Cutting-edge rebar assemblies, concrete forming & construction supplies
Expansion Joint

Expansion Joint

Expansion Joint Filler fiber, vinyl, foam, cork & asphalt

Over view:

Concrete expands and contracts with temperature and moisture changes. As the temperature rises or the moisture content of the concrete increases, expansion takes place. As the temperature drops, the concrete will contract. The provision to accommodate movement at predetermined locations with proper joint applications prevents the development of stresses that could rupture the concrete.


Types & Spacing:

The basic concept is to provide ample room for the concrete to expand and contract without creating damaging stresses and resultant cracking. Joint type and spacing will vary with each project according to the type of structure, climatic conditions, and anticipated stresses in the concrete. The coefficient of thermal expansion in concrete is 0.0000055 per linear inch of concrete per degree Fahrenheit of temperature change, yielding approximately .66 inch of movement per 100 feet with a 100° F (38° C) temperature range.


To estimate expansion, multiply length in inches x number of degrees of anticipated temperature differential x 0.0000055. Use the resulting anticipated movement to determine correct thickness of the control joint and proper spacing for placement of the joint. Thinner joints (1/4″, 3/8″, or 1/2″) (6.35 mm, 9.53 mm, or 12.7 mm) spaced at frequent intervals offer greater control than thicker joints spaced at greater intervals. 


Some products due to their size and quantity may not be shippable via UPS.
Owens will contact you with a freight quote.

Associated Producer:

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