Home Inspector Structural Framing Defects Questions and Answers

Question 1

During an inspection of a crawlspace, you observe a floor joist that has been cut to accommodate a new drain pipe.
The notch is located in the center third of the joist's span and removes approximately 50% of the joist's depth.
This is a significant structural defect because:

Accepted Answer

Notches are not permitted in the middle third of the span where bending stresses are highest.

Answer

The notch exceeds the maximum permitted length of one-quarter of the joist's depth.

Answer

Holes, not notches, are required for all plumbing penetrations through floor joists.

Answer

The joist should have been replaced with a properly sized steel I-beam before the pipe was installed.

Question 2

While inspecting an attic, a home inspector discovers that a vertical web member of a roof truss has been completely removed, likely to create storage space. Which of the following statements BEST describes the implication of this modification?

Accepted Answer

The modification compromises the engineered design and can lead to uneven load distribution, sagging, or roof failure.

Answer

This is a minor issue, as trusses are designed with redundant members for safety.

Answer

The alteration is acceptable if the cut ends of the web have been reinforced with metal plates.

Answer

This is a standard practice for creating attic access and does not require further evaluation.

Question 3

An inspector in a basement observes a steel support column (lally column) that is not perfectly vertical and shows significant rust and flaking at its base. This condition should be reported as a defect PRIMARILY because:

Accepted Answer

The lean indicates a potential shift in load, and corrosion can significantly reduce the column's load-bearing capacity.

Answer

The column is undersized for the beam it is supporting.

Answer

The rust is a cosmetic issue but should be painted.

Answer

The concrete floor is likely cracked beneath the column's base plate.

Question 4

Which of the following describes a critical installation defect related to metal joist hangers used to connect floor joists to a ledger board?

Accepted Answer

Using fasteners that are shorter than specified by the manufacturer.

Answer

The hanger is made of galvanized steel, which is prone to corrosion.

Answer

A gap of 1/4 inch exists between the joist and the back of the hanger.

Answer

The joist hanger was installed before the subfloor was attached.

Question 5

In a home's crawl space, the inspector identifies a short stud wall between the foundation and the first-floor joists that lacks any plywood or diagonal wood bracing. This wall, known as a cripple wall, is a structural concern, especially in seismically active areas, because:

Accepted Answer

It is susceptible to collapse from lateral (side-to-side) forces.

Answer

It prevents adequate ventilation of the crawl space.

Answer

It provides a direct path for termites to access the floor framing.

Answer

The studs are not tall enough to support the vertical load of the house.

Question 6

While inspecting the framing around a window opening, you notice that the horizontal member (header) is supported on each end by a single stud. However, the plans for this two-story home specified a double stud (jack and king stud) configuration. This is a defect because the single stud may:

Accepted Answer

Lack the required bearing capacity to support the load from above.

Answer

Not provide an adequate nailing surface for the interior drywall.

Answer

Interfere with the proper installation of window flashing.

Answer

Create a thermal bridge, reducing the wall's insulation value.