Structural Systems and Foundations Flashcards

What is the structural function of anchor bolts embedded in a concrete foundation?

Answer: To secure the sill plate (mudsill) to the foundation, resisting uplift and lateral movement

Anchor bolts are cast into the concrete foundation to mechanically fasten the wood sill plate, preventing the structure from lifting off or sliding during wind or seismic events.

What is a crawl space foundation, and what is one key maintenance requirement?

Answer: A short foundation wall creating a shallow below-floor space that must be kept ventilated or conditioned to control moisture

A crawl space foundation uses short foundation walls to elevate the structure off the ground, creating an accessible space that requires moisture control through ventilation or an encapsulated vapor barrier.

In construction terminology, what does it mean for a wall or post to be 'plumb'?

Answer: Perfectly vertical, as verified by a level or plumb bob

Plumb means exactly vertical (90 degrees to level ground), checked using a spirit level, laser level, or traditional plumb bob.

What is the purpose of a sill plate (mudsill) in wood-frame construction?

Answer: To serve as the lowest horizontal framing member that connects the wood frame to the concrete foundation

The sill plate is the pressure-treated lumber member bolted directly to the top of the foundation wall, providing the connection point between the concrete foundation and the wood framing system.

What is engineered lumber, and why is it commonly used in modern construction?

Answer: Manufactured wood products (LVL, LSL, I-joists, glulam) that offer greater strength, consistency, and longer spans than dimensional lumber

Engineered lumber products are manufactured by bonding wood fibers, veneers, or strands under heat and pressure to create structural members with predictable, superior performance compared to sawn lumber.

What is the primary structural function of floor joists in a wood-frame building?

Answer: To span horizontally between bearing supports and carry floor loads to the walls or beams below

Floor joists are horizontal framing members that span between walls, beams, or girders to support the subfloor and transfer floor loads (dead and live loads) to the vertical bearing elements.