Floor Trusses

JLC Field Guide: Floor Trusses

Structurally, an open-web floor truss resembles an I-beam in that it puts most of its material along its top and bottom edges where stresses are greatest. To strengthen a truss, the fabricator may double its top and bottom chords, make side-by-side girder trusses, use larger truss plates or stronger wood, or use some combination of these techniques.

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Floor Trusses Featured Articles

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Framing Fix for a Faulty Foundation

When a foundation is out-of-level and out-of-square, you can shim the joists,... More

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RedBuilt Metal & Wood Composite Floor Truss Review

These trusses have enabled some really cool architectural features. More

Snow, Rain Cause Roof Collapses in Northeast

A series of heavy snowstorms followed by two days of rain were too much for some roofs to handle in February. More

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Beefing Up a Brooklyn Brownstone's Floors and Roof

A 100-year-old row house’s structural brick walls are more than adequate for the building’s loads. But the floors and roof? Not so much. Here’s a look at how the architect, engineer, and builder teamed up to get modern performance from a historic structure. More

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Running a Timber-Framing Business

Modern tools bring this traditional building method into the 21st century. More

Floor Trusses Instruction

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Calculating Live Loads
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Bracing Floor Trusses

With floor trusses, bracing becomes a permanent part of the floor structure. More

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Can a Structural Insulated Panel Delaminate?

Just how reliable is the bond between the OSB skin and the EPS (expanded... More

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Should Floor Trusses Be Attached to Walls Below?

Q. What is the proper way to attach an interior basement wall to floor trusses ? both perpendicular walls and walls that run parallel with the bottom chord and fall between the trusses. I have been told to nail directly to the trusses, and I have bee More

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Q&A: Long-Span Floor Joists

Q. Would floor trusses or wood I-joists be stronger over a 26-foot span? More

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