AISC has limits on slenderness for braces in Specieal Concentrically Braced Frames. Below is section 13.2a.
"Bracing members shall have Kl/r < 4*(E/Fy)^.5
Exception: 4*(E/Fy)^.5 < Kl/r < 200 are permitted in frames in which the available strength of the column is at least equal to the maximum...
I agree, the shores along column lines should be designed to support the overload force from the tendons. Now, what about the slabs below?
The increased shore load along the column lines is accompanied by a decreased shore load at the mid spans. The column lines below (through the loading...
I am concerned about the loads on the shores. If the shores are placed at every 4 feet they are designed to take a 4' x 4' tributary weight of the slab. The shores and slab below are designed to distribute that weight out. If only the distributed tendons are stressed it will decrease the...
I am unclear as to how the applied load hasnt changed. The horizontal force in the tendon is creating upward and downward forces in the slab, basically redistributing the slab weight towards the tendon high points.
In a two way PT floor the distributed tendons are usually stressed (100%) first. This would create a line of uplift at midspan and a line of downward force along the column lines. This increase in force is not accounted for in the shoring designs of most contractors. Although the loading is...
