spending about .019/lb on shipping. But a full truckload at that same price that weighs 19,800lbs would be a little under .043/lb. So if you bought something at .05/lb and sell it al .10/lb, you could absorb that .019/lb shipping and still make about $1300. (43000 x .05= $2150, 43000 x .10= $4300. 4300-2150=$2150. $2150-850= $1300). But at 19,800lbs this total profit drops down to $140. $1300 can justify quite a bit of time to collect and organize and load the material. $140 much less so. So if you're shipping a full truckload of something relatively light, you need a big enough margin to absorb the higher per pound freight rate while a full truckload of something heavier can even be done for things with lower margins.
To maximize load weight and reduce your per pound freight rate for a 53' trailer that is actually filled around 48' you'll want to average about 900lbs per foot or 3600lbs per four feet. So if you have two standard pallets side by side they'll need to average 1800lbs. That average will get you 43,500lbs. If filling a 40' shipping container to the same weight, you'll want around 1080lbs per foot or closer to 2160lbs per standard pallet space.
Point of all of this being that surprisingly inexpensive items like ac adapters, low grade aluminum breakage, cast iron and more can be shipped freight with a fine margin and relatively small investment provided you have the time and space to accumulate. And for heavier inexpensive items like sealed units, copper transformers and heavy aluminum breakage like transmissions and engine blocks, it takes surprisingly little space to arrive at a full truckload weight. 11-14 full gaylords of sealed units is enough for a full truckload, a couple more for electric motors. Or in the case of mixed loads, 4 or 5 4000lb pallets compensates for quite a few 300-600lb pallets to get the average weights you need.
Anyway those are some of the basics for full truckload freight shipping. Hopefully this can help you figure out whether saving up full truckloads of scrap is something you wanna pursue.
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