Renovation-Headquarters Banner

What You Need To Know About Lumber

Part 3


    Planks, as shown in Figure 5, are generally 2 inches thick, but could also be 3 or 4 inches thick. Planks are used as flooring, roofing and decking, directly over and supported by rafters, joists, beams and girders.


    Figure 5 - Planks
  • Lumber cut for Vertical Use:
  • Posts:

    Posts, as shown in Figure 6, are vertical supports, usually short.


    Columns, as shown in Figure 6, are vertical supports, longer than posts and are used to transfer horizontal loads down to the foundations.


    Studs, as shown in Figure 6, are actually mini-columns. Studs are a series of slender structural members placed at small, regular intervals, as the supporting elements in load-bearing wood walls and partitions.

    post, column & stud

    Figure 6 - Post, column & stud

    Additional information on working with studs.

  • Lumber cut for Diagonal Use:
  • Bracing:

    Bracing, as shown in Figure 7, is a piece of lumber applied to the frame on the diagonal to stiffen the structure. In modern construction this bracing is often replaced by use of plywood sheathing.


    Figure 7 - Brasing


    Bridging, as shown in Figure 8, is used in an “X” pattern between the joists to stiffen the floor. It can also be a solid piece of lumber the same dimensions as the floor joists.

    floor joist cross bridging

    Figure 8 - Floor joist cross bridging

    Additional information on floor joist bridging.

Back to Part 1

Part 1

Part 2