Plate Elements - Must 4-noded plates exist in only one plane??

Question:

Must 4- noded plates exist in one plane or may they be warped?
Answer:

Hi,

They should exist in one plane. 

Regards,
DK Lee
Creation date: 8/6/2018 7:59 PM (dklee@midasit.com)      Updated: 8/8/2018 8:59 AM (dklee@midasit.com)