What is railroaded fabric?

The same sofa and fabric can produce different yardage requirements depending on how the material is applied. Railroaded fabric is designed or approved for crosswise application, allowing the roll’s length to run across a long upholstered surface.

Up-the-bolt application follows the fabric’s usual lengthwise orientation. The choice affects pattern direction, seams, and material use. Settle it with the maker before the customer buys COM yardage, rather than leaving the cutter to interpret a swatch.

What is the difference between railroaded and up the bolt?

The selvages are the finished edges running along the length of a fabric roll. In railroaded application, the top edge of the upholstered panel runs parallel to those selvages. In up-the-bolt application, the panel’s top edge runs across the fabric width.

Thonet’s cutting guide uses those two orientations and asks for specific instructions on the purchase order. The maker’s drawing should establish how the selected pattern will appear.

Here is an original orientation sketch, viewing the unrolled fabric from above. The short horizontal marks represent the intended top edge of an upholstered panel.

Roll length runs downward; selvages run down both sides.

UP THE BOLT                     RAILROADED
selvage |  ─────────  | selvage   selvage |  |  | selvage
        |  panel top |                  |  |  |
        |            |                  |  |  | panel top
        v            v                  v     v

Top edge crosses roll width.    Top edge follows roll length.

Railroading can let a long sofa back use continuous roll length instead of piecing together sections limited by the fabric’s width. It does not promise a seam-free sofa: the frame, panel sizes, and upholstery construction still determine the seams.

Can every fabric be railroaded?

No. The pattern, nap, stretch, and construction must support the intended direction. Rotating a directional design can put birds sideways or make a stripe run across the cushion instead of up the back.

Ask the maker to approve the actual fabric and application. A fabric may look plain from across the showroom but have a pile or weave direction that matters in use. The swatch is small; its opinions about orientation can be surprisingly strong.

Keep the face side and direction marked on the cutting sent for review. If the fabric is reversible, specify which face belongs on the furniture too.

Why does direction change yardage?

Direction changes the shapes that can be cut from the roll. Seams and pattern matching can consume additional length, especially when a repeat must align across adjacent sections.

For an illustrative quote, suppose the maker requires 14 yards for an approved railroaded layout and 18 yards for an approved up-the-bolt layout. The extra 4 yards belong to that cutting plan. They are not a universal percentage to add to every COM order.

The Gregorius Pineo COM form explicitly warns of extra seams for off-bolt application on larger items. It also asks for repeat information. Obtain the maker’s yardage for the selected frame, fabric width, repeats, and direction before ordering material.

Who decides: the customer or the vendor?

The customer approves the appearance; the maker establishes what it can build with the material. Bring those decisions together in a written application instruction.

A customer can ask for vertical stripes, but the request still needs a workable cutting plan and a price. If the maker proposes a different direction or seam arrangement, show the customer the consequence before approving it. Keep the accepted drawing with the PO.

For customer’s own material, agree this before fabric is purchased or shipped. The same principle applies to customer’s own leather: material dimensions and usable areas affect the cutting plan, even though hides are not fabric rolls.

How do you explain the extra yardage on the quote?

State the approved direction and the reason for the quantity. “Yardage includes matching the repeat across the back and cushions” explains the work more clearly than “extra fabric required.”

Keep material cost separate from any COM labor upcharge. Additional yards and additional upholstery labor can both occur, but they answer different questions. Also record who buys the fabric and where it must be sent.

If the customer changes the frame size or direction, ask the maker to recalculate the requirement. The original quantity belongs to the original plan.

How does OrderPilot record the choice?

Put the fabric’s permitted application in its value description. An optional Railroad choice can be shown only for fabrics where the maker allows it, using rules on the product template.

If the application carries an extra price, give the choice its configured price. A Number option can record COM yardage for the quote. Use the maker-approved quantity, rather than treating the field as an automatic yardage calculator.

The selected options stay with the specification used for purchasing. Staff and the customer can review the agreed direction before it reaches the cutting table.

For the next decision, read COM charges and cuttings for approval, so the material, application, and price are agreed together.

Sources

1. Fabric cutting practices — Thonet.
2. COM/COL/COT identification and application form — Gregorius Pineo, September 26, 2024.