Shipping Panels Within 1,000 Miles: How Flat-Pack Panel Delivery Works

A finished MBS wall panel reaches your job site on an ordinary flatbed. No pilot car. No state oversize permit. No route survey. That is flat-pack panel delivery, and it is one of the largest practical differences between panelized construction and volumetric modular.

MBS ships panels flat-packed and vertically on standard flatbeds, within 1,000 miles of our 40,000 sq ft CNC manufacturing facility in St. Louis. Here is what goes on the truck, why one width number decides the economics, and what your site needs before the trailer arrives.

What flat-pack panel delivery means

Flat-pack means the building leaves the factory as a kit of finished flat assemblies instead of finished three-dimensional boxes. Wall, floor, and roof panels are racked upright, strapped, and loaded in the order the crew will set them.

Each panel is already finished. Windows, doors, cladding, insulation, sheathing, and MEP are installed before it leaves the building. The vapor retarder is taped and air-sealed at the factory, not on a muddy site in February.

Volumetric modular ships differently. A module is a completed room or apartment with four walls, a floor, and a ceiling. Most of what rides on that trailer is air.

Why 102 inches decides the economics

Federal rules set the maximum width a state must allow on the National Network at 102 inches, roughly 8 feet 6 inches. Cargo that extends past 102 inches requires a state-issued overwidth permit, according to the Federal Highway Administration. Hawaii is the lone exception, at 108 inches.

Flat-packed panels ride inside that envelope. Volumetric modules do not. A typical module runs 12 to 16 feet wide, which makes every module an oversize load in every state it crosses.

One width number sets off a chain of costs: a permit in each state, escort vehicles, daylight-only travel windows, bridge and turn restrictions, and routes that add miles. Panels skip all of it and move as ordinary freight.

What rides on the truck

Three assemblies make up the load.

• Wall panels arrive finished, with windows and doors hung, cladding on, dense-packed insulation, sheathing fastened, and a 2x3 inch MEP service cavity pre-drilled to spec.

• Floor panels ship with engineered I-joists, rim board, and 7/8 inch tongue-and-groove OSB subfloor.

• Roof panels ship up to 10 feet wide, with I-joist framing, batt insulation, a vent channel under the deck, OSB decking, and underlayment already applied.

Because the assemblies are flat, a trailer carries far more finished square footage per trip than a module hauler does. You are shipping building, not volume. See the full MBS product range for what we build with these assemblies.

Why the radius is 1,000 miles

Freight cost is the constraint, not capability. National flatbed spot linehaul averaged $2.66 per mile before fuel in the week ending September 8, 2026, according to DAT Freight & Analytics. Every mile past the factory eats into the savings that panelized construction creates.

Inside 1,000 miles the math holds. That circle from St. Louis reaches Chicago, Minneapolis, Denver, Dallas, Atlanta, Nashville, and Pittsburgh, which covers most of the eastern half of the country. Most loads run one to two days on the road, so the delivery window is tight enough to sequence against the crane.

Push much past 1,000 miles and freight starts canceling out the factory gain. We state the radius up front rather than quote first and explain later. Panelized construction cuts project cost up to 30%, delivers 50% faster, and produces up to 90% less waste, and freight is part of keeping that promise honest.

How the delivery sequence works

Loaded in assembly order

Panels are racked in reverse order of installation, so the last panel loaded is the first one set. The load sheet and the assembly plan are the same document.

Unloaded straight to the crane

A finished panel goes from trailer to wall line in one pick. Less double handling means less damage, fewer hours, and a smaller site crew. Our services page walks through design, manufacturing, delivery, and on-site assembly as one scope.

Weather-tight in 4 days

MBS manufactures a 1,500 sq ft home in one week. On site, the crew assembles it to weather-tight lockdown in 4 days. Delivery is the hinge between those two numbers. Miss the truck window and the crane sits idle.

What your site needs before the trucks roll

Four things decide whether delivery day runs clean.

• Access. The trailer needs a road it can turn into and a place to stop with the load square to the crane.

• Crane position and swing radius. The crane should reach the trailer and the wall line without repositioning mid-load.

• Laydown space. Even with direct-to-crane unloading, plan a staging area in case weather or sequencing shifts.

• A confirmed window. Panels arrive sequenced, so the delivery slot and the assembly schedule are one decision.

MBS works these through during design, not the week before the trucks leave.

Flat-pack panels vs volumetric modules on the road

Panels ship at or under 102 inches as legal freight. Modules ship at 12 to 16 feet as oversize loads with permits and escorts.

Panels load dense, so one trailer moves a meaningful share of a building. A module hauler moves one module.

Panels reach tight infill and urban lots that modules cannot. Modules need wide streets, turning room, and often a street closure. That is why panels suit the infill and affordable housing work that MBS was built to do.

Offcuts stay on the plant floor instead of a site dumpster, which is a large part of how MBS keeps waste up to 90% below a conventional site build.

Frequently asked questions

How are prefabricated wall panels shipped?

Flat-packed and racked vertically on standard flatbed trailers. MBS panels ship inside the federal 102-inch width limit, so they move as legal freight without oversize permits or escort vehicles.

How far will MBS ship panels?

Up to 1,000 miles from the MBS facility at 921 N 20th Street, St. Louis, Missouri. That radius covers most of the eastern half of the United States, including Chicago, Dallas, Atlanta, Denver, and Minneapolis.

Do panelized wall panels need an oversize load permit?

No. Federal rules cap commercial vehicle width on the National Network at 102 inches, and cargo wider than that requires a state overwidth permit. Flat-packed panels stay inside that limit. Volumetric modules, typically 12 to 16 feet wide, do not.

Are the panels finished when they arrive?

Yes. MBS panels arrive with windows, doors, cladding, insulation, sheathing, and MEP pre-installed. The air and vapor barrier is taped and sealed at the factory before the panel is loaded.

How fast can a delivered panel package go up?

MBS manufactures a 1,500 sq ft home in one week. On site, the crew assembles it to weather-tight lockdown in 4 days. More answers are on the MBS FAQ.

Planning a project inside the 1,000-mile radius?

Tell us the site and we will tell you what fits on the truck and what delivery day needs. Get a quote or email info@modulebs.com. You can also read more about MBS and why we build this way.