How far back can my tandems be?

When the distance between the first axle of your tandems is 35 feet from the rear axle on your tandems to the last axle of your trailer tandems, you will have to reduce the amount of weight that you load onto your truck.

Can tandems be all the way back?

I see lots of cr England, swift, werner with their tandems all the way back. Even when empty, all the way back. Like you do know its illegal in most states because of bridge laws, plus common sense that it turns better with the tandems moved up. I see drivers all the time with the tandems all the way back.

What is the maximum length your tandems Cannot exceed?

In addition to Bridge Formula weight limits, Federal law states that single axles are limited to 20,000 pounds, and axles spaced more than 40 inches and not more than 96 inches apart (tandem axles) are limited to 34,000 pounds. Gross vehicle weight is limited to 80,000 pounds (23 U.S.C. 127).

When can I move tandems?

TruckingTruth's Advice: With 35,400 pounds on the drive axles you must move a minimum of 1,400 pounds off the drive axles. To shift weight off the drive axles and onto the trailer tandems, you slide the trailer tandems forward toward the front of the truck.

How far back should an axle be on a trailer?

To know how far back the axle needs to be moved, we want to subtract the trailer's tongue weight from 10 percent of the total weight.

How To Know Which Hole To Slide Your Trailer Tandems | Scaling A Load For Legal Weight

How far apart should trailer axles be?

Expert Reply: When installing tandem axles on a trailer you want to have at least 4 inches between the tires. So if you went with the part # A225R6SMQ which has an overall diameter of 28.31 inches you would need to have the axles set at least 32.81 inches apart.

How far back can you load a 53 foot trailer?

You can load anywhere from 26 to 30 standard 40×48-inch pallets on a 53-foot trailer — 26 if you load them straight in (48-inch measurements from front to back), or 30 of you turn half the pallets sideways.

How far apart are tandem trailer axles?

Under the federal B formula, the axles must be 10 feet apart (though in practice they are placed 10 feet, 1 inch apart just to be safe for the times when a zealous enforcement officer measures that distance with a tape).

Why do shippers make you slide your tandems?

By sliding the trailer tandems forward, you will put more weight on the trailer tandems and take weight off the tractor's drive axles. Conversely, by sliding the trailer tandems toward the rear of the trailer, you will take weight off the trailer tandems and put more weight onto the tractor's drive axles.

What is bridge law?

The bridge formula law was enacted by the U.S. Congress to limit the weight-to-length ratio of heavy trucks, and to protect roads and bridges from the damage caused by the concentrated weight of shorter trucks.

How do you calculate bridge law?

W = 500(LN/N-1 + 12N + 36)

L = Distance in feet between the extreme of any group of 2 or more consecutive axles.

What is kingpin setback?

"Kingpin setback" means the longitudinal distance from the centre of the kingpin on a semi trailer to any point on the semi trailer, including its load, in front of the kingpin measured in the arc from the centre of the kingpin to the most distant point on the trailer or load in front of the kingpin excluding any ...

What is the tandem law in California?

The gross weight of each set of tandem axles shall not exceed 34,000 pounds and the gross weight of the two consecutive sets of tandem axles shall not exceed 68,000 pounds. (c) The distance between axles shall be measured to the nearest whole foot.

What is the Tennessee bridge law?

The maximum weights are governed by the bridge formula, with 80,000 lbs maximum weights. Some things to keep in mind in the state is that twin trailers are only allowed on designated routes, and also there exist routes that only 96” wide vehicles are allowed to travel.

How close can trailer tires be to each other?

As a general rule of thumb the minimum safe distance between front and rear tires on the same side of a tandem axle trailer is 4 inches. You would need to measure the distance between your tires currently and subtract 2-1/2 inches.

Where do you put the axles on a tandem trailer?

Simply mount the axles where the center of the assembly matches the 40 percent mark on the trailer frame. On a three-axle placement, for example, this would mean the center of the middle axle was at a point 40 percent in from the rear of the trailer.

How far can you hang off the back of a trailer?

California allows cargo to overhang a vehicle by 4 feet beyond the rear, 3 feet beyond the front and 4 inches beyond the side of the vehicle. You must use markings if the load extends 1 foot or more to the left or over 4 feet to the rear of any vehicle.

How far can a load overhang at the rear?

How far can a load overhang at the rear before you must use projection marker boards? Explanation: Projection marker boards must be fitted if the load on your vehicle overhangs by more than 2 metres (6 feet 6 inches).

How much overhang can you have on a semi trailer?

Per CVC Section 35410, the load upon a vehicle, trailer or semitrailer shall not extend to the rear beyond the last point of support for a greater distance than that equal to two-thirds of the length of the wheelbase.

Can I add a third axle to my trailer?

To add your third axle, you cannot simply add a hanger spring and axle. You can keep your 35 inch spacing but you will need to relocate your hangers.

How long should a trailer tongue be?

Trailer tongues need to be at least as long as half the tow vehicles width. Most cars and SUVs' range between 5' to 6 1/2' so the minimum length of tongue needs to be half of this plus a little bit more (say 8-12") to gain a margin of clearance when turning and to add stability to the trailer.

Where should a axle be placed on a single axle trailer?

As a start, you will want to determine the approximate 60/40 location of your axle. For example, if your trailer is 84 inches long, you will want to start with your axle approximately 50-13/32 inches from the front of your trailer.