What term describes the heavy beam that supports the ends of joists?

What term describes the heavy beam that supports the ends of joists?

• A. Beams
• B. Purlins
• C. Girders
• D. Stringers

Answer: (C)

That heavy beam is called a girder. In floor framing, joists run across and end on a main support that carries their load down to posts or walls; this primary support is the girder. Girders are typically larger or built-up from multiple pieces to handle bigger loads, which sets them apart from a general beam. Purlins are horizontal members used to support roof rafters, not floor joists, and stringers are inclined members used for stair treads.

That heavy beam is called a girder. In floor framing, joists run across and end on a main support that carries their load down to posts or walls; this primary support is the girder. Girders are typically larger or built-up from multiple pieces to handle bigger loads, which sets them apart from a general beam. Purlins are horizontal members used to support roof rafters, not floor joists, and stringers are inclined members used for stair treads.