Hazmat Placard & Segregation Calculator

Evaluate placarding rules (49 CFR 172.504) and loading segregation (49 CFR 177.848)

Manifest & Load

Hazard Class Weight (kg)

Calculated Requirements

Aggregate Metrics

Table 2 Aggregate Weight: 0.00 kg
Table 2 Threshold (454 kg): Under Limit

Required Placards

None required based on inputs.

Segregation Check

No materials to compare.

About the Hazmat Placard & Segregation Calculator

Transportation professionals rely on this DOT hazmat placarding and segregation calculator to load commercial transport vehicles legally. By cross-referencing Table 1 and Table 2 commodities against weight limits, it dictates the exact exterior warning placards required. Furthermore, it automatically checks the segregation matrix to prevent incompatible materials from being loaded onto the same trailer, averting catastrophic reactions.

How it works

  1. Input the UN number, Hazard Class, and Packing Group for each hazardous material being loaded onto the transport vehicle.
  2. Enter the total aggregate gross weight mapped to each specific hazard class.
  3. Check the segregation matrix to verify that the combination of hazard classes is legally permitted in the same trailer.
  4. Review the final placarding requirements based on Table 1 mandates and the critical 1,001-pound (454 kg) threshold for Table 2 materials.

Frequently asked questions

What is the difference between Table 1 and Table 2 hazardous materials?

Table 1 materials (like explosives and poison gas) strictly require warning placards in any quantity, even just one pound. Table 2 materials only require placards when the aggregate gross weight on the vehicle reaches 1,001 pounds (454 kg).

Can I use a DANGEROUS placard?

Yes, a DANGEROUS placard can be used if a transport vehicle contains non-bulk packages of two or more categories of Table 2 materials, provided no single hazard category exceeds 2,205 pounds (1,000 kg) loaded at one facility.

What happens if materials are incompatible according to the segregation table?

Incompatible materials, designated with an 'X' on the DOT segregation table (e.g., Flammable Liquids and Poison Gases), cannot be loaded, transported, or stored together in the same transport vehicle under any circumstances.

Do intermediate bulk containers (IBCs) require different placarding?

Yes. Bulk packaging, including large IBCs and cargo tanks, generally requires hazard placards displayed on all four sides of the vehicle or container, completely regardless of the standard 1,001-pound weight threshold.

References