Oversize Flags

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Oversize flags for trucks and trailers. Red 18″ x 18″ mesh warning flags for marking the extremities of wide, long and projecting loads, in four mounting styles: wire loop, grommets, bungee cord and wooden dowel. Each flag comes individually shrink-wrapped.

Oversize Load Flag Rules (49 CFR 393.87)

Federal rules require warning flags on any commercial motor vehicle whose load extends more than 4 inches beyond the sides or more than 4 feet beyond the rear. Each flag must be at least 18 inches square and red or fluorescent orange. A load projecting from the rear needs one flag if the projection is 2 feet wide or less and two flags if it is wider. Our red 18″ x 18″ flags meet the size and color rule. Oversize permits and state rules can add requirements, such as flags at every corner of a wide load or lights at night, so check your permit.

Which Flag Mounting Style Do You Need?

FlagMountingBest for
Mesh flag, wire loopWire loopHooking or clipping onto the load, mirror brackets or banner corners
Mesh flag, grommetsTwo grommetsTying to the load with rope, bungee cords or zip ties
Mesh flag, bungee cordSewn-in rubber bungeeQuick wraps around load corners, rails and pipes
Mesh flag, wooden dowelWooden dowelFlag holders and brackets on the truck or trailer

How Many Oversize Flags Do You Need?

Count the points that need marking. A rear projection needs one flag when it is 2 feet wide or less and two when it is wider. Wide loads are commonly flagged at each corner of the widest point, which is why most drivers carry at least four. Keep spares in your side box, because flags fray and fade with use.

Pair your flags with an oversize load banner for the front and rear, get both in our oversize load kit, or see all oversize load accessories.

Frequently Asked Questions About Oversize Flags

  • What size are oversize load flags?
    Federal rule 49 CFR 393.87 requires each warning flag to be at least 18 inches square. Our oversize flags are 18 x 18 inches.
  • What color must oversize flags be?
    Red or fluorescent orange. Our mesh warning flags are red.
  • When are warning flags required on a load?
    When a commercial motor vehicle carries a load that extends more than 4 inches beyond the sides or more than 4 feet beyond the rear. Oversize permits can add more flag requirements.
  • How many flags do I need for an overhanging load?
    A rear projection needs one flag if it is 2 feet wide or less and two flags if it is wider. Wide loads are commonly flagged at each corner of the widest point, so most drivers carry at least four.
  • Which flag mounting style should I choose?
    Wire loop flags hook or clip onto the load, mirrors or banner corners. Grommet flags tie on with rope, bungee or zip ties. Bungee flags wrap quickly around corners, rails and pipes. Wooden dowel flags fit flag holders and brackets.
  • Why use mesh warning flags?
    Mesh lets wind pass through, so the flag whips less and lasts longer at highway speed while staying visible.
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