FP24 Eng

STANDARD

SPECIFICATIONS

FOR CONSTRUCTION OF

ROADS AND BRIDGES

ON FEDERAL HIGHWAY

PROJECTS

FP-24

U.S. Department
of Transportation
Federal Highway
Administration
Federal Lands
Highway

Standard Specifications
for Construction of
Roads and Bridges on
Federal Highway Projects
FP-24

UNITED STATES DEPARTMENT

OF TRANSPORTATION

Federal Highway Administration

PREFACE

These Standard Specifications for the Construction of Roads and Bridges on Federal Highway Projects are issued primarily for constructing roads and bridges on Federal Highway projects under the direct administration of the Federal Highway Administration. These specifications are cited as "FP-24" indicating "Federal Project" Standard Specifications issued in 2024. When designated in a contract, the FP-24 becomes part of the contract and binding upon all parties to the contract. Construction contracts of the Federal Highway Administration are also governed by the following regulations:
•

Federal Acquisition Regulation (FAR), Title 48, Code of Federal Regulations, Chapter 1; and

•

Transportation Acquisition Regulation (TAR), Title 48, Code of Federal Regulations, Chapter 12.

The FAR and TAR regulations are not included in the FP-24. A complete copy of the FAR is available from the Superintendent of Documents, Congressional Sales Office, U.S. Government Publishing Office, Washington, DC 20402.
U.S. Customary units of measure are used in the FP-24. The references to Metric or Metric units apply only where standardized testing requires Metric units of measure.

i

METRIC TO U.S. CUSTOMARY CONVERSION FACTORS (approximate)

Symbol

When You Know

Multiply By

To Find

Symbol

LENGTH

µm

micrometers

3.9 × 10-5

inches

in

mm

millimeters

0.039

inches

in

m

meters

3.28

feet

ft

m

meters

1.09

yards

yd

km

kilometers

0.621

miles

mi

AREA

mm2

square millimeters

0.0016

square inches

in2

m2

square meters

10.764

square feet

ft2

square meters

1.195

square yards

yd2

ha

hectares

2.47

acres

ac

square kilometers

0.386

square miles

mi2

m

km

VOLUME

mL

milliliters

0.034

fluid ounces

fl oz

L

liters

0.264

gallons

gal

m3

cubic meters

35.31

cubic feet

ft3

cubic meters

1.308

cubic yards

yd3

m

MASS

g

grams

0.035

ounces

oz

kg

kilograms

2.2046

pounds

lb

Mg

megagrams

1.1023

short tons

T

(or "t")

(or "metric ton")

(2000 lb)

TEMPERATURE (exact)
°C

Celsius
temperature

1.8C +32

Fahrenheit
temperature

°F

0.0929

foot-candles

fc

0.2919

foot-Lamberts

fl

ILLUMINATION

lx
cd/m

lux

candela/m

MISCELLANEOUS

J

joule

0.7376

foot·poundforce

ft·lbf

N

newtons

0.225

poundforce

lbf

kPa

kilopascals

0.145

Poundforce
per square inch