How do I identify a 2-hour vs. a 1-hour fire wall on an architectural life-safety plan?

Go directly to the Life Safety / Fire Partition Legend Sheet at the start of the architectural drawing set. A 1-hour fire-rated partition is typically noted with a single dashed center line running through the wall symbol track. A 2-hour fire-rated partition is marked out using a distinct, heavier double-dashed pattern or a bolded solid continuous filled block pattern tracking through the room perimeter layout line.

['Go directly to the Life Safety / Fire Partition Legend Sheet at the start of the architectural drawing set. A 1-hour fire-rated partition is typically noted with a single dashed center line running through the wall symbol track. A 2-hour fire-rated partition is marked out using a distinct, heavier double-dashed pattern or a bolded solid continuous filled block pattern tracking through the room perimeter layout line.']

Stop if

• Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Steps

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• Go directly to the Life Safety / Fire Partition Legend Sheet at the start of the architectural drawing set. A 1-hour fire-rated partition is typically noted with a single dashed...

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