Flatbed Shipping Guide

Flatbed shipping covers freight that can’t fit in a dry van — machinery, steel, lumber, construction materials, oversized industrial components, and anything loaded or unloaded by crane or forklift from the top or sides. If you’re a shipper moving palletized boxed goods, you’ll rarely need flatbed. If you move anything that’s heavy, wide, tall, or irregularly shaped, flatbed is your default equipment.

BlackBridge Logistics runs flatbed freight daily across the Northeast, Midwest, and Southeast, including specialty moves out of steel mills, lumber yards, precast concrete plants, and construction sites. This guide covers equipment types, securement basics, when flatbed beats dry van, permit and escort overview, and how to prepare freight so it ships on the first attempt instead of getting refused at pickup.

What is flatbed shipping?

A flatbed trailer is an open deck with no roof, no walls, and no rear doors. Freight is loaded from the top or sides using forklifts, cranes, or overhead gantries, then secured with chains, straps, coil racks, or tarps. The standard over-the-road flatbed is 48 or 53 feet long, 8.5 feet wide, with a deck height around 58-60 inches. Maximum legal payload is 48,000 pounds on a 5-axle configuration before you move into overweight permit territory.

Flatbed is the default for any load that exceeds dry van dimensional limits, any load too heavy for a 48-foot van’s floor rating, and any load that needs to be lifted off rather than rolled out. It’s also required for most construction, steel, and oversize freight regardless of weight.

Flatbed equipment types

The word “flatbed” covers a family of equipment, and picking the wrong one will cost you a day and a re-dispatch fee.

• Standard flatbed — 48 or 53 feet, deck height ~60 inches. Used for steel coils, lumber bundles, palletized machinery, building materials. Legal height for cargo is 8.5 feet before you trip the 13’6″ overall limit.
• Step deck (drop deck) — Has a lower rear deck, usually around 40 feet long with a 40-42 inch deck height. Lets you haul freight up to about 10 feet tall legally. Used for tall machinery, forklifts, small excavators, anything that would be too tall on a standard flatbed.
• Double drop — Has a well in the middle of the trailer that sits 18-24 inches off the ground. Well length is usually 25-29 feet. Used for very tall freight like transformers or tall equipment that needs to fit under bridges.
• RGN (removable gooseneck) — The gooseneck detaches so cargo can be driven onto the trailer. Standard for construction equipment like dozers, excavators, loaders, and anything you’d otherwise need a crane to load. Multi-axle RGNs handle heavy haul in the 80,000-150,000+ pound range with permits.
• Conestoga — A flatbed with a retractable tarp system on a metal frame. Gives you weather protection without requiring manual tarping. Good for finished metal products, painted equipment, and anything sensitive to rain that still needs side or top loading.
• Extendable / stretch trailers — Flatbeds or step decks that extend to 60-80+ feet for long cargo like wind blades, pipe, structural beams, or utility poles.

Load securement basics

Flatbed securement is governed by FMCSA 49 CFR 393 Subpart I. The short version: aggregate working load limit (WLL) of tiedowns must equal at least half the cargo weight. Most loads require a minimum number of tiedowns based on length — one for cargo up to 5 feet and 1,100 pounds, two for longer cargo, plus one additional tiedown for every additional 10 feet.

Specific commodity rules apply to logs, dressed lumber, metal coils, paper rolls, concrete pipe, intermodal containers, vehicles, heavy machinery, and flattened cars. Steel coils in particular have specific rules for eye-to-sky vs eye-to-side orientation, using coil racks or timbers. If the driver can’t secure the load properly with what you handed him, it’s going back on the dock.

When flatbed beats dry van

• Freight won’t fit through a van’s rear doors (110″ wide × 110″ tall interior)
• Freight exceeds the van’s 45,000-pound payload floor rating in a small footprint (concentrated point loads)
• Consignee has no dock and no forklift — needs crane or overhead lift off the top of the trailer
• Shipper loads from an overhead gantry or rail spur
• Freight is over 102″ wide, over 102″ tall inside, or over 53′ long
• Cargo includes steel, lumber, pipe, coils, or construction equipment as a matter of industry standard

Permits and escorts

Anything over 8’6″ wide, 13’6″ tall, 53′ long, or 80,000 pounds gross is oversize or overweight and needs state permits for every state it crosses. Permits can take 1-5 business days depending on state and complexity. Expect pilot car (escort) requirements when width exceeds 12 feet or height exceeds 14’6″. Some states require police escorts above certain thresholds. New Jersey, Pennsylvania, and New York all enforce aggressive route restrictions — a permit in one state doesn’t guarantee movement in the next.

Curfews matter too. Most states block oversize movement at night, on weekends, and on holidays. A Friday afternoon pickup with a Monday delivery isn’t a weekend job on an oversize load — it’s a Monday pickup minimum.

How to prepare freight for flatbed pickup

• Confirm dimensions and weight — actual, not estimated. A 6″ underestimate on width can turn a legal load into a permit load.
• Pre-stage loading equipment — forklift with correct fork length, crane with correct rigging, or overhead hoist.
• Provide tarps if needed — most carriers carry tarps, but steel tarps (heavy 18-24 oz) vs lumber tarps differ. Specify at booking.
• Identify attachment points — where chains and straps can go without damaging finished surfaces. Use edge protectors on painted or polished goods.
• Have the bill of lading ready with accurate piece count, weight, and NMFC class if applicable.
• Check consignee readiness — unloading equipment, yard access for a 75-foot combination, and appointment if required.

Specialty flatbed verticals

Flatbed shows up in nearly every industrial vertical: steel service centers, precast concrete, lumber and building materials, HVAC equipment, solar panel frames, machinery manufacturing, energy infrastructure, and port drayage for oversize containerized cargo. Automotive parts importers moving tooling, presses, or die sets out of port routinely need step deck or RGN equipment — see our automotive parts drayage service for containerized movement that transitions to flatbed on the outbound leg.

Get a flatbed quote

BlackBridge Logistics handles flatbed, step deck, double drop, RGN, and Conestoga moves across the continental US, with strong capacity in the Northeast, Mid-Atlantic, and Southeast. Our dispatch team manages permits, escorts, and multi-state routing in-house. Call (516) 252-3395 or request a quote through our flatbed page. For broader shipping programs across equipment types, see our shipper services overview.