application of the rigid diaphragm property

[Luis camposano]

A question:

Regarding the application of "Rigid Diaphragms" in a slab, when you have a roof with a part with a concrete slab and another with sheets, how is the diaphragm applied? Either the entire roof is taken or only applied to the area with concrete slab.
To give an example, the following figure

regards

 

[rscassar]

What material are the sheets? The sheets seem like they should be applied as a line load along the slab edges.

 

[Luis camposano]

Steel sheets. ...
Polycarbonate sheets. ...
Tile type sheets. ...
PVC sheets. ...
Acrylic Sheets

In the example the sheets on a cantilever structure.

 

[rscassar]

The diaphragm is the concrete slab. Sheets should not be assigned to the diaphragm.

 

[Luis camposano]

Thanks for your answer, it is very helpful.

 

[johnie134]

sheet = no diaphragm