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Interior braced wall panel connection to roof framing?

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met33

met33

Materials
Apr 9, 2024
29
Are there any required (or recommended) connections between interior braced wall panels and roof framing? This is for a single story, detached, one-family home in Seismic Design Category B.

R601.10.8 says braced wall panels shall be connected to floor framing or foundations. I assume this applies to both exterior and interior braced wall panels. R602.10.8.2 says that exterior wall panels shall be attached to rafters or roof trusses, but does not mention interior braced wall panels.

The braced wall layout for this home is shown in the diagram below. The exterior walls will use the CS-WSP method. The interior portions of BWL B and C will use the GB method. Mixing these two methods (CS-WSP on the exterior and GB on the interior) along a braced wall line in Seismic Design Category B is permitted according to R602.10.4.1.

Roof trusses run parallel to BWL B and C. To avoid truss uplift issues, I assume it would be best to not connect the interior portions of BWL B and C to the roof trusses? Or, if a connection is necessary or would assist in load transfer, perhaps Simpson roof truss clips would be appropriate?

braced_wall_lines_ksvqih.png
 
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Does anyone know whether interior braced wall panels should be connected to roof framing or roof trusses?

IRC R602.10.8 and R602.10.8.2 suggest that the answer is "no", but this doesn't make sense to me. How else will the load from the roof diaphragm, roof framing, and ceiling be transferred to internal braced wall panels?

It appears that AS1684 “Residential Timber Framed Construction” (Australia) has explicit requirements and guidelines for making this connection in Section 8.3.6.9 and Table 8.23:


8.6.3.9_highlighted_small_jd43r4.png


Table_8.23_a_mfke6k.png

Table_8.23_b_and_c_dd0ayl.png

Table_8.23_d_e_f_nuoexo.png

Table_8.23_g_h_i_uhwvao.png

Table_8.23_j_k_dxhrhz.png
 
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I just do the math and make a connection that works
 
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Thank you, that's what I'll do.

I'm still unsure of the code requirements though, if any, for interior braced wall panel connections to other parts of the building.

My reading of the code is that interior braced wall panels need not be connected to roof framing or foundations, except for higher seismic design categories where foundations are required under them in certain situations.

Is the assumption in the code that loads will be transferred to/from interior braced wall panels by the ceiling and floor diaphragms? (gypsum ceiling and subfloor sheathing)
 
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