2006 residential code of ohio john j. hester, p.e., cbo swoboa president understanding section...

2006 Residential Code of Ohio2006 Residential Code of Ohio

John J. Hester, P.E., CBOJohn J. Hester, P.E., CBOSWOBOA PresidentSWOBOA President

Understanding Section R602.10

Wall Bracing

Seminar Goals…Seminar Goals…

the forces are we designing to resist.

For participants to leave this seminar with a general understanding of…

the four wall bracing design approaches in the code.

various wall bracing related definitions.

the calculations involved in braced wall panel construction.

more bracing stuff...

2006 RCO: Chapter 22006 RCO: Chapter 2

Definitions…

BRACED WALL PANEL: A section of a braced wall line constructed in accordance with Section R602.10 for wood framing or Section R603.7 or R301.1.1 for cold-formed steel framing, which extends the full height of the wall.

BRACED WALL LINE: A series of braced wall panels in a single story constructed in accordance with Section R602.10 for wood framing or Section R603.7 or R301.1.1 for cold-formed steel framing to resist racking from seismic and wind forces.

Definitions…


DESIGN COLLECTOR: A structural member used to transmit tension/compression forces from the end of a braced wall line to the first braced wall panel.

Definitions… (not in Chapter 2)


A design collector is only required when the first

braced wall panel is located more than 12 ft. from the

end of a braced wall line.

SHEAR WALL: A general term for walls that are designed and constructed to resist racking from seismic and wind by use of masonry, concrete, cold-formed steel or wood framing in accordance with Chapter 6 of this code and the associated limitations in Section R301.2 of this code.

Definitions…


• Applicability depends upon a jurisdiction’s location.

• Southwestern Ohio is in Design Category B.

Building Planning…

Section R301.2.2 Seismic provisions.

Section R301.2.1 Wind limitations.

• The prescriptive requirements of this code apply to

regions where the basic wind speed is less than 110 mph.

Exempt from all seismic provision!


Section R602.10 Wall bracing.

• There are four wall bracing design approaches:

1. Braced wall panel construction method, Section R602.10.3

2. Continuous structural panel sheathing method, Section R602.10.5

3. Alternate braced wall panel method, Section R602.10.6

4. Design of structural elements, Section R602.10.10


A Closer Look…A Closer Look…

RCO Section R602.10.1

Section R602.10.1 Braced Wall Lines


1. Braced wall lines shall consist of braced wall panels.

2. Braced wall panels shall begin within 12.5’ of each end.

3. Braced wall panels shall be in line with each other.

Exception:

Offsets out-of-plane of up to 4’ are permitted provided that the total out-to-out offset dimension in any braced wall line does not exceed 8’.

4. Design collectors are required when the braced wall panel

begins more than 12’ from either end of the braced wall line.

Wall Construction…

Section R602.10.1.1 Spacing.

• The building code requires all exterior walls to

be laterally supported at intervals not exceeding

35'. This is accomplished by the use of braced

wall lines.



Section R602.10.1.1 Spacing.

• The designer has an option to increase the spacing of braced wall lines

from 35' to 50' by utilizing the exception listed in Section R602.10.1.1.

The exception stipulates a two-fold criteria:

1. The wall bracing provided equals or exceeds the amount of bracing

required by Table R602.10.1 multiplied by a factor equal to the braced wall

spacing divided by 35', and

2. The length-to-width ratio for the floor/wall diaphragm does not exceed 3:1.



Calculations from Section R602.10.1


Table R602.10.1…


Section R602.10.3…


Section R602.10.8 Connections

• Braced wall panels shall be connected at their base by one of the following

methods:

1. When paralleling the floor joists braced wall panels shall be placed over a

joist and be nailed per the fastening schedule… 3-16d nails at 16”oc.

2. When perpendicular to the floor joists braced wall panels shall occur over

solid blocking placed between the floor joists and be nailed per the

fastening schedule… 3-16d nails at 16”oc.


Continuous Structural Panel Sheathing

Section R602.10.5


Figure R602.10.5…


Alternate Braced Wall Panels

Section R602.10.6


Figure R602.10.6…


Design of Structural Elements

Section R602.10.10


Section R602.10.10…








more bracing stuff…

Thank You!

2006 Residential Code of Ohio2006 Residential Code of Ohio

2006 residential code of ohio john j. hester, p.e., cbo swoboa president understanding section...

Documents

wall bracing slide

wall construction section

shear wall

connections braced wall

series of braced wall

spacing of braced wall

use of braced wall lines

closer look rco section