Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: lateral drift

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Bruno Côté wrote:

. > One way to be convinced of that is the fact that deflection of floors
. > is evaluated only under live loads. If there were any worries that
. > limitations of small deformation theory could be exceeded, the total
. > deflection (dead load + live load) would have to be considered.

The deflection criteria for floors and roofs has nothing to do with large or 
small deformation theory.  The limit of L/360 for live load is the amount of 
deflection such that plaster (or other brittle finishes) probably will not 
crack.  The limit of L/240 for dead + live loads is the amount of deflection 
that probably will not be visually discernable.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona