NMFC 38170 – Stair Risers, Stringers or Treads | Class 55

To find the correct freight class for your shipment:

1. Bundle risers, stringers, and treads tightly with edge protectors and foam between finished faces; secure with two crosswise bands and one lengthwise band to prevent bowing.
2. Palletize long pieces lengthwise with no overhang; use 3 runners and top dunnage so forks don’t mark nosings or bullnoses on finished treads.
3. Flag lengths over 96–108 inches before tendering to avoid surprise overlength charges; consider a cradle or long skids for extra-long stringers.
4. Describe on the BOL as “Stair Risers/Stringers/Treads, Building Woodwork Group, NMFC 38170, Class 55, non-hazardous,” and list piece count and pallet count for quick approvals.

Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.

• Single, fixed Class 55 simplifies quoting and reduces reclass risk compared with density-rated commodities.
• Competitive LTL rates for wood stair components help control project freight budgets on multi-floor builds.
• Proper bundling and palletizing lowers handling damage, cutting OS&D claims on prefinished treads and delicate nosings.
• Clear documentation aligned to NMFC 38170 speeds carrier acceptance and minimizes accessorials tied to misdescription or overlength.