What Is Semi Truck Height?

Semi-trucks, also known as semis, big rigs, and 18-wheelers, are the large trucks that travel interstates and highways. They are so large that it’s important to know semi truck height in order to make sure they don’t hit bridges and other overpasses while traveling.

Semi-trucks typically range in height from 13 feet 6 inches to 14 feet 6 inches, depending on the type of trailer being pulled. The height of a truck can be affected by several factors, including whether it is pulling a box trailer or a flatbed trailer, which may affect the overall height of the vehicle.

The typical height for a semi-truck is 13 feet 6 inches from the ground to the roof of the cab. This includes both the cab and any trailer attached to it.

Most states require that all semis have signs or lights showing their maximum height when not loaded, which is usually 13 feet 6 inches. It’s important for truckers to be aware of this as they travel in order to avoid hitting bridges and other overpasses.

When loaded with cargo, semi-trucks can increase in height significantly due to cargo shifting or stacking on top of one another. The maximum overall semi truck height when loaded must not exceed 14 feet 6 inches according to federal law. This means that if a driver is carrying cargo that exceeds this limit he or she needs to take extra precautions when traveling through low bridges or overpasses.


Semi trucks typically range in height from 13 feet 6 inches up to 14 feet 6 inches depending on what type of trailer they are pulling and what cargo they may be carrying at any given time. It’s important for truckers to be aware of their truck’s maximum height in order to avoid hitting bridges or other structures while driving.

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Stephen Dunn