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Questions and Answers
What is the purpose of gypsum wallboard when used with steel columns?
What is the purpose of gypsum wallboard when used with steel columns?
What is the significance of the calcining process in the context of gypsum wallboard?
What is the significance of the calcining process in the context of gypsum wallboard?
How far should metal studs be placed on center when covering an I-beam?
How far should metal studs be placed on center when covering an I-beam?
Which type of wallboard provides 2-hour fire protection when used in two layers?
Which type of wallboard provides 2-hour fire protection when used in two layers?
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What temperature is not exceeded behind the calcining plane during the fire protection process?
What temperature is not exceeded behind the calcining plane during the fire protection process?
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Study Notes
Steel Beam and Column Protection
- Steel columns or other structural members are protected from fire by gypsum wallboard.
- Gypsum wallboard (or drywall) is applied in layers; the process of calcining the gypsum creates chemical change.
- The temperature behind the calcined gypsum remains below the boiling point of water (212°F), making it slow to lose structural integrity in the heat.
- The chemically calcined gypsum acts as a barrier to heat transfer.
- Metal stud furring, covering an I-beam, can be used for protection.
- The furring is attached to the ceiling joists, positioned to provide fire protection in a specific range.
- The spacing in furring is 24 inches.
- Metal studs extend below the beam for possible expansion and contraction.
- Two layers of wallboard (Type X) provide 2-hour fire resistance.
- The two layers are attached using staggered rips or laminated.
- This system provides a 2-hour fire protection for the beam.
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Description
This quiz explores the methods used to protect steel columns and structural members from fire, focusing on the application of gypsum wallboard. Key concepts include the chemical changes during calcining, the role of metal stud furring, and the specifics of fire resistance ratings. Understand the importance of maintaining structural integrity in high temperatures.
