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decks, glass blocks
- To: <seaint(--nospam--at)seaint.org>
- Subject: decks, glass blocks
- From: "Andrew Kester" <akester(--nospam--at)bbma.com>
- Date: Thu, 16 Sep 2004 11:41:21 -0400
I have done my fair share of designing wood
decks, walkways, and bridges, and even built a couple myself. What type of
moment are you trying to resolve? I assume the lateral wind/ lateral live load
in the plane of the deck? If the deck is coming off of a retaining wall or the
house/building, you can use diag. bracing or diaphragm action. Otherwise, design
your posts with enough embedment in the soil to resist the overturning moment. I
have seen a formula in UBC 97 (didn't like it, seemed too conservative) and I
used to use one in AASHTO that was pretty good. Also Enercalc has a program
module for pole embedment in soil. If you have a Geotech have him tell you how
deep to embed your posts. May I also suggest insisting on deck screws rather
then nails, as you will have a much more serviceable deck, especially in a few
years. It is not much more work at all.
Glass blocks- I just built a shower out of
them at the house, Pittsburgh Corning's website is really good. A good but
expensive product. Maybe someone here can answer this manufacturing question- A
regular block costs about $4 I think, but an end piece with rounded edges is
like $15! Why the big differential?
Andrew kester, pe