This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
Whenever a partition meets an outside wall, a stud wide enough to extend beyond the partition on both sides and to afford a solid nailing for the lathing must be inserted. A nailing surface must be provided for the lathing on both the outside wall and the partition, and the first stud in the partition wall is, therefore, set close up against the wall stud, forming a solid corner. This arrangement is shown in plan in Fig. 114. The large wall stud A is usually made of a 4X 8-inch piece set flatwise in the wall, so that if the partition is, say 4 inches wide, there is a clear nailing surface of 2 inches on each side of the partition. A 4 X 6-inch piece could also be used here, leaving a clear nailing surface of 1 inch on each side of the partition.
Sometimes the same thing is accomplished by using two 4X4-inch pieces placed close together, as shown in plan in Fig. 115, instead of one 4X8-inch piece. Sometimes two pieces, 2X4 inches or 3X4 inches, are used, placed far enough apart so that they afford a space for nailing on each side of the partition, as shown in plan in Fig. 116. Whenever this is done, small blocks A, Fig. 117, should be set in between the two studs at intervals of 2 to 3 feet throughout their entire height in order to give them added stiffness and make them act together.
Fig. 114. Plan of Studding in Outer Wall Opposite Partition.
Fig. 115. Two-Piece Stud in Outer Wall Opposite Partition.
Fig. 116. Placing of 2 X4 Studs to Give Nailing Surface.
The end in view in every case is to obtain a solid corner on each side of the partition where it joins the wall, and any construction which accomplishes this is good. In the best work, however, the 4X8-inch solid piece is used, and this construction can always be depended upon. It makes no difference what the angle between the wall and the partition may be, but usually this angle is a right angle.