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Quiet the singing ladder

If you're running down the road with howling ladders atop the truck, you might want to try this trick. Squirt a dab of expanding polyurethane foam into the ends of the ladder rungs. Plugged-up rungs keep out the wind, eliminating the annoying hum of the high-speed extension ladder.

Joey Kaylor, Floyd, VA
From Fine Homebuilding 89, pp. 30
July 1, 1994

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