Roof Truss Step Bottom Chord

One truss cut only at the third point.

Roof truss step bottom chord.

It has been cut adjacent to a node point. To reinforce the ends of the trusses 3 4 inch plywood gussets were to be attached to both sides of each truss with 10d nails 3 inches on center on all chords. 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. Some spans have a lower rate per foot than others.

The bottom chord establishes the lower edge of a truss. 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. Create a bottom chord while you have established the angle of the trusses with your rafter pieces and cut them in the necessary lengths they still need more support to finish the structure. The adjoining trusses appear slightly out of plain.

The bottom chord is also called a scissors truss. The bottom chord therefore carries combined stress of both tension and bending of the truss. The node gang nail at the cut point looks in distress and has partially pulled out. The span in short is the length of the bottom of the truss.

The bottom chord is the bottom horizontal or inclined member of a truss. This is where you will make a bottom chord. A domestic roof engineered truss has had the bottom cord cut to install an attic access hatch door.