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Re: porches in seismic areas
- To: seaint(--nospam--at)seaint.org
- Subject: Re: porches in seismic areas
- From: Jnapd(--nospam--at)aol.com
- Date: Thu, 15 May 2008 18:31:49 EDT
What do you do when they install the plates backwards.........
In a message dated 5/15/2008 3:18:02 PM Pacific Daylight Time,
But, probably for lighter laterally loaded columns. Using a column base,
shaped similarly to a Simpson CB or LCB but heavier plates and bolts.
For loads in one direction the side plates resist the column base moment by
bending. For loads in the perpendicular direction the bolts resist the
column base moment in bolt values perpendicular to grain. Any
Sent: Wednesday, May 14, 2008 12:43
Subject: Re: porches in seismic
are correct steel tubes are not that expensive and I use them all the
time. Contractors and home owners freak out when you mention steel. They
don't understand where to buy, how to use and therefore it must cost way to
much is the normal response.
tell clients all the time you can use the City or County spec for knee braced
patio supports; but if you go beyond the size they recommend I will not sign
or approve any knee-braced wood post..no
and I do most of our work within 0-15 km of the San Andreas Fault. Our area
has been expecting a 6.5 - 7.5 Quake for the last 20 years. Landers and
Big Bear quakes were not on the main fault branch.
I do when requested is install a 6x6 post inside a HSS6x6x.25 column. The tube
extends 2-3 ft above ground with the post embedded 12' into steel tube.
Clients put stone or brick around the tube so you see just the wood. The
height of the wood depends on how many post are available.
always consider a trellis roof as a solid roof..because within 5 years it
sleep quite well at night.
Johnson & Nielsen Associates