what is the point of placing straps with bolts or other elements on
the outside (interior) of a basement wall? In Calif. we must use vertical
as well as horiz. reinf. in the wall. This also used but to a lesser extent in
Illinois when I was practicing there 40 yrs. ago.
Stan Scholl, P.E.
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
Sent: Thursday, July 31, 2003 4:05
Subject: Re: Reinforcing High
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.
----- Original Message -----
Sent: Thursday, July 31, 2003 9:57
Subject: RE: Reinforcing High Basement
> -----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
> 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