What is LF(Linear Feet)?

If the length sells a material, it is likely measured in linear feet. Estimators use LF every day when measuring products that run in a straight line.

Definition

Linear feet (LF) is a measurement that tells you how long something is from one end to the other.

Purpose

Measuring in LF keeps estimating simple when only the length of a material matters. Instead of measuring area or volume, contractors measure how many feet of lumber, piping, or fencing are needed for a project. The same approach is used for plumbing, irrigation systems, trim, molding, and many other materials. These measurements are then used for material takeoffs, cost estimates, and procurement planning.

Examples of Use

Interior finishing: An estimator measures the linear feet of baseboards needed for every room before placing an order.
Utility work: A plumbing contractor calculates the total linear feet of piping required for a new water supply line.
Site development: Before installing a perimeter fence, the contractor measures the property boundary to determine how much fencing material is needed.

Related Terms

Surcharge

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Surcharge refers to an extra fee added to the set price. In construction and engineering, it also signifies a load on soil or structures that may affect stability.

Kips Per Square Inch (KSI)

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Kips per square inch (KSI) is a stress unit used in structural engineering and material science to measure the force applied over a specific area.

Notes

LF measures length only. It does not include the width or thickness of a material.
Materials such as lumber, pipes, moldings, cables, and fencing are commonly estimated in linear feet.
Construction estimates and bills of quantities often use the abbreviation LF instead of writing out "linear feet."

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