Rolled-steel joist
noun
1.
a steel beam, esp one with a cross section in the form of a letter H or I RSJ
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noun 1. a person or thing that rolls. 2. a cylinder, wheel, caster, or the like, upon which something is rolled along. 3. a cylindrical body, revolving on a fixed axis, especially one to facilitate the movement of something passed over or around it. 4. a cylindrical object upon which something is rolled up: the […]
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