Set analysis options ->space frame
Moment releases assigned so no need to analyse as truss.
Check out all shear and moment diagrams.
To change moment releases after analysis
Right click->releases-> none
Select-> frame->release partial fixity->none
Changes are automatically updated, no need to unlock model. Changes can be made without unlocking model.
Initial -> Analyzed State
Design (menu)->Steel Design->View/revise preferences
Design->Steel Design->Select Design groups->select all groups not ALL->OK
Design->Select Design Combos ->(created load combinations can be added) check automatically generated code-based load combinations
Design->Steel Design->Set Displacements Targets
CTRL+W->Joints-> check labels
Design->Steel Design->Start Design/Check of structures
Red colur shows FOS>1 and the design has failed.
Design->steel design->Verify all members passed
Design->steel design->Verify analysis vs design sections
Analysis must be done again because the analysis sections have changed. So, the forces and moments will also change. Repeat the process again. Repeat until all sections match.
Diagonals are still unsafe after design. The four diagonals are red coloured.
Select unsafe memebers->unlock member->create girder 2 group ISWB (400-600)->assign to girders
If self wt. is not set to 0, BM is created in truss members also.
If no-one section is safe, double channel may also be used.
MAKING DOUBLE CHANNEL FROM SECTION DESIGNER
Double ISMC 300(Back to Back), Clearence =15mm
Define->Section Properties->Frame Sections->Other->Section Designer
Set appropriate values
Click Design Section
Right Click Channel-> Change name to ISMC300
The list that was created earlier is shown.
Mirror about y-axis
Select Member->edit Replicate->Linear->x-axis=-115
Assign the newly created section to the unsafe members.
Run analysis again. And run design again. And verify all members passed.
This time all pass.
SAP designs linear members only. Does not design slabs.