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

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Multiple Choice

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

Explanation:
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.

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