Overweight container drayage in Charleston, with the right chassis and the right permits.

What "overweight" means in Charleston drayage

A standard 5-axle tractor-chassis combination in South Carolina is legal up to 80,000 lb gross — translating to roughly 44,000 lb of payload in a 40' container. Anything above that gross is overweight, and most 20' containers loaded to international spec end up there.

Tri-axle chassis push the legal weight up to roughly 60,000 lb of payload with state permits, depending on configuration. We carry tri-axle equipment specifically because Southeast manufacturing flows (paper, metals, ceramics, food ingredients) regularly run heavy.

Permits, routes, and the boring details that matter

• South Carolina overweight permits — pulled by us, billed pass-through
• Bridge restriction awareness on heavy lanes (we route around weight-restricted bridges)
• Tri-axle availability scheduled in advance, not at the gate
• Driver match — overweight runs go to the drivers used to handling the equipment

The SCDOT 100,000 lb permit — Charleston's overweight container ceiling

South Carolina carries one of the highest container weight allowances on the East Coast. SCDOT's Oversize/Overweight Permit Office issues a permit that lets an international shipping container move by truck at up to 100,000 lb gross vehicle weight — well above the 80,000 lb standard legal limit, and up from the 90,000 lb ceiling the state allowed before. For an importer or 3PL routing heavy cargo, that headroom is one of the quieter advantages of Charleston drayage.

On an overweight container transport move out of Charleston, the mechanics are straightforward: a tri-axle chassis carries the extra weight, we pull the SCDOT container permit before dispatch, and we bill it pass-through with no markup. A loaded box that would be illegal on a standard 5-axle then moves legally to a Berkeley, Dorchester, or Charleston County warehouse, or up the I-26 corridor toward Columbia and the Upstate. If a container is heavy enough to clear even the 100,000 lb permit, it crosses into superload territory — a separate permit, a route survey, and usually an escort — and we flag that before you book, not after.

Overweight container transport lanes we run out of Charleston

Where the box is picked up shapes the permit route. Heavy containers out of Wando Welch Terminal in Mount Pleasant leave via Long Point Road onto I-526, cross the Cooper River on the Don Holt Bridge, and reach the Berkeley County warehouse belt — Goose Creek, Ladson, Summerville, Moncks Corner — without touching downtown Charleston. Heavy containers out of Hugh K. Leatherman Terminal and North Charleston Terminal are already on the North Charleston side of the river, so they go straight to I-26 for Dorchester County delivery points or the long haul north-west through Orangeburg to Columbia and the Upstate. The full terminal list is on our Charleston coverage page.

The commodities that run overweight out of Charleston are predictable: ceramic tile and stone imports bound for Charleston and Berkeley County distribution warehouses, paper and pulp exports from South Carolina mills, metals and machinery for Upstate manufacturing, and food ingredients loaded to international spec in 20' boxes. If you are a 3PL routing heavy freight through the Port of Charleston, tell us the gross weight and delivery ZIP up front — the permit route and tri-axle scheduling are set before the truck rolls, not at the gate.

Out-of-gauge (OOG) containers

OOG cargo — loads that exceed the standard container's internal dimensions and ride flat-rack or open-top — need extra coordination: tarping if open-top, tie-down inspection on flat-rack, sometimes pilot car or escort if oversized. We handle the equipment match and the route plan, and we'll tell you upfront when escort costs are on the bill.