Structural Systems Inspection Flashcards

Rafter ties are placed in the lower third of the attic space primarily to do what?

Answer: Resist outward thrust of the rafters on the walls

Rafter ties connect opposing rafters low in the attic to stop them from pushing the exterior walls outward.

In a home with brick veneer, weep holes at the base of the veneer may be spaced no more than how far apart under the IRC?

Answer: 33 inches on center

IRC R703.8.6 requires weep holes at a maximum of 33 inches on center, at least 3/16 inch in diameter.

An inspector observes stair-step cracking through the mortar joints of a brick wall near a corner. This pattern most commonly indicates what?

Answer: Differential foundation settlement

Stair-step cracking that follows mortar joints usually means part of the foundation has moved relative to another part.

Floor joists in a living area feel bouncy and springy when walked on. Which condition is most likely responsible?

Answer: Undersized or overspanned joists

Excessive deflection usually happens when joists are too small or too long for the load they carry.

Which fastener is NOT acceptable for attaching a metal joist hanger?

Answer: Drywall screws

Drywall screws are brittle and lack the shear strength needed, so hangers must use the fasteners the manufacturer specifies.

An adjustable steel post with a screw jack top is being used as permanent support under a main girder in a basement. What should the inspector report?

Answer: Temporary jack posts are not intended as permanent supports and should be evaluated

Telescoping jack posts are generally rated for temporary use, and using one permanently should be flagged for evaluation.

Brown, cubical cracking of wood that crumbles to powder when probed indicates what?

Answer: Brown rot fungal decay

Brown rot breaks down the cellulose and leaves wood brown, shrunken, and cracked into cubes.