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pt-tensioned slab design

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Jojo,

IMO, slabs, both one-way and two-way, reinforced or prestressed, should NOT 
have the live load reduction applied.

It does not take the entire panel (or panels) to be loaded in order to 
produce maximum stresses in the slab, even with a two-way slab.  In fact, 
most of the so called two-way post-tensioned slabs (with tendons banded in 
one direction) are actually one-way slabs and the only reason that they 
"work" is because of the method of analysis used, the equivalent frame method.

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

Jojo See wrote:

. > 05/25/98
. > 
. > hello there!
. > 1. Does any body consider design of post-tensined slab(1-way)
. > where Section 1606 Reduction of live load applies.
. > note : Design Parameters
. >        span = 38 ft end span, 36 ft next span and succeding 8 span.
. >        fc` = 4.0 ksi, fy = 60 ksi, fpu = 270 ksi
. >        LL = 100 psf.   Tributary Area is 38*100=4000 sq.ft
. >        storey ht = 2 storey level
. > Normally I consider this reduction of live load in design of 
. > column(where applies) and design of footing.
. > 
. > thanks a lot,
. > 
. > jojo see S.E
. >