"R" Value of LW Concrete on Metal Deck
"R" Value of LW Concrete on Metal Deck
(OP)
Could someone plese provide or point me in the right direction to find the R value for a 3" metal deck with 3 1/4" of lightweight conrete on top (6 1/4" total thickness). Thanks!





RE: "R" Value of LW Concrete on Metal Deck
Lightweight concrete varies, but for typical 100lb/ft3 density you can use around 5 BTU.in/h.ft2.degF (or 0.7 W/mK). This ranges from 2 to 9 (0.3 to 1.3) with increasing density.
Steel is generally 26.2 BTU/ft.degF (or 45.3 W/mK).
RE: "R" Value of LW Concrete on Metal Deck
RE: "R" Value of LW Concrete on Metal Deck
I had to refer to a book to remind me though. Its the heat transfer coefficients that add by using inverses.
Ed
www.engineerboards.com
RE: "R" Value of LW Concrete on Metal Deck