Residential Wood Roof Framing

Wood lumber standard ps 20 provide for framing lumber surfaced to standard sizes at the unseasoned condition s grn at 19 percent maximum moisture content s dry.

Residential wood roof framing.

Jit applies a unique approach to large scale wood frame projects including multi unit residential facilities and other major commercial projects. However before concentrating on roof framing a brief discussion of diaphragms and shear walls is presented because they are two of the key elements in the framing of load bearing wall systems in most residential and light commercial construction. Building framing begins with the roof framing structure. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches.

Complete book of framing second edition updated and expanded is a comprehensive guide to rough carpentry and framing written by an expert with over forty years of framing experience. Continuing on from part 3. Line length is the hyptenuse of the triangle whose. Here we have a wood framed gable roof.

Figure 2 2 roof framing terms. The engineering knowledge needed to cost effectively design homes or evaluate residential construction guidelines are lacking in this area. Design of wood framing 5 1 general this chapter addresses elements of above grade structural systems in residential construction. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

Introduction to prescriptive roof framing 3 prescriptive roof construction the international residential code irc and the international building code ibc set out specific guidelines within which conventional light frame wood structures may be built without the need for engineering analysis of each component. Whether it s new construction or a remodel we ll provide a complete wood framing solution to successfully take your project from concept to completion. Let s consider a basic gable wood roof framing design. Therefore this chapter focuses on structural design that specifies standard.

If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. This book guides the reader through step by step framing instructions for floors walls roofs door and window openings and stairs. As discussed in chapter 1 the residential construction material most commonly used above grade in the united states is light frame wood. This is known as prescriptive.