Flatbed Loading and Securement Best Practices

Overview of Flatbed Operations

Flatbed trucking is a specialized segment of the industry that hauls freight too large, heavy, or irregularly shaped to fit inside an enclosed trailer. Common flatbed freight includes steel coils and beams, lumber and building materials, heavy machinery, construction equipment, pipes and tubes, oversized manufactured goods, and military equipment. Unlike enclosed trailers, flatbed loads are exposed to the elements and must be properly secured to prevent shifting, falling, or blowing off during transit. Cargo securement is one of the most heavily enforced areas in roadside inspections, and securement violations are among the most common reasons for out-of-service orders.

FMCSA Cargo Securement Rules

FMCSA''s cargo securement regulations are detailed in 49 CFR Part 393, Subparts I and J. These rules establish minimum performance requirements for all cargo carried on commercial motor vehicles. Key requirements include:

General Securement Requirements

• Aggregate working load limit: The combined working load limit (WLL) of all tie-downs must equal or exceed 50% of the weight of the cargo being secured
• Forward restraint: Cargo must be secured against forward movement with strength equal to 80% of cargo weight
• Rearward restraint: Secured against rearward movement equal to 50% of cargo weight
• Lateral restraint: Secured against sideways movement equal to 50% of cargo weight
• Vertical restraint: Secured against upward movement equal to 20% of cargo weight

Minimum Tie-Down Requirements

The number of tie-downs required depends on the length and weight of the article being secured:

• Articles 5 feet or shorter and weighing up to 1,100 pounds: minimum 1 tie-down
• Articles 5 feet or shorter and weighing over 1,100 pounds: minimum 2 tie-downs
• Articles longer than 5 feet but not more than 10 feet: minimum 2 tie-downs
• Articles longer than 10 feet: 2 tie-downs for the first 10 feet plus 1 additional tie-down for each additional 10 feet or fraction thereof

Common Securement Methods

Chains and Binders

Grade 70 transport chain is the standard for heavy loads such as steel, machinery, and construction equipment. Chain binders (ratchet or lever type) are used to tension the chains. Each chain must be rated with a working load limit that matches the load requirements. Chains must be inspected before each use for stretched links, cracks, or damage.

Straps and Winches

Synthetic web straps (typically 4-inch polyester) secured with ratchet winches are the most versatile flatbed securement method. Straps are used for lumber, manufactured goods, bundled materials, and lighter loads. The WLL of the strap, ratchet, and any edge protection must be verified before use.

Blocking and Bracing

Blocking (placing solid material against the cargo to prevent movement) and bracing (using structural supports to hold cargo in position) supplement tie-downs and are required for certain commodity types. Coils, drums, and cylindrical objects require specific blocking arrangements outlined in the FMCSA commodity-specific rules.

Commodity-Specific Rules

FMCSA provides detailed securement requirements for specific commodities in 49 CFR 393.116-393.136:

• Logs: Specific stake and bunk requirements with defined minimum numbers of tiedowns
• Metal coils: Detailed requirements based on whether coils are transported with the eye vertical, crosswise, or lengthwise
• Paper rolls: Requirements for blocking and tie-down placement based on roll orientation
• Concrete pipe: Blocking and bracing requirements based on pipe diameter
• Intermodal containers: Twist lock and securement device requirements
• Vehicles: Minimum tie-down requirements for automobiles, trucks, and equipment on transport trailers

Common Flatbed Violations

The most frequently cited flatbed violations during inspections include:

1. Insufficient number of tie-downs for the length or weight of cargo
2. Damaged or worn tie-down components that reduce the working load limit
3. Failure to prevent forward movement of cargo (inadequate headboard or front blocking)
4. Loose or improperly tensioned tie-downs
5. Missing or inadequate edge protection where straps pass over sharp edges

Best Practices for Flatbed Drivers

• Always inspect all securement equipment before each load and reject any damaged components
• Check and retighten tie-downs within the first 50 miles after loading and at every subsequent stop
• Use edge protectors whenever straps cross metal edges to prevent cutting and maintain full WLL
• Tarp loads properly when required to protect freight and prevent wind damage to securement
• Document your securement with photos at the loading point for claims protection
• Maintain your operating authority with proper cargo insurance for flatbed commodities