Attached is a portion of my STAAD output file which contains an error messsage as shown:
30. LOAD 1 (1.4DL + 1.7LL)31. SELF Y -1.432. MEMB LOAD33. 11 TO 16 UNI Y -2.834. 11 TO 16 UNI Y -5.135. START CONCRETE DESIGN**WARNING - UNEXPECTED COMMAND IN LOAD DATACHECK SPELLING AND ORDER OF DATA IN CASE NO. 1COMMAND= START CONCRETE DESIGNCHECK RESULTS CAREFULLY, LOADS MAY HAVE BEEN LOST***STAAD.Pro WARNING***ANALYSIS NOT PERFORMED - SO ABOVE COMMAND CAN NOT BE PROCESSED.*********** END OF THE STAAD.Pro RUN ***********
Can you explain what it means?
You are following up your load instructions with a concrete design statement. (Notice that after 11 TO 16 UNI Y -5.1, you are specifying START CONCRETE DESIGN). There is no instruction for performing the analysis. A concrete design cannot be done until after the analysis has been performed. So, you need to specify the command PERFORM ANALYSIS in between those 2 lines, as in,
11 TO 16 UNI Y -5.1
PERFORM ANALYSIS PRINT STATICS CHECK
START CONCRETE DESIGN