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Where speed meets strength.

Open Joist trusses are manufactured under license by Allegheny Structural Components, Inc. of Emlenton, Pennsylvania, a company founded and operated by the original staff that introduced Open Joist to the United States in 1995. ASC is committed to establishing Open Joist as the preferred floor framing product for today's leading builders. Please use this site as a reference and contact us if you need additional information. Take advantage of the opportunities Open Joist offers you!