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Original Request
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Request ID:
8573
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Date Submitted:
September 30, 2021
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Requested By: Shane Kittendorf
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Code:
Residential
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Edition:
2021
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Chapter:
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Section:
R302.2.4
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Topic:
Townhouse Fire Separation
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Question:
1. Is it the intent of the FBC - Residential volume, Section R302.2.4 Structural Independence, Exception(s), to allow for the support and anchoring of the structural members of the roof and floor to the common wall?
2. Is a Townhouse Unit under the residential code R302.2.4 considered structurally independent if the common wall has roof and floor structural members supported on ledgers and secured in buckets anchored to the common wall from both townhouse units?
3. If the answer is no to either question listed above, would that mean that the Townhouse units meet compliance with the FBC-Building Code?
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Comments:
In reviewing the residential code for Townhouses R302.2.4 Structural Independence, Exception(s), there are 4 exceptions under this category for structural independence.
1. FOUNDATIONS supporting Exterior and common walls
2. Structural Roof and Wall SHEATHING from each unit fastened to the common wall framing.
3. NONSTRUCTURAL wall and roof COVERINGS.
4. Flashing at termination of roof covering over common wall.
When reviewing the FBC - Building code as it relates to Townhouse units, the codes are extremely similar except 706.4.1.2 (3) Each dwelling unit sharing such wall shall be designed and constructed to maintain its STRUCTURAL INTERGITY INDEPENDENT of the unit on the opposite side of the wall.
Exception: Said wall may be penetrated by roof and floor structural members provided that the fire-resistance rating and the structural integrity of the wall is maintained.
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