Steel Deck
Steel Deck
(OP)
Does anyone know if standard 22 gauge roof deck has similar properties in non-orthagonal directions than it does in primary directions?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Steel Deck
RE: Steel Deck
RE: Steel Deck
RE: Steel Deck
exactly....if you remember your Mohr's Circle exercises, shear on a small segment involves the same dual couple on both orthogonal directions. It doesn't matter which "direction" the shear is in because shear really doesn't have a direction.
RE: Steel Deck
Okay that being said, what do you think the behavior of deck would be if it were subject to rotation (i.e. along a three sided box)?
-Doug
RE: Steel Deck
Now there'is some interest and even some examples built of webs made of deck-like material, but for such applicaiton it seems the stamped indentations run invariably vertical, since this must also preserve better the shear rigidity available. Laying them horizontal would make web crippling too sure, since the flanges wouldn't have support under the applied loads, and overall transversal shape of the built-up shape would be soon lost.
RE: Steel Deck
RE: Steel Deck
RE: Steel Deck
Using 22 gauge steel deck is common practice in the United States. Most building roof decks are simple steel deck.
RE: Steel Deck
RE: Steel Deck
You can find some technical info there too.
http://www.us.hilti.com/
look at the tech lib. and software sections
RE: Steel Deck
I tried to download the Hilti diaphragm program last week but when I tried to run it, it gave me an error about a missing file.
RE: Steel Deck
My theory is: That if I load the deck in an orthagonal direction, I get shear along the 45 deg. plane. If then you are asking the deck to rotate as well in order to resist the 3-sided box, then some of the deck will be in compression/tension parallel to the flutes, and some will be in comp/tension perpendicular to the flutes. The loading perpendicular to the flutes will control since this value is much lower (rationally) than deck in the other direction. My question is what is that value and how would I find it.
Back to my other quesiton, does anyone know how to calculate the deflection of the 3-sided box?
RE: Steel Deck
RE: Steel Deck
RE: Steel Deck