Flat Deck Freight: Equipment, Securement, and Permits — A Complete Shipper's Guide

What It Means

Flat deck freight -- also called flatbed freight or open deck freight -- refers to cargo transported on a trailer with no sides or roof. Instead of an enclosed box, the cargo sits on an open platform and is secured directly to the trailer deck using straps, chains, binders, and blocking. This open configuration is what makes flat deck suitable for freight that cannot physically fit inside a dry van or reefer trailer.

The term 'flat deck' is the standard Canadian terminology for what is often called 'flatbed' in the United States. Both terms refer to the same category of equipment. Within the open deck category, there are multiple trailer types -- standard flat deck, step deck, double drop lowboy, and removable gooseneck (RGN) -- each designed for freight with different height, weight, and loading requirements.

Flat Deck vs. Dry Van: Key Differences

• Dry van: Enclosed trailer with walls and roof; freight is loaded through rear doors at dock height; maximum interior height typically 8.5 ft; ideal for palletized, packaged, or sensitive freight
• Flat deck: Open platform trailer with no sides or roof; freight loaded from the side, top, or end; no practical interior height limit (legal road height applies instead); ideal for oversized, heavy, or irregularly shaped freight
• Step deck (drop deck): Two deck levels -- a short upper deck at the front and a lower main deck; allows freight taller than 8.5 ft to move within legal height limits without oversize permits
• Double drop lowboy: Lowest deck height of any trailer type; used for very tall or very heavy freight such as large excavators, cranes, and heavy industrial equipment
• RGN (Removable Gooseneck): Front gooseneck detaches so self-propelled equipment can be driven directly onto the trailer

Why It Matters

Choosing the wrong equipment type is one of the most common and costly mistakes in freight planning. Booking a dry van for freight that requires open deck either results in a failed pickup when the driver arrives and cannot physically load the cargo, or -- worse -- an unsafe load that creates liability for the shipper. Matching freight to equipment correctly before booking saves time, money, and risk.

• Legal compliance: Open deck cargo must be secured to NSC Standard 10 (Canada) or FMCSA 49 CFR Part 393 (US) requirements -- non-compliant loads are subject to roadside inspection fines and carrier liability
• Oversize permits: Cargo exceeding the provincial height limit, the standard 2.6 m (8.5 ft) width limit, or the allowable axle and gross vehicle weights for the route requires advance permits from each province or state the truck will pass through -- thresholds vary by jurisdiction and axle configuration
• Loading method: Open deck freight may require crane-set, drive-on, or heavy forklift loading -- confirming loading method before dispatch prevents costly delays at pickup
• Carrier specialization: Not all carriers run open deck equipment; finding vetted flat deck capacity on the lane you need requires a broader carrier network than dry van alone
• Transit planning: Oversize loads may have restricted travel windows (daylight only, no holiday travel, specific highway routes) that affect scheduling

How It Works

Weight and Dimension Limits

Legal limits for flat deck loads are set by each province and state and depend on axle configuration, road designation, and the specific route. The following benchmarks give shippers a general planning framework, but the applicable limits for any shipment must be confirmed for the specific route and jurisdiction:

• Gross vehicle weight (GVW): Canadian GVW limits are axle-configuration based and set by each province -- a standard 5-axle tractor-trailer combination is typically permitted at approximately 39,500 kg in most provinces, and multi-axle configurations (B-trains, super B-trains) allow significantly higher weights. These limits are substantially different from the US federal interstate standard of 80,000 lbs (36,287 kg), which applies to interstate highways in the United States
• Legal load height: Height limits vary by province and highway corridor -- most provinces use a general limit in the range of 4.15 m (13.6 ft), measured from road surface to the highest point of the load, but specific limits and bridge clearances vary by route. Confirm the height restriction for your specific corridor before dispatch
• Legal load width: 2.6 m (8.5 ft) without a wide load permit in most Canadian and US jurisdictions
• Deck payload: A standard 48-ft flat deck can carry substantial cargo weight within the legal axle limits for the route -- actual payload capacity depends on axle configuration, weight distribution, and the applicable provincial weight limits
• Deck length: 48-ft and 53-ft flat decks are the most common configurations; longer loads may require multi-axle or specialized equipment

Cargo Securement: NSC Standard 10

All flat deck cargo in Canada must be secured in compliance with NSC Standard 10 -- the National Safety Code standard for cargo securement. NSC Standard 10 is aligned with the Commercial Vehicle Safety Alliance (CVSA) North American Standard and mirrors the FMCSA requirements for US operations, making cross-border loads seamless from a standards perspective.

