Hand Calculations for two-way post-tensioned slab
Hand Calculations for two-way post-tensioned slab
(OP)
Does anyone know of any good sources for hand calculations for a two-way post tensioned slab? I have PCA Notes 318-08 and a time saving design aid I found online.
I'm trying to do a quick check of the capacity of an existing building. It has bays 30' o.c. in both directions, 8.5" slab, column caps are 3'-8" square and is used as office space. The existing plans show 24 tendons about every 30 feet in the exterior bays and 20 tendons about every 30 feet in the interior bays.
The examples in pca show the same number of tendons in the interior and exterior bays. I was wanting to do a quick check of tendon stresses, flexural and shear capacity. Was not planning on looking at deflection.
Anyone know of a good source?
I'm trying to do a quick check of the capacity of an existing building. It has bays 30' o.c. in both directions, 8.5" slab, column caps are 3'-8" square and is used as office space. The existing plans show 24 tendons about every 30 feet in the exterior bays and 20 tendons about every 30 feet in the interior bays.
The examples in pca show the same number of tendons in the interior and exterior bays. I was wanting to do a quick check of tendon stresses, flexural and shear capacity. Was not planning on looking at deflection.
Anyone know of a good source?






RE: Hand Calculations for two-way post-tensioned slab
http://www.post-tensioning.org/category/x_cY2lk4PT...
RE: Hand Calculations for two-way post-tensioned slab
RE: Hand Calculations for two-way post-tensioned slab
The P effective is 26.6 k/tendon
Drawings show 8.5 inch slab with 1" to c.o.g of strands at top and bot of slab
Bays are all 30' x 30'
f'ci=3000; f'c=4500
Lo=60psf
DL=106psf slab + 25 for part+MEP
The design examples I have from PCA show the same number of tendons at the exterior and interior bays. The drawings on this job show:
24 stands at the Exterior Bays
20 strands at the Interior Bays
For 4 bays across the building one way I have: 24 | 20 | 20 | 24 tendons
How does the differenent strands in the int/ext bays effect my calculations?
Thank you!
RE: Hand Calculations for two-way post-tensioned slab
BA
RE: Hand Calculations for two-way post-tensioned slab
RE: Hand Calculations for two-way post-tensioned slab
BA
RE: Hand Calculations for two-way post-tensioned slab
RE: Hand Calculations for two-way post-tensioned slab
Dik