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Re: Reinforcing High Basement Walls

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This is an excellent solution; but you should also use pressure treated preserved wood to protect against rot.


H. daryl Richardson

"Sprague, Harold O." wrote:

I have constructed 2x6 @ 12" o.c. wood stud walls with a sill plate bolted to the concrete slab at the base and provided a top plate bolted to the floor joists above.  Where the wall parallels the span of the joists I provide solid blocking at about 24" o.c. and bolt the top plate to the blocking.  I fasten the solid blocking to the deck to transfer the shear at the top into the floor diaphragm.  I also provide joist hangers for the stud wall because the shear is so high.You then insulate and finish the wall, and it looks like you did it just to finish the basement.  It does not look like a "fix".

Harold O. Sprague

-----Original Message-----
From: Thor Tandy [mailto:vicpeng(--nospam--at)]
Sent: Thursday, July 31, 2003 4:05 PM
To: seaint(--nospam--at)
Subject: Re: Reinforcing High Basement Walls
 Provided top and bottom are "restrained" and have capacity for the associated fixing, how about FRP?  Steel straps/sections require bolting design and detailing for longitudinal shear etc.  The FRP might be a cheaper option. 
Thor A. Tandy P.Eng MIPENZ
Victoria BC
email: vicpeng(--nospam--at)

----- Original Message -----
Sent: Thursday, July 31, 2003 9:57 AM
Subject: RE: Reinforcing High Basement Walls

> -----Original Message-----
> From: Gary Hodgson & Associates
> I have a house where the basement wall height exceeds the max.
> allowable 8'-2" in the code under the prescriptive requirements.  The
> soil outside is also slightly higher than the code allowed 7'-7".  As
> the house is near completion, the builder is panicking because the
> local Building Dept. will not allow occupancy until they get the
> foundation wall approved by an engineer.
> In the absence of soils tests, I have always required vertical steel
> straps to be bolted to the walls to act as reinforcing.
> Does anyone have any better/alternative ideas?
> Gary Hodgson, P.Eng.
> Niagara Falls, ON

I have used 3" HSS posts inside the foundation wall, at a spacing determined
by the horizontal span capacity of the wall.

The bottom ends were bolted to the floor, and the tops extended to just
below the underside of the floor sheathing, using blocking, etc, to hold the
tops in place and transfer the top reactions into the floor system.

To ensure preloading of the posts steel shims were driven between the posts
and the wall, and tacked in place.

Peter James