# How do you calculate bridge weight limit?

## How do you calculate bridge weight limit?

W = 500(LN/N-1 + 12N + 36) W = Overall gross weight on any group of 2 or more consecutive axles to the nearest 500 pounds. L = Distance in feet between the extreme of any group of 2 or more consecutive axles. N = Number of axles in the group under consideration.

### What is the weight limit for a bridge?

The Federal-Aid Highway Act Amendments of 1974 established the bridge formula as law, along with the gross weight limit of 80,000 pounds (36,000 kg).

What is the bridge formula for CDL?

The bridge formula is: W = 500 ((LN/(N-1)) + 12N + 36). W = the overall gross weight of any two or more consecutive axles to the nearest 500 lbs. L = the distance (in feet) between the outer axles in a group of two or more axles.

What do bridge weight limit signs mean?

Through bridge weight limit signs, the traveling public receives notice of the maximum vehicle weight a specific bridge can safely support. The signs also help extend bridge service life by preventing damage and potential failures.

## How much weight can you haul on 7 axles?

The gross weight limit on any one wheel, or wheels, supporting one end of an axle shall not apply to vehicles with livestock loads….Alternate Axle Group Weight Chart.

Distance in feet between first and last axles of group Allowed load in pounds on group of axles
6 32,200
7 32,900
8 33,600
9 34,300

### How much weight can you put on a single axle tractor?

20,000 pounds
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.

Why do bridges have weight limits?

Bridges are typically posted with a weight restriction because a structural member(s) within the bridge has succumb to deterioration resulting in a reduction of that members structural capacity to carry the pre-design loads. In most instances, bridges are weight restricted for the deterioration of a bridge beam.

What is the weight limit for skydiving?

Understanding Skydiving Weight & Age Limits The maximum weight limit for Tandem Students is 220 lbs, with some exceptions. Maximum weight limit for AFF students is 240 lbs.

## How much weight can a single axle tractor pull?

### How do I find the axle weight of my truck?

Multiply the center of gravity distance times the weight to get the moment for each component and item. Add all of the moments and divide by the wheelbase to get the weight on the rear axle. Subtract the rear axle weight from the total weight to get the front axle weight.

What is the dot weight limit per axle?

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).