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Re: Converting ceiling joist to floor joist.

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But it makes a funny looking ceiling ;o)
Chuck Utzman, P.E.
John Riley wrote:
Years ago I figured that sistering 2x8's to existing
2x8's doubles the stiffness, but a 2x4, glued and
screwed to the underside to form an upside down T
quadruples the stiffness . . . which about equals a


--- hadiprawira djohan <hadiprawira(--nospam--at)> wrote:

Fellow Engineers,
A fellow architect was asking me, what is the smart
way to add a new story on top of an existing
structure without replacing/sistering the whole
ceiling joist (2x8 @16"oc) to accomodate new
loadings (need 2x12@ 16"oc) assuming the wall and
the foundation below are adequate.
The question sounds very simple, but is it practical
to build up a composite member from ex.  ceiling
joist? what is the practical way to go? Anybody?
As always, thank you in advance!

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