Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s.
Structural wood floor framing plan.
Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home.
Details for conventional wood frame construction.
The roof framing plan is drawn in the same manner as the floor framing plan.
Designing with wood joist span tables.
Department of housing and urban development s residential structural design guide.
Such methods use a 4 foot design module which governs a 16 inch spacing of joists.
The image below does not show that the floor beam is also supported on its ends by the basement exterior structural walls.
If built up wood posts are being used the width of the post needs to be as wide as the beam that it is supporting.
At this point we ll focus on traditional wood framing for an example house in the next part of residential structural design.
The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members.
A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals.
For a thorough discussion of building structural design see the u s.
Figure 10 20 is an example of a roof framing plan for a wood frame roof.
Our 24 x 26 house floor framing floor beams and posts would now look like the image below.
Design of wood framing 5 1 general this chapter addresses elements of above grade structural systems in residential construction.
Therefore this chapter focuses on structural design that specifies standard.
Some newer homes have manufactured i beam shaped joists.