Floor Diaphragm Definition Staad

One full diaphragm definition should be provided per line.

Floor diaphragm definition staad. The diaphragm forces tend to be transferred to the vertical resisting elements. The floor load facility is not available if the set z up command is used see section 5 5. The main considerations are does the roof diaphragm qualify as flexible and does the floor diaphragm qualify as rigid. You need to use mass reference load cases if you want to.

If the roof diaphragm satisfies any of the conditions given in asce 7 10 section 12 3 1 1 it can be modeled as flexible. The maximum number of diaphragms allowed by the program default value. Floor diaphragm command is used for rigid diaphragm concept to produce the behavior of the floor slab. If the floor has a shape consisting of a mixture of convex and concave edges then break up the floor load command into several parts each for a certain region of the floor.

However if there is joint list the list can extend to the second line with a continuation sign. If used this option must be the last line of the floor diaphragm system. A horizontal system roof floor or other membrane or horizontal bracing acting to. Diaphragm is determined to be more than two times the average deflection of the vertical resistant elements the diaphragms may be considered as being flexible.

If the floor diaphragm satisfies the conditions given in section 12 3 1 2 it can be modeled as rigid. How to specify rigid floor diaphragm with staad pro.