That's your answer. I imagine they help hold the "roof" down, whether that be tarp, tin, etc. Kotter: "You are lucky I'm truly not the vindictive or psycho type I'd be careful from now on, and I'd just back the hell off if I were you Originally Posted by Rain Man. It's to prevent a phenomenon known as "roof rumble". The roofs are called "bowstring", cause they're built on a roof truss shaped like an archer's bow The wooden trusses are nailed to the top plate of the exterior sidewalls of the home.
The sheet metal roof skin is screwed only at the perimeter of the mobile home, along the top plates NOT across the top of the trusses. This is because the metal roof skin and the wood framing expand and contract at different rates in temperature changes. If the roof skinning was fastened to each truss across the top of the roof, you'd eventually have leaks roof galore. Because the skinning is not fastened across the top of the roof, it tends to rumble whenever a good wind blows up.
The weight of the tires prevent the rumbling. I've lived in Fla. Watch out in the wintertime though; the tires will fill with rain and snow, and turn to ice, which puts alot of weight strain on your roof trusses.
Got this off of yahoo. I was curious as well. Why Not? Originally Posted by KC Tattoo. So it sounds like my theory is correct on mobile homes related to resonance. But if it's also about weight, the houses must be poorly built if a frame house needs tires to keep the roof on.
Most houses keep their roof just fine without tires on it. Originally Posted by Simply Red. I get squirrels running across my roof and they sound like bowling balls. Originally Posted by TribalElder. All times are GMT You can run bias ply tires on your camper and radials on your tow vehicle, but you cannot mix bias and radial tires on the trailer itself.
Bias plies are cheaper but have a shorter life and get lower fuel mileage. Some builders offer better tires as an option. Economy trailers and the increasingly popular light travel trailers usually have basic ST tires. They will have load capacities suitable for the loaded trailer, but they probably are rated 65 mph.
Better ST tires are speed rated M, to 81 mph. You can replace the standard tires with STs that have a greater load range, such as D or E. Most trailer tires, especially the more affordable, are made in China.
Shop carefully. For a while, Chinese-made LT tires and high-performance passenger tires had the same problem. Although some Chinese tires are poorly constructed, others are better built—and cost more. Many U. Read the tire reviews, not just the publicity write-ups. LT tires are intended for vehicles that generate stress with heavy loads—pickups, commercial vans, and heavier SUVs. Their stability makes them ideal for mounting on a tow vehicle.
Over the last couple of years, some camper trailer makers, including high-end manufacturer Airstream, have offered LT tires as an option. Some trailer builders have even made LTs standard. ST tires and LTs differ. A soft brush with light pressure may be used and always follow the washing with a thorough clear water rinse. In the past couple of years, it has come to our attention that many states and local governments are using chemicals on the road that are cost effective for them to keep the highways free of snow and ice.
In some states the wiring has also been affected. Please call your local government and find out what they may be using and what they recommend to remove those chemicals before they cause damage to your trailer. Over cleaning or scrubbing of a coated metal surface can do more harm than good to the life of the metal and its finish. Solvent and abrasive type cleaners should be avoided. Check your roof before every trip for debris from trees or buildings.
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