How To Set Floor Teusses On A Wall

I have been told to nail directly to the trusses and i have been told to leave a 1 8 inch to 1 4 inch gap between the top plate and the bottom chord.

How to set floor teusses on a wall.

You ll use the same size lumber to assemble the rim joists as you will for the main floor joists. If the joists are parallel to the new wall adjust the layout so that the wall is directly under a joist. Begin wall assembly by planning the layout of the new wall. The rim joist sits vertically on top of the sill plate along the outside of the frame to create a lip for the main floor joists.

In fact floor trusses are lighter and easier to maneuver than solid heavy joists. Maximum notch depth in the outer third of a joist is one sixth of the joist depth. Notice how the rim joist sits on the inside of the stairwell wall so the floor joists can bear on the wall. No notching in the middle third of a joist.

The maximum depth of a notch at the end of a joist where it rests on a wall or beam can t exceed one quarter of the joist depth. Truss installation isn t difficult. 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. The truss manufacturer can build them so strong that there s no bounce to the floor at all.

This comes in handy if you desire a. Framers must take care however to set the trusses to the manufacturer s. For most jobs 2 in 5 1 cm x 10 in 25 cm boards are an ideal size. The two joists at the top of the stairs provide additional support to hold the stair stringers.

A floor truss can be designed to span 30 or more feet with ease. Limit the length of notches to one third of the joist depth.