UFC 3-260-11FA
25 May 2005
Table 3-4
Transverse Joint Spacing
Joint Spacing
Pavement Thickness
Meters (Feet)
Millimeters (Inches)
Army and Air Force
Navy
Less than 230 (9)
3.8 to 4.6 (12.5 to 15)
4.6 (15)
230-305 (9 to 12)
4.6 to 6 (15 to 20)
4.6 (15)
Over 305 (12)
6 (20) max
4.6 to 6 (15 to 20)
NOTE: For Navy pavements, transverse joint spacing cannot vary more than 25
percent of longitudinal joint spacing.
3-6.10.2.2 Longitudinal Joint Spacing. (See UFC 3-260-02.) For the Army and Air
Force, if the paving lane width exceeds the joint spacing criteria in Table 3-4, a center-
sawed contraction joint is required.
The standard panel size for Navy pavements is 3.8 by 4.6 meters (12.5 by 15 feet), with
longitudinal joint spacing of 3.8 meters (12.5 feet). For pavements having a thickness
greater than 300 millimeters (12 inches), joint spacing can be increased to a maximum
of 6.1 meters (20 feet).
3-6.10.2.3 Expansion Joints. (See UFC 3-260-02.) Expansion joints should be used
in these areas:
At intersections of pavements with structures.
At non-perpendicular pavement intersections.
Between old and new pavements with non-aligned joints.
3-6.10.3
Load Transfer. (See UFC 3-260-02.) When properly designed and
constructed, most joints provide load transfer from one slab to the adjacent slab. Load
transfer efficiency is usually the ratio of deflection of the unloaded side to the deflection
of the loaded side of a joint. Most pavement design assumes a load transfer of 25
percent. Different amounts of load transfer can be obtained through the use of
aggregate interlock, dowel bars, keyways, a stabilized base, or a combination of
approaches.
3-6.10.3.1
Types of Load Transfer
Aggregate Interlock. Partial depth sawing of contraction joints results
in the formation of a crack for the unsawed depth that provides
aggregate interlock. Undowelled contraction joints rely on aggregate
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