VERTICAL STRUCTURAL MEMBERS

In heavy construction, vertical structural members are high-strength columns. (In large buildings, these are called pillars.) Outside wall columns and inside bottom-floor columns usually rest directly on footings.  Outside wall columns usually extend from the footing or foundation to the roof line. Inside bottom-floor columns extend upward from footings or foundations to the horizontal members, which, in turn, support the first floor or roof, as shown in figure 2-2. Upper floor columns are usually located directly over lower floor columns.

In building construction, a pier, sometimes called a short column, rests either directly on a footing, as shown in the lower center of figure 2-3, or is simply set or driven into the ground. Building piers usually support the lowermost horizontal structural members.

Figure 2-3.-Exploded view of a typical light-frame house.

In bridge construction, a pier is a vertical member that provides intermediate support for the bridge superstructure.

The chief vertical structural members in light-frame construction are called studs (see figures 2-1 and 2-3). They are supported by horizontal members called sills or soleplates, as shown in figure 2-3. Corner posts are enlarged studs located at the building corners. Formerly, in full-frame construction, a corner post was usually a solid piece of larger timber. In most modern construction, though, built-up corner posts are used. These consist of various members of ordinary studs nailed together in various ways.

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