Post-tension slabs in buildings
Post-tension slabs in buildings
(OP)
Hi...
If we have 10 floor building with in-situ post-tension slabs with bonding tendons.
I am wondering about typical schedule of construction for these floors.
I am clear for steps in case of one slab, but I am not sure about passing to the next floor.
Could we do concreting of the 2nd floor if the first floor isn't yet fully stressed.
Thx for the tips.
If we have 10 floor building with in-situ post-tension slabs with bonding tendons.
I am wondering about typical schedule of construction for these floors.
I am clear for steps in case of one slab, but I am not sure about passing to the next floor.
Could we do concreting of the 2nd floor if the first floor isn't yet fully stressed.
Thx for the tips.






RE: Post-tension slabs in buildings
It can even help when the loads to be added later are quite significant and fully stressing the slabs would be contrary to proper control of the stresses.
RE: Post-tension slabs in buildings
If the upper shores are placed directly over the lower shores there shouldn't be any problem with pouring the next level before stressing the lower level. However the normal approach is to pour, stress, strip, reshore and then pour the next level.
RE: Post-tension slabs in buildings
Normally with bonded PT, 25% of the stressing is done at 1 day after the pour. The remainder when the concrete strength reaches the nominated value fot the anchorages normally 22MPa (clyinder) for mononstrand tendons and 25MPa for multistrand. (ignore suggestions such as 2/3 or 3/4 of concrete strength). The first stage can be ignored if sufficient unstressed reinforcement is provided on all tension faces to provide shrinkage crack control. But this is not preferred.
RE: Post-tension slabs in buildings
RE: Post-tension slabs in buildings
An expert is a man who has made all the mistakes which can be made in a very narrow field
RE: Post-tension slabs in buildings
RE: Post-tension slabs in buildings
RE: Post-tension slabs in buildings