Federal Bridge Gross Weight Formula

High school (ages 12+)
Transportation

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/federal-bridge-gross-weight-formula

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the formula designation?Federal Bridge Gross Weight Formula (FBGWF), also known as Bridge Formula B
2. Why do trucks need this formula?It protects bridges from getting cracked or broken by heavy trucks. By limiting weight based on axle spacing, it keeps bridges strong and safe for everyone.
3. How does the formula use axles and distance to decide weight?The formula adds the distance between the first and last axle and the number of axles into a math equation. A longer distance or more axles lets the truck be heavier because the weight is spread out.

Gross Vehicle Weight (GVW): The total weight of a vehicle, including its own mass, cargo, and any passengers.
Axle Configuration: The arrangement and number of axles on a vehicle, which dictates load distribution.
Wheelbase: The distance between the center of the front axle and the center of the rear axle (or the center of the rearmost axle in multi-axle configurations).
Stress Concentration: The localized increase in stress in a material caused by geometric discontinuities or load application points.