Which component carries roof loads down to the foundation in a typical wood-framed house?
Correct Answer
C) Bearing walls and posts beneath beams
In the stated typical load path, roof framing delivers gravity loads to supporting walls or beams, then through bearing studs and posts to the foundation. A ridge board alone is not that complete path. Sheathing can transfer roof and lateral loads, so it is incorrect to say it has no structural function. Actual load-bearing elements should be verified from the construction system rather than inferred from room location alone.
Why This Is the Correct Answer
Option C is correct because bearing walls and posts beneath beams carry gravity loads from the roof framing down to the foundation. Building codes require a continuous load path from the roof to the foundation. Bearing studs and posts provide that vertical path in a typical wood-framed house.
Why the Other Options Are Wrong
Option A: The ridge board acting alone at the peak
Option A, the ridge board acting alone at the peak, is wrong because a ridge board alone does not form a complete path to the foundation. Roof loads must still travel through walls, beams and posts below.
Option B: The roof sheathing membrane
Option B, the roof sheathing membrane, is wrong because sheathing transfers loads to the rafters or trusses and helps resist lateral forces, but it does not carry roof loads down to the foundation. That vertical path runs through walls and posts.
Option D: The drywall shear surfaces
Option D, the drywall shear surfaces, is wrong because interior drywall is a finish material and is not the vertical path that carries roof gravity loads down to the foundation.
Roof to walls to footing
Trace the load straight down: roof framing, bearing walls or beams, studs and posts, then foundation.
How to use: Use this to identify which listed component belongs in the vertical load path.
Exam Tip
Choose the element that makes a continuous vertical path to the foundation; parts that only act at one level are not the full path.
Common Mistakes to Avoid
- -Thinking the ridge board alone supports the roof
- -Assuming roof sheathing has no structural function
- -Deciding whether a wall is load-bearing from room location alone
Concept Deep Dive
Analysis
This question tests the gravity load path in a typical wood-framed house. Roof framing delivers loads to supporting walls or beams, which pass them through bearing studs and posts down to the foundation. The reasoning is to pick the component that forms the continuous vertical path, not a single piece or a surface material.
Background Knowledge
A load path is the route that loads follow from where they are applied down to the ground. In wood-frame houses, roof loads go from sheathing to rafters or trusses, then to bearing walls or beams, through studs and posts, and finally to the foundation. Identifying bearing elements matters when evaluating alterations, damage or removed walls.
Real-World Application
An appraiser inspecting a renovated house sees that an interior wall was removed to create an open floor plan. The appraiser looks for a beam and posts carrying the load and, if none are evident, recommends a structural review.
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