What Is Top Chord Bracing

The requirement for a top chord bracing system is to transfer forces generated in the top chord restraints (usually roof battens or purlins) back to the supporting structure. The forces are generated by resisting buckling of the top chord members and by wind loading perpendicular to the span of the trusses.

What is a top chord bearing floor truss?

Between the floors, a top chord bearing truss is used to support the second story floor assembly. The ends of these trusses are visible on the exterior, and to support between them requires considerable wood blocking.

How is truss area calculated?

We’ll start with a flat truss: The truss is 24-0-0 in length and 4-0-0 tall. Multiply the Span by the Height to calculate the area: 24ft x 4ft = 96 sq-ft. area.