You could consider Diwidag as your
rods. I seldom see these referenced on the list. They are high strength
material with upset deformations like concrete reinforcing bars (which is
exactly what they are). The upset deformations form threads which can
screw into couplings and anchors that will develop the full strength of the
Dywidag is a German company.
Their product is readily available and commonly used in Canada; but, as I said
above, I have not seen them referenced on the list, therefore you may have an
availability problem in your area.
Just some thoughts that you may or
may not find useful.
H. Daryl Richardson
----- Original Message -----
Sent: Saturday, March 13, 2010 1:00
Subject: Re: Diagonal rod bracing
Thank you for the reply and the warning. Section 1618.104.22.168 does indeed
prohibit the use of tension only braces, but Sec 9406.7.4 states that you can
use rod braces in hillside construction if you use 5-times the load, and the
connections must develop the full yield value of the rods. Pretty draconian
requirements and I may not be able to comply, so I'm thinking to use
Charles Laines, S.E.
In a message dated 3/11/2010 6:12:37 P.M. Pacific Standard Time,
I’m not sure if you
are aware of L.A. Hillside Ordinance, but you need to look at Sec. 1613.9 of
the 2008 City of L.A.
bracing is no longer permitted.
Sent: Thursday, March 11, 2010 5:06
Re: Diagonal rod bracing
I don't know why you wouldn't be able to
On Thu, Mar 11, 2010 at 5:05 PM, David Topete <d.topete73(--nospam--at)gmail.com>
Well, you could you super-duper conservative and
design for R = 1.0 along the line of bracing. The superstructure would
be wood shearwalls or steel frames deigned for their respective modification
factor. the old CBC of '01 had rod bracing systems. I don't know
why you would be able to argue for an equivalent R factor based on '07 CBC.
On Thu, Mar 11, 2010 at 3:51 PM, <ENGRLAINES(--nospam--at)aol.com> wrote:
I’ve been asked to
provide guidance on remodeling a single story wood framed “stilt house” in
Angeles hills built in the ‘60’s. The house is
supported by heavy wood girders and posts with crossed steel rods between
all the posts to carry lateral loads to the grade beam and caisson
foundation. No existing original construction plans. I expect to have a
geotechnical report for the foundation, but the rod bracing is mine. I
cannot find an exact fit for the seismic “R” values: a wood frame with steel
bracing. The remodeling will be extensive so the whole building will have to
be updated per the current code. I can change out the rod bracing with steel
rolled sections but that still leaves a wood frame with steel bracing. Any
LAINES ASSOCIATES, LONG