NASCLA Accredited Commercial General ContractorWoodEasy
A framing crew is installing roof trusses on a commercial building. The truss design drawings specify a particular connection detail for the truss-to-wall interface, involving hurricane clips. What is the primary purpose of these clips?
- ATo allow for thermal expansion and contraction of the truss.
- BTo distribute the roof load evenly to the wall top plate.
- CTo prevent uplift caused by wind forces.
- DTo provide a seismic connection for lateral loads.
Show answer & explanationAnswer & explanation
Correct answer: C. To prevent uplift caused by wind forces.
Hurricane clips, also known as seismic or wind ties, are specifically designed to resist uplift forces caused by high winds, ensuring the roof system remains securely attached to the wall structure. While they contribute to overall structural integrity, their primary function is uplift resistance.
Why the other options are wrong
- A. Hurricane clips are rigid connections and do not allow for significant thermal movement.
- B. Load distribution is primarily handled by the bearing of the truss on the top plate, not the clips.
- D. While they can offer some seismic resistance, their primary design function is wind uplift, especially in areas prone to hurricanes.
Hurricane Clip
A metal connector used to strengthen the connection between roof framing members (like trusses or rafters) and wall plates, primarily resisting uplift forces.
- Also known as seismic or wind ties.
- Crucial in high-wind zones.
- Typically nailed or screwed into both members.
Memory trick: The roof needs a strong hug to stay on when the wind gets rough.