Page 347 - 2018_IRC

WALL CONSTRUCTION

R608.9 Requirements for connections–general. Concrete 3. Proprietary connectors selected to resist loads and
walls shall be connected to footings, floors, ceilings and roofs load combinations in accordance with Appendix A
in accordance with this section. (ASD) or Appendix B (LRFD) of PCA 100.
R608.9.1 Connections between concrete walls and 4. An engineered design using loads and load combi-
light-framed floor, ceiling and roof systems. Connec- nations in accordance with Appendix A (ASD) or
tions between concrete walls and light-framed floor, ceil- Appendix B (LRFD) of PCA 100.
ing and roof systems using the prescriptive details of 5. An engineered design using loads and material
Figures R608.9(1) through R608.9(12) shall comply with design provisions in accordance with this code, or in
this section and Sections R608.9.2 and R608.9.3. accordance with ASCE 7, ACI 318, and AWC NDS
R608.9.1.1 Anchor bolts. Anchor bolts used to con- for wood-framed construction or AISI S100 for
nect light-framed floor, ceiling and roof systems to cold-formed steel frame construction.
concrete walls in accordance with Figures R608.9(1) R608.9.3 Connections between concrete walls and
through R608.9(12) shall have heads, or shall be rods light-framed ceiling and roof systems. Connections
with threads on both ends with a hex or square nut on between concrete walls and light-framed ceiling and roof
the end embedded in the concrete. Bolts and threaded systems shall be in accordance with one of the following:
rods shall comply with Section R608.5.2.2. Anchor
bolts with J- or L-hooks shall not be used where the 1. For ceiling and roof systems of wood-framed con-
connection details in these figures are used. struction, the provisions of Section R608.9.1 and the
prescriptive details of Figures R608.9(9) and
R608.9.1.2 Removal of stay-in-place form material R608.9(10), where permitted by the tables accompa-
at bolts. Holes in stay-in-place forms for installing nying those figures. Portions of connections of
bolts for attaching face-mounted wood ledger boards to wood-framed ceiling and roof systems not noted in
the wall shall be not less than 4 inches (102 mm) in the figures shall be in accordance with Section
1
diameter for forms not greater than 1 / inches (38 mm) R802, or AWC WFCM, if applicable. Wood fram-
2
in thickness, and increased 1 inch (25 mm) in diameter ing members shall be of a species having a specific
1
for each / -inch (12.7 mm) increase in form thickness. gravity equal to or greater than 0.42.
2
Holes in stay-in-place forms for installing bolts for
attaching face-mounted cold-formed steel tracks to the 2. For ceiling and roof systems of cold-formed steel
wall shall be not less than 4 inches (102 mm) square. construction, the provisions of Section R608.9.1 and
The wood ledger board or steel track shall be in direct the prescriptive details of Figures R608.9(11) and
contact with the concrete at each bolt location. R608.9(12), where permitted by the tables accompa-
nying those figures. Portions of connections of cold-
Exception: A vapor retarder or other material less formed-steel framed ceiling and roof systems not
than or equal to / inch (1.6 mm) in thickness is noted in the figures shall be in accordance with Sec-
1
16
permitted to be installed between the wood ledger or tion R804, or AISI S230, if applicable.
cold-formed track and the concrete.
R608.9.2 Connections between concrete walls and 3. Proprietary connectors selected to resist loads and
load combinations in accordance with Appendix A
light-framed floor systems. Connections between con- (ASD) or Appendix B (LRFD) of PCA 100.
crete walls and light-framed floor systems shall be in
accordance with one of the following: 4. An engineered design using loads and load combi-
nations in accordance with Appendix A (ASD) or
1. For floor systems of wood-framed construction, the Appendix B (LRFD) of PCA 100.
provisions of Section R608.9.1 and the prescriptive
details of Figures R608.9(1) through R608.9(4), 5. An engineered design using loads and material
where permitted by the tables accompanying those design provisions in accordance with this code, or in
figures. Portions of connections of wood-framed accordance with ASCE 7, ACI 318, and AWC NDS
floor systems not noted in the figures shall be in for wood-framed construction or AISI S100 for
accordance with Section R502, or AWC WFCM, if cold-formed steel-framed construction.
applicable. Wood framing members shall be of a R608.10 Floor, roof and ceiling diaphragms. Floors and
species having a specific gravity equal to or greater roofs in buildings with exterior walls of concrete shall be
than 0.42. designed and constructed as diaphragms. Where gable-end
2. For floor systems of cold-formed steel construction, walls occur, ceilings shall be designed and constructed as dia-
the provisions of Section R608.9.1 and the prescrip- phragms. The design and construction of floors, roofs and
tive details of Figures R608.9(5) through R608.9(8), ceilings of wood framing or cold-formed-steel framing serv-
where permitted by the tables accompanying those ing as diaphragms shall comply with the applicable require-
figures. Portions of connections of cold-formed ments of this code, or AWC WFCM or AISI S230, if
steel-framed floor systems not noted in the figures applicable. Wood framing members shall be of a species hav-
shall be in accordance with Section R505, or AISI ing a specific gravity equal to or greater than 0.42.
S230, if applicable.

322 2018 INTERNATIONAL RESIDENTIAL CODE ®
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