With the Ribbed-Waffle Slab Parameters command, the design parameters used in the design of concrete ribbed and waffle slabs are determined. Concrete cover, maximum and minimum reinforcement interval, etc. parameters are determined from the rib-waffle parameters window.
Location of the Rib-Waffle Parameters Dialog
Ribbon menu Analysis and Design tab Design Parameters title under the rib-waffle parameters by clicking the command of rib-waffle parameters can be found in the dialogue.
Rib - Waffle Parameters
It determines with parameters which criteria the program will comply with in concrete design and reabr placement stage.
It is the distance from the center of gravity of the tensile or compression rebar inside the rib and waffle teeth to the outer face of the concrete.
Min. tensile percentage
It is the parameter that determines the minimum rebar to be placed in the tension zone in the rib-waffle thread. For rib and waffle threads, this parameter is used at the bottom of the tooth opening and above the tooth support. Under no circumstances can the rebar be less than the limit set by this parameter.
It determines the upper limit of the tensile rebar (upper rebar in the support, lower rebar in the span) to be placed on the rib-waffle thread. Under no circumstances can the rebar exceed the limit specified by this parameter. If it is too much, the program will give the message "section insufficient" for the rib-waffle tooth where the maximum increase is higher.
H for body reinforcement
If the height of the rib-waffle thread is more than the value specified in this parameter, 2 pieces of 10 body rebar are placed on the thread.
Min. stirrup interval
In the program, the spacing of the stirrup to be placed on the rib-waffle tooth is selected not less than the value specified in this parameter.
Max. stirrup interval
In the program, the spacing of the stirrup to be placed on the rib-waffle tooth is selected not to be more than the value specified in this parameter.
Min. B for double stirrup
The width of the rib-waffle thread is compared with this parameter. As long as the width of the thread does not exceed the minimum width specified in this parameter, the threads are equipped with a double arm stirrup. Otherwise, they are equipped with 2 double-armed stirrups.
Consider connecting beam rebars for stirrup lengths determination
When calculating the length of the gingiva, it is thought that it will be placed to surround the flat rebar at the bottom with the top mounting. When this option is checked, it is assumed that the flat rebars coming from the adjacent beam, if any, together with the top assembly are also included in the stirrup. As a result, the stirrup length is calculated with allowance for the rebars coming from the neighboring entrance at the top and the opening is drawn in that way.