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Home Builder Guide II


Quiz Questions

1.Foundations in coastal areas must elevate buildings above the Base Flood Elevation (BFE), while withstanding flood forces, high winds, scour and erosion, and floating debris.
True
False
2. Foundations used for inland construction are generally not suitable for coastal construction.
True
False
3.Piles can be driven, augured, or jetted into place. The installation method will vary with soil conditions, bearing requirements, equipment available, and local practice. One common method is to initially jet the pile to a few feet short of required penetration, then complete the installation by driving with a drop hammer.
True
False
4.Pile bracing is determined by the foundation engineer. Common bracing methods include knee and diagonal bracing. Bracing is often oriented perpendicular to the shoreline so that it is not struck broadside by waves, debris, and velocity flow (see figure at right). Temporary bracing or jacking to align piles and hold true during construction is the responsibility of the contractor.
True
False
5.Foundation walls include stemwalls, cripple walls, and other solid walls.

  • Foundation walls are prohibited by the National Flood Insurance Program (NFIP) in V zones.*
  • Use of foundation walls in A zones in coastal areas should be limited to locations where only shallow flooding occurs, and where the potential for erosion and breaking waves is low.
  • Where foundation walls are used, flood-resistant design of foundation walls must consider embedment, height, materials and workmanship, lateral support at the top of the wall, flood openings and ventilation openings, and interior grade elevation.
True
False
6.Continuous, properly connected load paths are essential because of the higher vertical and lateral loads on coastal structures.

  • Building materials must be durable enough to withstand the coastal environment.
  • Masonry reinforcement requirements are more stringent in coastal areas.
True
False
7.Slab-on-grade foundations are also susceptible to erosion and are therefore prohibited in V zones. They also are not recommended for A zones in coastal areas.
True
False
8.Pier foundations are most appropriate in areas where:

  • erosion and scour potential are low,
  • flood depths and lateral forces are low, and
  • soil can help resist overturning of pier.
True
False
9.Crawlspace foundations are prohibited in V zones and are not recommended for A zones in coastal areas.
True
False
10.Pile foundations are recommended for V zones and many A zones in coastal areas.
True
False
11.The figure on the first page of Chapter 16 shows  a properly connected load path from roof to foundation which is crucial in coastal areas.
True
False