Roof Truss Chord

End trusses close in the end of a building and provide a nailing surface for the upper end wall or rigid sheathing.

Roof truss chord.

Dropped chord roof truss. Standard repair detail to pad top chord to match roof plane 2 1 2 maximum download. Standard repair detail to notch 2x6 top chord of gable truss. These steel joints are needed to support the overall truss.

Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches. The parallel chord or fl at truss gets its name from having parallel top and bottom chords. These trusses are positioned on the top plate of the endwall so the entire bottom chord is supported by the wall. On a typical truss they will be made from 2 x 4 s.

Most economical when the difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch. 500 sycamore street p o. It is most often used for roof construction. The parallel chord or flat truss gets its name from having parallel top and bottom chords.

They have two top chords one bottom chord and multiple vertical posts. For trusses with longer spans or when they are spaced very far apart for purlins use 2 x 6 s. All truss designs are optimized to provide the most economical configuration for the specific application. They will serve as rafters.

The top chord or chords are the single most important elements of a roof truss. The gable truss serves as the end cap for the roof. Similar to the raised heel truss this type also creates a vapor barrier creating great insulation characteristics. Standard repair detail to pad top chord to match roof plane 2 1 2 maximum mii rep11b.

Some common trusses are named according to their web configuration such as the king post fan fink or howe truss. Roof trusses are convenient and reliable. The more complex the truss framework is the greater quantity of these joints will be required. Any weight imposed on the end truss is directly transferred to the endwall which transfers the weight to the foundation.

Standard repair detail to notch 2x6 top chord of gable truss. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. Gable trusses are built on each end of the roof framework to support roof sheathing. Gable trusses will cost anywhere from 25 to 50 more than standard style trusses.

All truss designs are optimized to provide the most economical application. The same thing is true for the bridge of the truss. The dropped chord variant is composed of a convention truss with a secondary chord truss suspended below to help reduce uplift.