• Working Load Limit (WLL): The total aggregate WLL of all tiedowns must equal at least 50 percent of the weight of the cargo being secured
• Minimum tiedowns: Cargo 1.52 m (5 ft) or less in length AND 500 kg (1,100 lbs) or less requires at least 1 tiedown. Cargo exceeding either of those thresholds, up to 3.04 m (10 ft) in length, requires at least 2 tiedowns. Each additional 3.04 m (10 ft) of cargo length beyond the first requires one additional tiedown
• Forward restraint: Tiedowns must prevent forward movement equal to 0.8 times the weight of the cargo (the load must withstand an 80 percent deceleration force forward)
• Commodity-specific rules: Lumber, steel coils, metal coils, concrete pipe, intermodal containers, vehicles, and heavy equipment all have specific securement requirements beyond the general rules
• Blocking and bracing: Many flat deck loads require blocking, bracing, or edge protection to prevent shifting -- especially round or irregularly shaped freight

Oversize and Overweight Permits

When a load exceeds legal height, width, length, or weight limits, an oversize or overweight permit is required from each province or state the truck will travel through. The permit process must be initiated before the truck departs -- driving an oversize load without a permit is a serious regulatory offence with significant fines and potential load seizure.

• Wide loads (over 2.6 m / 8.5 ft): Require a wide load permit and typically pilot car escort vehicles depending on width and jurisdiction
• Over-height loads: Loads exceeding the provincial or state height limit for the specific route require a height permit and may require a route survey to confirm bridge clearances and overhead obstacles -- height limits vary by province and highway corridor
• Overweight loads: Require an overweight permit specifying axle weights; may require reduced speed limits and restricted routes
• Superloads: Loads exceeding 200,000 lbs or extreme dimensions require the most complex permit packages -- engineering analysis, escort requirements, and provincial/state approval timelines of several weeks are common
• Timing: Standard oversize permits in Canada typically take 1-5 business days; complex or multi-province superloads require significantly more lead time

Common Challenges

Flat deck shipments present challenges that do not arise with enclosed freight. Shippers who are new to open deck logistics frequently underestimate the coordination required.

• Loading method mismatch: Arriving with crane-loaded freight when only a forklift is available -- or vice versa -- causes costly delays; confirm loading method in advance
• Underestimated permit timelines: Assuming permits can be obtained same-day often derails a planned move; build permit lead time into the shipping schedule
• Tarpaulin requirements: Some freight requires tarping for weather protection -- not all flat deck carriers carry tarps, and tarping adds loading time; confirm tarp requirements when booking
• Securement knowledge gaps: Shippers who have only managed dry van freight are often unaware of the specific tiedown requirements for their cargo type -- getting this wrong creates liability and roadside inspection exposure
• Driver detention at loading: Complex crane-set or drive-on loading operations take significantly longer than dock loading -- plan for extended pickup windows and confirm detention terms in advance
• Pilot car coordination: Wide or over-height loads requiring pilot cars need advance sourcing; last-minute pilot car requests in rural areas often cannot be fulfilled quickly

Best Practices

Experienced flat deck shippers follow a consistent pre-dispatch checklist to avoid the most common causes of delay and non-compliance.

• Confirm dimensions and weight before booking: Accurate height, width, length, and weight measurements determine equipment type and permit requirements -- guessing leads to surprises
• Identify loading method early: Crane-set, drive-on, side-fork, or end-loading requirements must be communicated when the load is booked, not when the truck arrives
• Start the permit process early: For multi-province moves or oversize loads, contact your broker at least one week before planned pickup to allow permit processing time
• Specify tarp requirements: If cargo needs weather protection, confirm tarp availability and size with the carrier before dispatch; standard tarps cover most flatbed loads but specialized tarps (lumber tarps, coil tarps) are specific equipment
• Use the right securement equipment: Chains for heavy or hard-edged freight; straps for equipment or freight that cannot be marred; binders appropriate for the load weight -- do not substitute equipment to save time
• Plan for restricted travel windows: Oversize loads often cannot move at night, on weekends, or on statutory holidays; plan pickup and delivery accordingly to avoid a load sitting on a trailer at a receiver

When to Use This Service

Flat deck freight is the right choice whenever your shipment meets one or more of the following criteria:

• Freight height exceeds 8.5 ft (the standard interior height of a dry van or reefer trailer)
• Freight must be loaded from the side or top rather than through rear trailer doors at dock height
• Freight dimensions or weight require oversize or overweight permits
• Freight is machinery, construction equipment, or vehicles that must be driven or craned onto the trailer
• Freight includes structural steel, lumber bundles, pre-cast concrete, or other items that are standard flat deck commodities
• Freight has unusual dimensions (very long, very wide, or irregularly shaped) that cannot be accommodated in an enclosed trailer

If you are unsure whether your freight requires open deck equipment, the OTR Hub Trailer Equipment Selector walks through the key dimensions and loading requirements to recommend the right trailer type. For shipments with complex permit requirements, contact OTR Logistics Solutions early to allow time for permit processing and route planning.