interior shear wall over 8 foot

[jeff_gates]

How do I install the interior shear wall correctly?

I have 3 areas that I need to add an interior shear wall, the ceiling is over 8 feet. Do I hang the CDX vertical then add the 1-2 feet above? Do I need to add blocking or anything special?

Thanks,
Jeff

 

[jbwilkins]

If it’s over 8’ and has a horizontal seam it will need to be blocked....there’s should be a minimum nailing pattern, but I don’t know what it is off the top of my head.
( maybe 6” OC on the perimeter and 8” in the field with 8d)......you also must tie the bottom and top plates to the panel...

 

[strutaeng]

Give us more information please.

Who designed the shearwalls? Is this new construction or retrofit?

One does not simply go by installing shearwalls unless they are in plans, and the plans specify location, orientation, panel thickness, nailing patterns, holddowns, etc.

 

[RocketScott]

Drive down to Evergreen in Port Orchard and buy 10' sheets.

If you already have the 8' sheets you just need to run them vertically and block the top panel edge. Orientation of the sheet doesn't matter for shear walls but you should try to minimize blocking.

 

[mcbane]

10 ft sheets will be the least amount of work. If you use 8 ft sheets you should use blocking and should stagger the horizontal seam. By stagger, I mean that one 8 ft sheet starts at the floor with a 1-2 ft piece above, and the next 8 ft sheet starts at the ceiling, with a 1-2 ft piece below.

If you dont want to stagger the joints, see IBC Table 2306.3.1 - you will need to use more nails at the horizontal seams to get an equivalent shear panel capacity.

 

[jeff_gates]

Evergreen doesn't have them.
Our engineer called out shear walls, and the nail schedule 10d 3 inch on center and 12 inch in the field.
The house is 3 stories, second and third floor has huge glass walls.

 

[strutaeng]

Evergreen doesn't have them.
Our engineer called out shear walls, and the nail schedule 10d 3 inch on center and 12 inch in the field.
The house is 3 stories, second and third floor has huge glass walls.

Usually the plans will have a schematic on orientation of panels. I see them horizontally all of the time, never vertically in my part of the country. I would ask the engineer.

Ask first to confirm orientation and if there are any special blocking requirements.

 

[GMCGarage]

Evergreen doesn't have them.
Our engineer called out shear walls, and the nail schedule 10d 3 inch on center and 12 inch in the field.
The house is 3 stories, second and third floor has huge glass walls.

the shear resistance of plywood is the same, regardless of direction. Figure out what is best for you. Place blocking as directed by engineer.

 

[strutaeng]

the shear resistance of plywood is the same, regardless of direction. Figure out what is best for you. Place blocking as directed by engineer.

I thought that the orientation made a difference, but that is for diaphragm shear (decking). IBC table 2306.3 footnote B says, "...Install panels either horizontally or vertically..."

Good Luck.

 

[jeff_gates]

I'll call the engineer tomorrow, thanks.

 

[willymakeit]

I'll call the engineer tomorrow, thanks.

Have him provide you a detail.

 

[RocketScott]

Evergreen doesn't have them.
Our engineer called out shear walls, and the nail schedule 10d 3 inch on center and 12 inch in the field.
The house is 3 stories, second and third floor has huge glass walls.

I missed the part where you want CDX. I have a whole stack of 10' OSB that came from Evergreen at my job in Lakewood.

You're probably going to need to use 3x members at adjoining panel edges because of the 3" edge spacing. Look in the notes of the shearwall schedule.

I'll pm you my contact info.